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KTM 990 SUPER DUKE 950 SUPERMOTO 950 SUPER ENDURO REPAIR MANUAL

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Filed Under (KTM) by admin on 22-11-2010

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Adjusting the position of the compression and rebound damping Rebound damping: -Turn in the adjusting screw 1 in a clockwise direction all the way to the stop. -Turn back the respective number of clicks in a counterclockwise direction. Compression damping, low speed: -Turn in the adjusting screw 2 in a clockwise direction all the way to the stop. -Turn back the respective number of clicks in a counterclockwise direction. Compression damping, high speed: -Turn in the adjusting screw 3 in a clockwise direction all the way to the stop. -Turn back the respective number of clicks in a counterclockwise direction. Adjusting the spring preload NOTE: the spring preload is the difference between the unloaded and preloaded length of the spring. -Tighten the adjusting nut 4 with the special tool T106 until you have the prescribed spring preload. -Tighten the lock screw on the adjusting nut Disassembling the shock absorber -Write down the spring preload. -Write down the rebound and compression damping settings, counting the clicks or number of turns while turning in a clockwise direction. -Unscrew all of the adjusting screws in a counterclockwise direction. -Clamp the upper part of the shock absorber in a vise as shown in the photo, using protective jaws. -Loosen the lock screw 1 (AH 4 mm), loosen the adjusting nut 2 using the special tool T106 3 and relieve the spring. NOTE: mark the position of the lock screw. -Press the spring down with the special tool T101S and pull out the spring retainer 4 . -Remove the washers 5 and spring 6 . 4-2 Repair manual WP Shock absorber 990 Super Duke, 950 Supermoto, 950

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2008 KTM Model Engine Oil Recommendation Chart

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Filed Under (KTM) by admin on 24-11-2010

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2008 Model Type Recommended Engine Oil Type Quantity SPORTMINICYCLES AC 50 SX MINI Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L SPORTMINICYCLES LC 50 SX JUNIOR Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L 50 SX Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L 65 SX Motorex Top Speed 4T 15W50 0.5L SX 2 STROKE 85 SX Motorex Top Speed 4T 15W50 0.5 L 105 SX Motorex Top Speed 4T 15W50 0.5 L 125 SX Motorex Top Speed 4T 15W50 0.7 L 144 SX Motorex Top Speed 4T 15W50 0.7 L 250 SX Motorex Top Speed 4T 15W50 0.7 L SX 4 STROKE 250 SX-F Motorex Power Synt 4T 10W50 1.1 L 450 SX-F Motorex Power Synt 4T 10W50 1.35 L 505 SX-F Motorex Power Synt 4T 10W50 1.35 L CROSS COUNTRY 2 STROKE 65 XC Motorex Top Speed 4T 15W50 0.5L 85 XC Motorex Top Speed 4T 15W50 0.5L 105 XC Motorex Top Speed 4T 15W50 0.5 L 200 XC Motorex Top Speed 4T 15W50 0.7 L
200 XC-W Motorex Top Speed 4T 15W50 0.7 L 250 XC Motorex Top Speed 4T 15W50 0.7 L 250 XC-W (e) Motorex Top Speed 4T 15W50 0.7 L 300 XC Motorex Top Speed 4T 15W50 0.7 L 300 XC-W (e) Motorex Top Speed 4T 15W50 0.7 L CROSS COUNTRY 4 STROKE 250 XC-F Motorex Power Synt 4T 10W50 1.1 L 250 XC-F-W Motorex Power Synt 4T 10W50 1.1 L 450 XC-F Motorex Power Synt 4T 10W50 1.35 L 450 XC-W (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L 505 XC-F Motorex Power Synt 4T 10W50 1.35 L 530 XC-W (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L ENDURO RACING 450 EXC (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L 530 EXC (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L SUPERMOTO LC4 690 Supermoto Motorex Power Synt 4T 10W60 Approx. 2.0 L SPORT ATV 450 XC Motorex Power Synt 4T 10W50 2.0 L 525 XC Motorex Power Synt 4T 10W50 2.0 L LC8 950 Super Enduro (R) Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure Orange Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure Black Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure S Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Super Duke Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Super Duke R Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L

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Ktm 690 SM/ SMC/ SMR/ Duke Removal and Installation weld slag

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Filed Under (KTM) by admin on 04-03-2012

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1. Each bike varies with regard to welds and gussets. Review the photos first to get the idea of what needs to be done. 2. These photos may not be your exact model but depict the concept of what must be done. 3. Block the front tire securely before removing the top triple clamp so the tire cannot move at all. See photos. 4. Support the rear tire also, just enough to keep tension on the front tire so the forks stay tight. 5. Warning: Once the triple clamp is loose, the forks can roll away from the bike AND it happens very quickly . 6. The main triple clamp nut adjusts the tension on the steering head bearings. Make note of its tension before removing and do not over tighten the nut. It should be seated just enough to take the play out of the bearing.. 7. The top of the gauge/light cluster is mounted to the top triple clamp. You have to take out 4 self tapping Phillips head screws to remove the gauge pod. There is one connector on the back side of that and then it comes off. Then there are two bolts that need to come out with an 8mm wrench to free the top triple clamp. 8. Loosen the triple clamp pinch bolt under the main nut and forks pinch bolts and remove the top triple clamp, taking note of how tight the main nut is, so you can re-tighten it to the exact amount. Remove the tin bearing shroud (cover) and rubber seal making note of how the seal goes on, (lips face downward). 9. Grease your bearings while you have them exposed. (Keep the grease off the area where our frame bracket mounts!). 10. The goal is to allow the frame bracket to clamp cleanly and squarely around the upper half of the head tube. 11. Review your individual bike’s welding characteristics at the head tube. You’ll notice on the head tube there is a “groove” machined 360 degrees around the head tube. Everything in or above this groove must be clean of welds or slag. If this groove is visible all the way around and no welding slag has extended upward into or past this groove, then you’re installation should be easy. Any welds extending into or above this groove must be filed away, but without changing the clamping area diameter. DO NOT file away the paint on the clamping area if possible. Spend a little more time filing carefully and your bracket will stay tight. 12. Each bike seems to have not only different welds, but slightly different gussets. Evaluate your individual bike to determine the best fit. The bracket must clamp squarely and cleanly to the area just above that groove and yet SIT FLUSH all the way around the diameter of the head tube as per the photo in the lower right corner. Do not allow the bracket to protrude above the seal seating surface. Use a flashlight to see up under the bracket where it’s hitting if it’s not Flush. This bracket has clearance cut into it to clear the backbone of the frame

KTM KINETO TRACKING MOUNT – MODEL K433 Installation and Removal Manual

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Filed Under (KTM) by admin on 30-01-2012

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the KTM meets the needs of a wide variety of test range and scientific applications:  On-board operator, or remote analog or digital control  Payloads up to 1200 pounds (unmanned) or 600 pounds (manned)  Mission configuration with four (manned) or six (unmanned) payload positions  Complete turnkey systems available  Detailed installation documentation FIELD-PROVEN RUGGED AND RELIABLE The KTM consistently demonstrates its performance and durability:  Weather tight seals designed to withstand harsh range environments  The KTM’s direct drive axis design delivers smooth, jitterfree tracking to ensure precise Time, Space and Position Information (TSPI)  Self-contained and trailer-mounted, the KTM is quickly and easily deployed via highway and unimproved roads to remote tracking sites  Digital Control System (DCS) that guarentees system reliability WHEN THE RANGES REQUIRED PRECISE AND RELIABLE OPTICAL TRACKING MOUNTS, THEY SELECTED THE BRASHEAR KINETO TRACKING MOUNT MORE THAN 150 TIMES. Recognized Standard for Tracking Systems Worldwide THE KTM DIGITAL CONTROL SYSTEM (DCS) INCLUDES:  High speed communication via an Ethernet interface to provide remote operation  Advanced servo loop control to optimize tracking performance  Built-in error correction to ensure precision tracking accuracy  Versatile chassis architecture that accommodates additional PC104 cards suchas an “Automatic Video Tracker” (AVT) to satisfy specific customer requirements and missions

KTM EXC Enduro & SX Motocross REPAIR MANUAL

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Filed Under (KTM) by admin on 06-03-2012

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Thanks to a history of competition successes, particularly in off-road racing, KTM motorcycles enjoy a large and loyal following. Established in 1953, KTM (from Kraftfahrzeuge Trunkenpolz Mattighofen where founder, Hans Trunkenpolz, had his engineering works) went through difficult times in the early 1990s. After a takeover, the Austrian company emerged as KTM Sportmotorcycle AG and has gone from strength to strength in recent years. Mainstay of their range are their Enduro and Motocross models, the EXC and SX, and these are covered in the latest new manual from Haynes. Models covered are the 250, 400, 450, 520 and 525 EXC and SX with 4-stroke sohc engines, 2000 to 2007. Information has also been included on the SMR Supermoto versions and MXC/XC derivatives. Haynes Manuals for cars and motorcycles are so popular that 150 million have been sold worldwide. Lay them end-to-end and they would circle the globe at the equator! The new manual begins with essential pre-ride checks, competition prep and routine maintenance tasks before moving on to more major repairs. There are comprehensive, fully illustrated, instructions for overhauling the engine, transmission, brakes, suspension and electrical system. Useful reference pages include colour wiring diagrams, fault-finding charts and a comprehensive section on tools and workshop tips. Because all Haynes Manuals are based on a complete stripdown and rebuild, not only are the procedures written from first-hand experience, but there is information about special tools required for each job, and its complexity, plus Haynes tips for saving time and money. The new Haynes KTM EXC Enduro & SX Motocross Manual is the only complete manual for owners of these motorcycles.

Harley-Davidson S&S Super E and G Series Shorty Carburetors Installation and Jetting Instructions

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Filed Under (Harley Davidson) by admin on 24-10-2010

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throttle linkage with no cable modification. S&S Super E and G carb kits for 1936 to 1989 Big Twins contain a throttle cable guide (11-2339) designed for butterfly type throttle cables, and kits for 1990 and later Big Twins contain a taller throttle cable guide (11-2338) designed for CV type throttle cables. See Picture 2. The two throttle cable guides are interchangeable on the carburetor body, and can be changed very easily to update older carburetors or to accommodate custom throttle cables which are not stock for a particular year chassis. 1981 to Present Sportster Models Stock Sportster models from 1981 to 1987 have two cable throttle system designed for butterfly type carburetors. Sportsters from 1988 to present have a two cable throttle system designed for use with the stock constant velocity (CV) type carburetor. Since the taller #11-2338 cable guide bracket can not be used on a Sportster chassis due to insufficient frame clearance, throttle cables on Sportsters originally equipped with a CV type carburetor must be changed to butterfly style cables. S&S can supply the correct style throttle cables. See S&S Throttle Cable Application Chart. Picture 2 S&S THROTTLE CABLE APPLICATION CHART Length Total Housing Length Vinyl Housing Part Number Open Side Part Number Close Side Fitment 36″ 32″ #19-0430 #19-0431 For Buell with 7/8″ handlebars 36″ 32″ #19-0432 #19-0433 To ’95 ’81-’85 FX and FL; All ’81-’85 XL (Also pre-’81 w/2-cable throttle housing replaced.) For Buell with 1″ diameter handlebar 36″ 32″ #19-0436 #19-0437 ’96-Up 883-1200 XL 39″ 35″ #19-0434 #19-0435 To ’95 Softail (FXSTC, FXST, FLSTC, FLSTF) ’86-’94 FXR, ’93-’95 Dyna 39″ 35″ #19-0438 #19-0439 ’96-Up Softail (FXSTS, FXSTC, FLSTC, FLSTF) ’96-Up Dyna 42″ 38″ #19-0446 #19-0447 To ’95 custom application 42″ 38″ #19-0440 #19-0441 ’96-Up custom application 48″ 44″ #19-0462 #19-0463 To ’95 All FLT Models 48″ 44″ #19-0464 #19-0465 ’96-Up All FLT Models ” 1996 to Present Buells 1996 and 1997 Buells require special S&S butterfly style throttle cables for Buells, which are compatible with the stock 1996-1997 throttle assembly. 1998 and later carburated Buells require installation of stock 1996 – 97 throttle grip and the special S&S Buell style throttle cables when installing Super E or G carburetors. S&S Throttle Kits S&S throttle kits fit 1″ handlebars and can be used on most chassis. (An adapter sleeve is available for use with earlier, 7 ⁄ 8 ” OEM handlebars originally equipped with internal throttle cable.) Barrel fittings on S&S cables readily “plug in” to S&S Super E, G, and stock H-D 1981-’90 butterfly type carb throttle linkage. Kits include one opening and one closing side cable, left and right grips, and handlebar clamps. Kits with 36″, 39″, 42″, or 48″ length cables are available. Length specified refers to overall cable length. Vinyl covered outer housing is 4″ shorter than overall length

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2005-2007 KTM MOTORCYCLE REPAIR MANUAL

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Filed Under (KTM) by admin on 21-11-2010

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Adjustments -Take notice of the position of the compression adjustment 1 ! -Count the amount of clicks by turning the adjustment screw clockwise till fully closed. -Remove the rubber cap out of the axleclamp. -Take notice of the position of the rebound adjustment 2 ! -Count the amount of clicks by turning the adjustment screw clockwise till fully closed. -For the standard position see setting list. Position of the compression and rebound adjustment -Set the rebound position 1 , see KTM-Owners manual. -Assemble the rubber cap. -Set the compression position 2 , see KTM-Owners manual. 1 2 2-22 Repair manual WP Fork “Closed Cartridge” Art.No.: 3.211.199-E Explanation of the spring preload -Total spring length without the spacers, see chapter inspection of the spring! -Spring length with spacers 1 , see setting list. -Spring with the spacers. 1 . -The spring is assembled in the front fork leg. NOTE: the distance of “B” is less then the length of “A”. A – B = Spring preload A 1 1 B 2-23 Air release screw -Place the motorcycle on the stand. NOTE: the front wheel must be lift of the floor! -Unscrew the air release screw 1 of the screw cap on top of the front fork and tighten after approx. 10 seconds the air release screw. Recommended periodic maintenance and inspection of the 4860 SX/SXS/SMR front fork 1 A 100 liter fuel consumption is equivalent to approx. 15 operating hours Clean dust scrapers (after 1 hour) Bleed fork legs regularly – after every cleaning Check the inner tubes on scratches / leakage Visual check of damaging of the outer-tubes / replace if necessary Complete service without disass. the closed cartridge of the fork Complete service including the closed cartridge of the front fork Dismounting the fork -Place your motorcycle on a stand. -Notice the position of the front fork in the triple-clamps. NOTE: To remove the front fork. Read your KTM Instruction Manual or Workshop Manual. 3-3 Mounting the fork -Clean the innerside of the triple-clamps with brake cleaner. -Slide both fork legs into the triple-clamps. NOTE: Pay attention to the position of the fork legs. Standard riding height! NOTE: The maximum riding height is the level of the second groove! -Tighten the middle bolt of the lower triple clamp to a torque of 17 Nm! -Tighten the first bolt of the lower triple clamp to a torque of 17 Nm! -Tighten the third bolt of the lower triple clamp to a torque of 17 Nm!

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KTM ATV 525 XC specification

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Filed Under (KTM) by admin on 12-11-2010

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Engine ] Pure power for Enduro enthusiasts. The power of the 525 XC is the indisputable benchmark in the ATV Enduro sector. Its acceleration and top speed cast a shadow over all its predecessors. Variable ignition curves and perfect maintenance features like simple valve play adjustment and the removable clutch cover are even further highlights of the XC engine that make the KTM Enduro quads so superior. First Oil Filling for all KTM Engines. [ CarburEttor ] The Keihin carburettor, which has been proven multiple times in racing, with 39 mm and the Throttle Positioning System guarantees a uniform, forceful power delivery in all speed ranges. It ensures an unrivalled response behavior and perfect service-friendliness at all times. [ StartEr ] Packed in a space-saving manner into the free space behind the cylinder head, the small, light electric starter motor is ready for use. It brings every KTM ATV up to speed reliably and comfortably even when racing becomes hectic. [ rEar SuSPENSIoN ] Premium-quality ÖHLINS suspension components specially designed for tough Enduro use are provided as standard – both at the front and the rear. Easy to adjust, they guarantee optimal tuning for the most varied of terrains. Another highlight: the front and rear spring travel of 275 mm and 272 mm respectively is 100 % trend-setting for an Enduro ATV! [ alumINIum SubFramE ] The rear subframe is made of aluminium and is extremely light and easy to remove. [ FramE ] The lightweight, extremely durable frame sets the benchmark in the quad racing segment and is made of high-strength, powder-coated Chromoly steel. [ haNDlEbar ] An ultra-durable tapered aluminium Magura® handlebar comes standard that is four-position adjustable to suit your preferred ergonomics. Further highlights are the functional and individually adjustable operating levers for brake and hydraulic clutch. In addition, the chassis has an integrated mount for a steering damper – available as a PowerPart accessory. [ CurvED raDIator ] Best cooling by means of its curved shape and the resulting maximized surface area. [ rImS / tIrES ] MAXXIS Razr tyres on light, stable DWT aluminium rims. [ ExhauSt ] The powerful XC silencer is made of light-weight aluminium.

Vespa GTS Super Specification

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Filed Under (Vespa) by admin on 11-11-2010

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Gts super 300 ie Gts super 125 ie s 125cc s 50cc Gts 250 ie Gts 125cc LX 125cc LX 50cc 2 stroke Engine Single-cylinder, catalised, QUASAR 4 stroke, 4 valve electronic injection Single-cylinder LEADER 4 stroke with electronic injection Single-cylinder LEADER 4 stroke Single-cylinder HI-PER 2 stroke Single-cylinder, catalised, QUASAR 4 stroke, 4 valve electronic injection Single-cylinder, catalised, LEADER 4 stroke, 4 valve Single-cylinder LEADER 4 stroke Single-cylinder HI-PER 2 stroke Capacity 278cc 124cc 124cc 50cc 249cc 124cc 124cc 49cc Power 16.4 kW / 7500 rpm 10.5 Kw / 9500 rpm 7.65 Kw / 8250 rpm 3.2 Kw / 7500 rpm 15.7 Kw / 8500 rpm 7.65 Kw / 8250 rpm 7.65 Kw / 8250 rpm 2.5 Kw / 8500 rpm Max Torque 22Nm / 6500 rpm 12 Nm / 8000rpm 9.6 Nm / 7250 rpm 4.4 Nm / 6500 rpm 20.1 Nm / 6500 rpm 9.6 Nm / 7250 rpm 9.6 Nm / 7250 rpm 3.3 Nm / 6500 rpm Cooling Liquid Liquid Forced Air Forced Air Liquid Liquid Forced Air Forced Air Starter Electric Electric Electric and kick starter Electric and kick starter Electric Electric Electric and kick starter Electric and kick starter Transmission Automatic twist and go Automatic twist and go Automatic twist and go Automatic twist and go Automatic twist and go Automatic twist and go Automatic twist and go Automatic twist and go Front Suspension Single arm, dual chamber hydraulic shock absorber with coaxial spring Single arm link with coil spring and double hydraulic shock absorber Single arm link with coil spring and double hydraulic shock absorber Single arm link with coil spring and double hydraulic shock absorber Single sided trailing link with hydraulic shock absorber Single sided trailing link with hydraulic shock absorber Single sided trailing link with hydraulic shock absorber Single sided trailing link with hydraulic shock absorber Rear Suspension Two dual effect shock absorbers with adjustable preload Coil spring and double hydraulic shock absorber Coil spring and double hydraulic shock absorber Coil spring and double hydraulic shock absorber Twin hydraulic shock absorbers with preload adjuster Twin hydraulic shock absorbers with preload adjuster Hydraulic shock absorbers with preload adjuster Hydraulic shock absorber Front Brake ø 220mm disc brake 220mm disc brake ø 200mm disc brake ø 200mm disc brake ø 220mm disc brake ø 220mm disc brake ø 200mm disc brake ø 200mm disc brake Rear Brake ø 220mm disc brake 220mm disc brake ø 110mm drum brake ø 110mm drum brake ø 220mm disc brake ø 220mm disc brake ø 110mm drum brake ø 110mm drum brake Front Tyre Tubeless 120/70-12″ Tubeless 120/70 – 12″ Tubeless 110/70 – 11″ Tubeless 110/70 – 11″ Tubeless 120/70-12″ Tubeless 120/70-12″ Tubeless 110/70 – 11″ Tubeless 110/70-11″ Rear Tyre Tubeless 130/70-12″ Tubeless 130/70 – 12″ Tubeless 120/70 – 10″ Tubeless 120/70 – 10″ Tubeless 130/70-12″ Tubeless 130/70-12″ Tubeless 120/70 – 10″ Tubeless 120/70-10″ Running weight 158kg 158kg 114kg 96kg 151kg 145kg 114kg 96kg Length/Width/Height 2230mm / 755mm / 1170mm 1930mm / 755mm / 1930mm 1770mm / 740mm / 1140mm 1755mm / 740mm / 1140mm 1930mm / 755mm / 1170 mm 1940mm / 755mm / 1180 mm 1770mm / 740mm / 1140mm 1755mm / 740mm / 1140mm Fuel Tank Capacity 9 litres 9 litres 8.5 litres 8.5 litres 9.2 litres 10 litres 8.5 litres 8.5 litres Emmissions Euro 3 Euro 3 Euro 3 Euro 2 Euro 3 Euro 3 Euro 3 Euro 2 Colours Rosso Dragon Nero Lucido Montebianco Rosso Dragon Nero Lucido Montebianco Taormina Nero Lucido Montebianco Taormina Nero Lucido Montebianco Marrone Terra Di Toscana Bronzo Perseo Nero Vulcano Blu Midnight

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KTM 250/ 300/ 380 SX,MXC,EXC ENGINE REPAIR MANUAL

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Filed Under (KTM) by admin on 12-11-2010

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Repair manual KTM 250 / 300 / 380 Art No 3206004 -E 2-2C main jet jet needle jet needle air control screw idle adjusting screw idle jet throttle valve Idling range A Operation with closed throttle valve. This range is influenced by the position of the air control screw 1 and the idle adjusting screw 2 . Only make adjustments when the engine is hot. To this end, slightly increase the idling speed of the engine by means of the idle adjusting screw. Turning it clockwise produces a higher idling speed and turning the screw counterclockwise produces a lower idling speed. Create a round and stable engine speed using the air control screw (basic position of the air control screw = open by 1.5 turns). Then adjust to the normal idling speed by means of the idle adjusting screw. Opening up B Engine behavior when the throttle opens. The idle jet and the shape of the throttle valve influences this range. If, despite good idling-speed and part-throttle setting, the engine sputters and smokes when the throttle is fully opened and develops its full power not smoothly but suddenly at high engine speeds, the mixture to the carburetor will be too rich, the fuel level too high or the float needle is leaking. Part-throttle range C Operation with partly open throttle valve. This range is only influenced by the jet needle (shape and position). The optimum part-throttle setting is controlled by the idling setting in the lower range and by the main jet in the upper range. If the engine runs on a four-stroke cycle or with reduced power when it is accelerated with the throttle partly open, the jet needle must be lowered by one notch. If then the engine pings, especially when accelerating under full power at maximum engine revs, the jet needle should be raised. If these faults should occur at the lower end of the part throttle range at a four-stroke running, make the idling range leaner; if the engine pings, adjust the idling range richer. Full throttle range D Operation with the throttle fully open (flat out). This range is influenced by the main jet and the jet needle. If the porcelain of the new spark plug is found to have a very bright or white coating or if the engine rings, after a short distance of riding flat out, a larger main jet is required. If the porcelain is dark brown or black with soot the main jet must be replaced by a smaller one. mixture too rich: too much fuel in proportion to air mixture too lean: not enough fuel in proportion to air 1 2 OPERATING RANGES OF THE CARBURETOR 2-3C Carburetor adjustment Basic information on the original carburetor setting The original carburetor setting was adapted for an altitude of approx. 500 meters (1600 ft.) above sea level, and the ambient temperature of approx. 20°C (68°F), mainly for off-road use and central European premium-grade fuel (ROZ 95 MOZ). Mixing ratio 2-stroke motor oil : super fuel 1:40 – 1:60. Basic information on a change of the carburetor setting Always start out from the original carburetor setting. Essential requirements are a clean air filter system, air-tight exhaust system and an intact carburetor. Experience has shown that adjusting the main jet, the idling jet and the jet needle is sufficient and that changes of other parts of the carburetor will not greatly affect engine performance. RULE OF THUMB:

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