125 xrm carburetor tuning manual

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Tuning the HSR42/ 45 Carburetor

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Filed Under (Tips and Review) by admin on 31-10-2010

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your Mikuni HSR is fitted with the tuning parts we found to work with the great majority of engine performance modifications. However, the large number of differing exhaust systems and cams available makes it impossible to accommodate all possible combinations with one carburetor set-up. Your HSR will almost certainly run correctly on your engine without exchanging any parts. But, if it doesn’t, you may alter its tuning to suit your engine’s needs by following this guide. Some exhaust system designs strongly interfere with carburetor tuning. For instance, it is very difficult to get smooth and responsive carburetion through the entire rpm range with straight pipes and completely open exhausts. In addition, very small volume, small diameter mufflers are often ‘seen’ by the engine as straight pipes and present the same tuning difficulties. Very long duration cams often cause relatively poor running below about 3,000 rpm, depending upon the individual cam’s intake valve closing point. Such cams cause reverse airflow out the mouth of the carburetor (often called “reversion” or “standoff”) that can be mistaken for a carburetor tuning problem. Harley-Davidson Screamin’ Eagle performance parts are proven and predictable. If you have any doubts about a particular exhaust system, air cleaner or ignition, you may substitute the Harley Screamin’ Eagle parts as a “reality check.” When re-tuning is required, it usually involves small alterations to the idle and/or main system. The following pages supply enough information to make such alterations relatively simple. Please note that there is no point in attempting to tune any carburetor unless the engine is sound and in a good state of tune. If you have any doubts about the general condition of your engine, have it checked by your dealer or an experienced mechanic before attempting to fine-tune your Mikuni.

HSR Carburetor Total Kits Installation And Tuning Manual

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Filed Under (Tips and Review) by admin on 31-10-2010

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1. Disconnect the battery ground wire from the battery. 2. Turn the fuel petcock to the “OFF” position. 3. Elevate the rear of the fuel tank for better access to the carburetor area. 4. Remove the coil, horn or other devices on the left hand side of the engine to allow free access to the intake manifold bolts. 5. Remove the complete air cleaner assembly, including the backing plate. 6. Disconnect any vacuum hoses and the fuel hose from the stock carburetor. 7. Disconnect the choke cable from the frame. 8. Remove the stock carburetor. 9. Evo: remove the stock manifold. 10. Twin Cam: unplug MAP sensor, remove manifold and then remove the MAP sensor from the manifold. Installation: Intake Manifold: Twin Cam only: Install MAP sensor in Mikuni manifold. 1. Attach the Mikuni manifold to the engine. Align the manifold before tightening the bolts. The flange surface of the Mikuni manifold should be parallel with the front of the engine’s cam cover. Use a level or angle meter to check this. Tighten the manifold bolts. 2. Attach the rubber flange to the Mikuni manifold with the 5/16″x3/4″ bolts and washers. To ease installation, use liqiud detergent to lubricate the manifold seals. Choke: Evo: We recommend that you use the Mikuni choke cable that is furnished with the carburetor. However, you can use the stock Harley cable (’90-’99 models only) if you follow the Twin Cam choke cable instructions. Twin Cam: 1. Remove the Harley choke cable from the stock carb. 2. Remove the Harley spring and plunger from the Harley choke cable. 3. Remove the Mikuni spring and plunger from the Mikuni carburetor. 5. Install the Mikuni spring and plunger onto the Harley choke cable. Change nothing else; be sure to use the Harley plastic nut, not the Mikuni nut. 6. Install the new assembly into the Mikuni. Be careful to only gently tighten the plastic nut.

HSR Carburetor Total Kits Installation Instructions

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Filed Under (Mikuni) by admin on 31-10-2010

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Intake Manifold: 1. Install MAP sensor in Mikuni manifold (Twin Cam only). 2. Attach the Mikuni manifold to the engine. Align the manifold before tightening the bolts. The flange surface of the Mikuni manifold should be parallel with the front of the engine’s cam cover. Use a level or angle meter to check this. Tighten the manifold bolts. 3. Attach the rubber flange to the Mikuni manifold with the furnished 5/16″x3/4″ bolts and washers. Choke Cables: Mikuni & Harley-Davidson Route the cable with largest radius bends possible. Check the cable for free-play after installation. If there is no free-play, the engine may run rich and deliver poor performance or low fuel mileage. Harley Cable (Twin Cam Kits: 42-19, 45-4) : 1. Remove the Harley choke cable from the stock carb. 2. Remove the spring and plunger from the cable. 3. Remove the spring and plunger from the Mikuni. 5. Install the Mikuni spring and plunger onto the Harley choke cable. Change nothing else; be sure to use the Harley plastic nut, not the Mikuni nut (See Figure 1). Total Kit Installation Instructions The HSR series carburetors are precise yet durable instruments; however, like any other piece of fine equipment, they require correct installation and reasonable care to assure optimum performance and long life. Extra time spent during installation will pay off in both short and long term performance and reliability. This Mikuni HSR carburetor kit is designed to be a bolt-on application, and as such, is set-up and jetted properly for most applications. However, since Harley-Davidson motors are often highly modified, alternate tuning settings may be required. The Mikuni Tuning Manual helps make jetting alterations and adjustments an easy matter. NOTE: Carburetor Kits not designated as C.A.R.B. exempt, are not legal for motor vehicles operated on public highways in the state of California, or in any other states and countries where similar laws apply. WARNING NOTE: NOTE: WARNING CAUTION NOTE: NOTE: TK-2 6. Install the new assembly into the Mikuni carburetor. Be careful to only gently tighten the plastic nut. 7. Loosen the knurled plastic friction nut behind the choke knob and check for free-play (see Figure 2). Figure 1: Harley nut with Mikuni spring & plunger Figure 2: Choke cable adjustments Mikuni Cable (Evo Kits: 42-8, 45-2 & 45-3) : 1. Remove nut, spring and plunger from the Mikuni. 2. Install the nut, spring and plunger onto the cable. 3. Install the assembly into the Mikuni HSR carburetor. Be careful to only gently tighten the plastic nut. 4. Check for free-play. Adjust the cable as necessary. An optional choke cable mounting bracket is included in the Evo kits for custom installations. Carburetor Installation: 1. Insert the carb fully into the rubber flange, align with engine and tighten the clamp. 2. Slip the fuel hose onto the carburetor’s fuel fitting and secure with the enclosed hose clamp. NOTE: Some Twin Cam installations may require removal of a small amount of fin material from the cylinders to clear the float bowl. Throttle Cables The HSR carburetor uses stock 1990 and later Harley- Davidson cables. However, if your Harley is fitted with some other carburetor, you may need to purchase a set of cables. See your dealer for the correct cable set. 1. Route the throttle cables with large radius curves and so they do not interfere with other components. 2. Screw the cable adjusters together to make them as short as possible. 3. Connect the “close” cable first (see Figure 3). 4. Install the “open” cable next (see Figure 3). 5. Adjust the opening cable until the slide can be opened fully. Snug the adjuster lock nut. 6. Turn the handlebar to the right and adjust the throttle free-play with the closing cable adjuster to approximately 1/8″ (see Figure 4)

HARLEY DAVIDSON VRSC CHROME WHEEL KITS INSTALLATION MANUAL

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Filed Under (Harley Davidson) by admin on 18-03-2011

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Installation To prevent accidental vehicle start-up, which could cause death or serious injury, remove maxi-fuse before proceeding. (00251a) 1 WARNING 1 WARNING ® Kit Numbers 41279-04, 41282-04, 41463-05, 41467-05, 41633-05, 41634-05, 41640-05, and 41639-05 1 of 3 Figure 1. Rear Wheel Removal i02495 1. Axle (keep) 2. Axle adjuster (keep) 3. Axle nut (keep) 4. “E”-clip (keep) 5. Spacer (3) (keep) 6. Torx screw (5) (replace) 7. Brake disc (keep) 8. Wheel assembly (replace) 9. Valve cap (keep) 10. Compensator bowl (keep) 11. Compensator cushion (keep) 12.12 pt screw (5) (keep) 13. Lockwasher (5) (keep) 14. Sprocket assembly (keep) 1. Refer to the Service Manual and follow the MAXI-FUSE instructions to remove the right-side cover and maxi- fuse. Proceed to Step 2 for the wheel being replaced. Rear Wheel 2. See Figure 1. Remove the rear wheel per the REAR WHEEL, REMOVAL instructions in the Service Manual. 3. Disassemble, clean and inspect all parts to be re-used per Service Manual instructions. 4. Re-assemble all saved components to the new chrome rear wheel assembly. See REAR WHEEL, ASSEMBLY in the Service Manual. Do not re-use brake disc screws. Re-using disc screws can result in torque loss and damage to rotor and/or brake assembly. (00319b) 5. Fasten the brake disc to the valve stem side of the wheel using the Torx®screws from the kit. Install the compensator bowl with the 12-point screws and lockwashers saved earlier. 6. Install the new wheel to the rear fork. Refer to REAR WHEEL, INSTALLATION in the Service Manual. Proceed to Step 7. Front Wheel 2. See Figure 2. Remove the front wheel per the FRONT WHEEL, REMOVAL instructions in the Service Manual. 3. Disassemble, clean and inspect all parts to be re-used per Service Manual instructions. Mark the left and right brake discs so they can be re-installed to the same location. 4. Re-assemble all saved components to the new chrome front wheel assembly. See FRONT WHEEL, ASSEMBLY in the Service Manual. Do not re-use brake disc screws. Re-using disc screws can result in torque loss and damage to rotor and/or brake assembly. (00319b) 5. Using the Torx ® shoulder bolts from the kit, and the saved spring washers fasten the brake discs to the same side of the wheel from which they were removed. 6. Install the new wheel to the front forks per the FRONT WHEEL, INSTALLATION instructions in the Service Manual. Proceed to Step 7. Front and Rear Wheels 7. Refer to the Service Manual and follow the MAXI-FUSE instructions to replace the maxi-fuse and right-side cover. After servicing brakes and before moving motorcycle, pump brakes to build brake system pressure. Insufficient pressure can adversely affect brake performance, which could result in death or serious injury. (00279a) After servicing the brake system, test brakes at low speed. If brakes are not operating properly, testing at high speeds can cause loss of control, which could result in death or serious injury. (00289a) Maintenance and Cleaning Chrome parts must be maintained regularly to ensure that they keep their original shine and luster. 1. Clean heavily-soiled wheel surfaces using Harley Wheel and Tire Cleaner, part number 94658-98, applied with Harley Wheel and Spoke Brush, part number 43078-99. 2. Thoroughly clean chrome with a good quality chrome cleaner, such as Harley Bright Chrome Cleaner, part number 94683-99. 3. After cleaning and polishing, seal the finish with a good quality sealer such as Harley Glaze Polish and Sealant, part number 99701-84

SUZUKI GSX-R1000 SERVICE MANUAL

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

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Cover the throttle bodies to prevent anything from dropping into the engine. 1. Remove the front seat and disconnect the battery. (Refer to Service Manual, Page 8-8) 2. Lift up the fuel tank. (Refer to Service Manual, Page 5-3) 3. Remove the air cleaner box. (Refer to Service Manual, Page 5-14) 4. Remove and replace the ISC valve. (Refer to Service Manual, Page 5-25) NOTE: Since the ECM is also being replaced there is no need to perform the ISC valve preset operation. 5. Install the air cleaner box in reverse order of removal. (Refer to Service Manual, Page 5-14) 6. Lower the fuel tank. (Refer to Service Manual, Page 5-3) 7. Remove the upper seat rail plate. Disconnect and remove the ECM. (Figure 1) @ ISC Valve Mounting Screw Torque: 2.1± ±0.6 N.m (1.5± ±0.4 lb-ft) ! Carefully insert the ISC valve straight into the throttle body hole to prevent damaging the o-ring. Turn the ISC valve slightly to confirm that the o-ring has not twisted. Using the new screw provided in the replacement parts kit, make sure the screw is completely seated on the plate after the screw has been tightened to the specified torque. 4. Remove and replace the ISC valve. (Refer to Service Manual, Page 5-25) NOTE: Since the ECM is also being replaced there is no need to perform the ISC valve preset operation. ! Cover the throttle bodies to prevent anything from dropping into the engine. 1. Remove the front seat and disconnect the battery. (Refer to Service Manual, Page 8-8) 2. Lift up the fuel tank. (Refer to Service Manual, Page 5-3) 3. Remove the air cleaner box. (Refer to Service Manual, Page 5-14) REPLACEMENT PROCEDURE: 8. Install the new ECM in reverse order of removal. Apply thread lock to the upper plate mounting bolts when reinstalling the upper seat rail plate.

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