YAMAHA V-Star 1100 Carburetor Bowl Screw Repair and Removal After Stripping and Pilot Cap Removal

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Filed Under (Yamaha) by admin on 19-01-2012

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When I first started working on bike many years ago, I learned the danger of stripping the heads of Philips screws when removing or installing them on motorcycles. I remember the two worst screws were the casing side-cover aluminum screws and carburetor bowl screws. I think I tried every method of screw removal after they were stripped. Vice grips, better tipped screwdriver, hammer, drill, and other tools were used. One way I learned to remove stripped screws is to re-make the Philips head into a flathead screw. Cutting a slot in the top of the screw and then use a flat-head screwdriver to remove the screw. On some parts this technique can work, other parts and screws it may not. The Philips screws on the bottom of the V-Star carburetor bowls are VERY prone to stripping. In fact, I will not start a carburetor cleaning without new hex head screws to replace the original Philips bowl screws. Replace the bowl screws for yourself if you keep the bike, or for the next rider that will appreciate the hex-head screws when they clean the carburetors. Not many other parts on a V-Star have screws that are prone to stripping. This documentation is to help riders with motorcycle maintenance. Some riders will find themselves with the problem of removing stripped screws. A carburetor cleaning can quickly double in time when you realize the hardest part of the job is removing bowl screws after they strip. And then realizing you do not have the replacement hex-head screws available and must now go to the hardware store.

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Yamaha WR motorcycle ProEFX 12V Hot Start Installation

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Filed Under (Yamaha) by admin on 06-01-2012

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1. Remove seat, tank and shrouds. Remove existing hot start lever, cable and valve from the carburetor. 2. Tip: Clean all dirt from hot start bore and mating surfaces on the carburetor body with gas and a q-tip. 3. Tip: Use a small amount of Teflon tape (one wrap) on the threads of the aluminum mounting nut to ensure a water tight seal. 4. Install the Pro EFX hot start valve in the hot start bore (as shown in picture), with return spring, impact washer and delrin plunger in place. • Tip: Installation of the solenoid valve may require temporary rotation of the carburetor away from the top engine mount bracket. • Install with the solenoid valve assembly disconnected from wiring harness. • Screw in by hand and finish tightening with needle nose pliers. Do not over-tighten. Solenoid valve assembly: 5. Mount activation switch on preferred handle bar location. Pictured on clutch side, in place of the stock kill switch.
6. Route wiring harness around steering column and down frame backbone. Insert battery leads through slot in rubber protective boot. (follow existing wiring to battery) 7. Connect positive (red) and negative (black) leads to motorcycle battery. 8. Connect male and female terminals to wiring harness on previously installed solenoid valve assembly. 9. Depress activation button and listen for valve actuation. Plunger should freely “snap” between open and closed position in hot start bore, as activation button is depressed and released. If you don’t hear the valve “snap” open and closed, follow the trouble shooting guidelines or call /email for support. 10. Maintenance: Periodically ensure proper tightness of solenoid valve in carburetor body as part of standard motorcycle maintenance. Keep the battery terminal connections free from corrosion.

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