| Author | Message | ||
     Sanchez |
I got an S1 with a Mikuni, a 1250 kit, a Buell race intake, a Vance & Hines pipe, and some other stuff on it. I'm having trouble making it idle right. I dial in the idle using the adjuster then blip the throttle or ride for a short distance, and it settles down 500+ rpm higher or lower than where I set it. It's either so low the engine dies or it races. Last night I took the choke off after warming it up for a minute, and it idled beautifully at 1100 rpm for a couple of more minutes while I put my gear on and then dropped down under 500 rpm and died. I started the bike back up, adjusted it back to 1100 rpm, and rode off. At the next traffic light, it was up to 1500 rpm. Things I've tried: - Sprayed WD-40 around the intake manifold gaskets (no detectable leaks) - Replaced the VOES vacuum line - Adjusted the idle air screw - The 22.5 pilot jet that came in the carb was too lean (based on how far I had to turn the air screw in to make the motor stumble), so I jumped up to a 30. That one's too rich. Both exhibit the same behavior. - Ensured the throttle cables aren't binding If I get the pilot jet right, could that fix the problem? Maybe the VOES unit itself is leaking? Any other ideas? | ||
| The4ork |
could it be your float sticking? WD40 isnt what i would use to find a vac leak, starter fluid is better. although spraying that around a hot air cooled cyl, not sure if the flash point is high enough to do that safely, maybe before its warmed up | ||
| Sanchez |
The float seemed like it was in good shape. It moved freely, and it was in exactly the right position when I measured it. I did also try some carb cleaner in addition to the WD40, but I didn't get a result with it either. | ||
| Road_thing |
I'd try disconnecting the VOES and plugging the vacuum port; if it idles at a consistent speed with the VOES disconnected, it's probably the switch. Could you expand on "some other stuff on it"? Is any of the "other stuff" engine-related? rt | ||
| Sanchez |
I'll give that a try. The only other engine mod is a TwinTec ignition module. It controls the timing advance in response to the VOES signal. | ||
| Sanchez |
Ok, plugging the VOES hose didn't fix it. The Mikuni tuning guide says the wrong size pilot jet can cause a poor idle, so I guess I'll just have to order another couple of jets and try them out. |
