Post by Bronson7 on May 5, 2005 7:50:26 GMT -5
Well, my SR500H still won't go over 75 mph and is running way too lean. Stock exhaust is installed but was doing the same with the Supertrapp.
I've had the carb on and off half a dozen times. I've checked for good fuel flow, I've replaced all diaphragms, replaced the float needle/seat, cleaned, etc. I've set the fuel level higher, lower and in between. I've changed the main to a #280 (260 is stock). I've shaved .050" off the slide and raised the needle 1mm.The darn plug still stays white after all my 14 mile test rides. I've checked for a vacuum leak by plugging the port to the petcock and running it in the prime position, still no joy. I've sprayed carb cleaner on the intake manifold with it running at idle to check for a vacuum leak, still no joy. I've done everything I could do short of a dance around the bike with a rattle and chicken bones. A previous owner had changed the CDI, so I checked to see if the replacement was correct figuring the advance curve could be wrong. The unit it has now is a 3HI-51. The Yam parts listing shows a 3HI-50. I'm guessing the current one is an up-grade as it has a plastic vs. metal housing.
Anyone have anymore ideas before I spring for an aftermarket carb?
Bronson7
I've had the carb on and off half a dozen times. I've checked for good fuel flow, I've replaced all diaphragms, replaced the float needle/seat, cleaned, etc. I've set the fuel level higher, lower and in between. I've changed the main to a #280 (260 is stock). I've shaved .050" off the slide and raised the needle 1mm.The darn plug still stays white after all my 14 mile test rides. I've checked for a vacuum leak by plugging the port to the petcock and running it in the prime position, still no joy. I've sprayed carb cleaner on the intake manifold with it running at idle to check for a vacuum leak, still no joy. I've done everything I could do short of a dance around the bike with a rattle and chicken bones. A previous owner had changed the CDI, so I checked to see if the replacement was correct figuring the advance curve could be wrong. The unit it has now is a 3HI-51. The Yam parts listing shows a 3HI-50. I'm guessing the current one is an up-grade as it has a plastic vs. metal housing.
Anyone have anymore ideas before I spring for an aftermarket carb?
Bronson7
