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Join Date: Nov 2007
Location: Chandler, Arizona
Since someone "worked" on your carbs, I strongly suspect that is where the problem is. I am not much of a believer in coincidences. I suspect "messed with" rather than "rebuilt" is probably more accurate in this case. There are a lot of "mechanics" out there who could do a fine job messing up motorcycle carburetors. Also the symptoms point to the carbs, specifically fuel starvation. Unfortunately there can be a lot of causes for this, and pinning it down online can be difficult. How does the bike idle? Does it pop and sputter at higher speeds, or just won't go any faster? Does it just hit a limit, or does it surge at top speed, constantly slowing down and speeding up? Check and make sure the throttle is opening the carbs all the way. With the throttle all the way open, grab a hold of the throttle shaft o the carb (the one with the spring on it) and see if you can turn it further.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike