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krp44994 · 06-14-2009

A friend asked me to look into running/performance issues with his 98 Bayou 220. Starts and idles cleanly, On acceleration, and pushing the throttle, it hesitates and cuts out. Today, for kicks, I actually ran it with choke on and it ran great with no hesitation on hard acceleration and at speed. Of course it would not run at idle with choke on. I am guessing that the main jet is either clogged or not set properly and the idle jet is good to go. (Hence it running great at idle) Therefore running with the choke ON enriches the air/fuel ratio such that it runs great. My plan is to disassemble the carb and clean/inspect and re-set everything. I purchased the Haynes manual and I am very mech. inclined with cars/equipment - but this is my first bike/4 wheeler effort. Can anyone give me some good advice on cleaning and set-up, good diagrams,what to look for, etc before I tear the carb down? Many thanks in advance!

PS: Per the owner, the carb was recently "rebuilt" by an expert friend who said it had to be the head gasket. Which I just replaced at the owner's insistance - made no difference in performance.

06-14-2009	#1 (permalink)
krp44994 Newbie Join Date: Jun 2009 Posts: 10	98 Bayou 220 Carb question? A friend asked me to look into running/performance issues with his 98 Bayou 220. Starts and idles cleanly, On acceleration, and pushing the throttle, it hesitates and cuts out. Today, for kicks, I actually ran it with choke on and it ran great with no hesitation on hard acceleration and at speed. Of course it would not run at idle with choke on. I am guessing that the main jet is either clogged or not set properly and the idle jet is good to go. (Hence it running great at idle) Therefore running with the choke ON enriches the air/fuel ratio such that it runs great. My plan is to disassemble the carb and clean/inspect and re-set everything. I purchased the Haynes manual and I am very mech. inclined with cars/equipment - but this is my first bike/4 wheeler effort. Can anyone give me some good advice on cleaning and set-up, good diagrams,what to look for, etc before I tear the carb down? Many thanks in advance! PS: Per the owner, the carb was recently "rebuilt" by an expert friend who said it had to be the head gasket. Which I just replaced at the owner's insistance - made no difference in performance. Last edited by krp44994 : 06-15-2009 at 12:00 AM. Reason: Adding some info.