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Old 06-19-2013, 01:43 AM
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mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: what did you do to your motor bike today?

Originally Posted by crassius View Post
#73 - .024" - .61mm

never even tried one that small, are you sure that isn't too lean to get up hills?
I run that size for last 4 years in one of my bikes with a very free flowing exhaust and a 32T sprocket on a 24" wheel now, I ride 30+ mile round trips with a 4 moderate hills along the way, spark plug runs nice medium chocolate brown and the engine only 4 strokes at very low speed with only small amount of throttle being used.

I worked this jet size up by trial of plug checking and it works great on 3 of my engines, never any lean issues at all with this jet size on my bikes.

I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
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