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Old 10-06-2015, 11:55 AM
crassius crassius is offline
Motorized Bicycle Elite Member
Join Date: Sep 2012
Location: USA
Posts: 2,784
Default Re: Idles strong at first, then not so much

first thing to consider is whether engine has run long enough to get the rings seated well - idle & overall power will be iffy till then

if it is run in already, then I'd guess that your carb is a bit too rich at idle (a cold motor likes a richer mixture than a warm motor) - I have had motors that needed the idle adjusted when warm, and needed the throttle feathered a bit to keep it running for the first few minutes when cold because there was no happy medium setting for idle
Sometimes I sets and thinks, sometimes I jes sets.
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