Question about Motorcycles
I can get it to start and idle but - opening the throttle makes is cough and miss, - and it doesn't rev up, - and it doesn't get better after warmup Out of the box, it wouldn't idle (just died), but with careful throttle control I could start it and was able to ride for 5 minutes, coaxing the rpm's up to cruising speed. I increased the idle stop screw until it would keep running. - after a while, ti would not rev up at all, just would cough and miss. - "choking" the air intake makes it die, leading me to believe it may be running rich - no idle or high speed jets to adjust - main jet #82, idle jet #33 - passages and jets appear clean and clear - main CV needle has only one clip position, nothing to adjust there - CV slide moves by hand - lots of fuel in the bowl, vent line drains fuel when carb is tilted over - accelerator pump works (I see the jet of fuel) - maybe the auto choke is not closing? But problem is present warm or hot. What can I test on a CV carb (I'm a CV noobie)? - hand-choking? - observing if the CV slide rises when the throttle is opened? What can I adjust? - jet sizes - idle stop screw Thanks, /John
My 50cc scooter will idle at first and rev very well but wont idle what can this be
Posted on Mar 13, 2014
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Posted on Jan 02, 2017
You need to fix the fueling first - without fuel it won't run!
Your other problem sounds like an air leak - either the manifold or the carb. Check by spraying WD-40 or CRC at the manifold and carb join while the bike is running - if the revs change (either up or down) you have a leak.
Posted on Jun 29, 2009
First Make sure you have all new fresh gas,and new fuel filter,Then check the intake tube between the head and carb for cracks or leaks,And You'll need to go back through the carb again as this is a carb issue,But without doing the above first,a clean carb won't be clean for long.
Posted on May 17, 2009
Few suggestions(if not checked already):
Holed or incorrectly seated diaphram?
I Presume you have checked already the air correction and needle jets too.
Please get back to me if you require further asssistance.
Posted on May 27, 2010
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