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Post by scootlife on Jun 10, 2015 19:28:30 GMT -5
I am having an issue...when I start the scooter it starts right up... then after it is warmed up it will rev longer than usual when given a little throttle...all on the center stand. Seems like it may be getting too much fuel? It also idles very rough. maybe carb needs a cleaning?
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Post by humanshield on Jun 10, 2015 20:59:05 GMT -5
Is this the scooter with BBK and the 24mm carb?
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Post by scooterpimp on Jun 11, 2015 6:01:01 GMT -5
Cleaning , ajusting or tuning
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Post by scootlife on Jun 11, 2015 6:26:25 GMT -5
Is this the scooter with BBK and the 24mm carb? Yes it is. I will be trying to clean today. Went through some adjusting with no success. Maybe a pilot jet clogged? |
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Post by scootlife on Jun 11, 2015 7:15:10 GMT -5
I have cleaned it and tested. It rides well. Same speeds, top and low end, spark plug color looked good. But when I am idling and give it a little gas, it revs up to 5000 rpm then lowers back down. Any ideas of what is causing that.
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Post by scootlife on Jun 11, 2015 9:39:29 GMT -5
It will even rev high without giving any throttle. Can't figure it out
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Post by Fox on Jun 11, 2015 11:39:57 GMT -5
Erratic idle usually points to a vacuum leak somewhere. Rough idle usually points to a tight valve. Tight valves are basically a vacuum leak.
Cracked spark plug is a vacuum leak
Loose spark plug is a vacuum leak.
Loose intake is a vacuum leak.
Bad intake/head seal is a vacuum leak
Cracked intake is a vacuum leak
Cracked vacuum line is a vacuum leak
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Post by scootlife on Jun 11, 2015 12:24:38 GMT -5
Thanks! I'll check it out
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Post by scootlife on Jun 12, 2015 16:16:07 GMT -5
My intake spacer I created from a cutting board...melted. This caused a vacuum leak as mentioned above. Thanks for the help! Replaced spacer and now runs perfect!
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Post by Fox on Jun 12, 2015 17:50:59 GMT -5
Yeah I read that post Brent made about using a cutting board for a spacer but I think it was meant for a 2 stroke application where the intake mounts to the engine case not the cylinder head but maybe not. Maybe it's s special type of cutting board. I know that installing a paper type gasket between the head and spacer reduces heat transfer but if the plastic used isn't up to snuff then it'll probably still melt where the studs pass through it.
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