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tc330

Joined:

Mar 11

Posts: 171

tc330 says:

Revving moped

My mate's got a 1997 honda sgx50 sky moped. It has  just developed a problem where by it will go from tickover to screaming revs without touching the throttle!

Using a donor bike which runs fine, we have swapped carb, slide, throttle cable and auto choke. Problem stays on original bike.
Any ideas anyone?

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  • Posted 2 years ago (20 April 2013 16:24)

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kcmc

Joined:

Jan 08

Posts: 7737

kcmc says:

Honda SGX 50 SKY 1997

Hi tc330,jeez man a 16 year old two smoke mophead:shock:

Sounds like the diaphragm in the fuel tap may have go west allowing neat fuel into the crankcase bypassing the carb,could also have a air leak compounding the problem?like in the reed valve gaskets,or maybe a crack in the heat insulator between the carb face and intake manifold(check the O'ring is sealing good as well).Good Luck

KCMC:tongue:

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tc330

Joined:

Mar 11

Posts: 171

tc330 says:

Fuel tap......

Never thought of that one, I did look at seals and gaskets and all seemed ok......but like you say it is an oldie :wacko: It's a training school bike so gets a hard life.

Thanks for advice mate, have a good one - or if that don't happen have a cold one :biggrin:

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tc330

Joined:

Mar 11

Posts: 171

tc330 says:

Sorted

Turned out to be crank seal. Thanks for your help  KCMC.:biggrin:

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