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HELP!!!!!! clone won't rev over 4400rpms and plug carboned
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DrChip
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Joined: 08 Aug 2008
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Location: Atlanta, GA

PostPosted: Mon Oct 06, 2008 11:03 am    Post subject: HELP!!!!!! clone won't rev over 4400rpms and plug carboned Reply with quote

have other great minds working on it, but have the day off to do final prep of the kart.

Was doing the same at the track yesterday!

Jetted too rich?

Wants full choke to start each time, even when engine hot.

Thanks all cb
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Michael Jackson



Joined: 11 Apr 2006
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Location: Lithia Springs Ga.

PostPosted: Mon Oct 06, 2008 11:27 am    Post subject: Reply with quote

Need more information. Have you rejetted it? They all reguire the choke to start usaually hot or cold. Throttle opening all the way? With a pipe and stock air filter they don't need a huge jet in them just a couple of sizes larger. Each engine seems to have a sweet spot but takes alittle time to find. I thought mine was floating the valves but finally figured out it had too large of a jet in it. It did the same with a stock jet. With several outings and frustation I finally found what it wanted.
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DrChip
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Location: Atlanta, GA

PostPosted: Mon Oct 06, 2008 1:34 pm    Post subject: Reply with quote

Have an 85 jet in it. Will order 70, 80 and 82 and try that. Thanks cb
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John Wehrheim
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Joined: 18 May 2006
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PostPosted: Mon Oct 06, 2008 2:30 pm    Post subject: Reply with quote

In my opinion this is why you are not able to rev. Others are more experienced in jetting these 4 cycles than I am, but I believe depending on the weather between 74 - 78
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nuthin fancy



Joined: 28 Apr 2007
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PostPosted: Mon Oct 06, 2008 3:31 pm    Post subject: Reply with quote

Hey, M.J.
I do believe that John W. HAS BEEN CLONED
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John Wehrheim
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PostPosted: Mon Oct 06, 2008 4:59 pm    Post subject: Reply with quote

Funny Frank!!
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Rick



Joined: 29 Nov 2006
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PostPosted: Mon Oct 06, 2008 6:51 pm    Post subject: Reply with quote

Just buy another one Smile
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Michael Jackson



Joined: 11 Apr 2006
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PostPosted: Wed Oct 08, 2008 9:31 am    Post subject: Reply with quote

70 is stock size. 85 is used with a aftermarket air filter. You can also melt solder into that 85 and drill it out with numbered drills if you have them to find out what works. You are looking for @ .028-.0295 size or a 76 jet in most cases. Some engines will run with a bigger jet and some won't. A lot depends on the E tube which varies from engine to engine.
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Daniel White



Joined: 05 Jun 2007
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PostPosted: Wed Oct 08, 2008 9:51 am    Post subject: Reply with quote

Seems like those clones are a pain the arse. Just buy a Rotax. Very Happy
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Mike Pugh
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Joined: 15 May 2006
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PostPosted: Wed Oct 08, 2008 10:29 am    Post subject: Reply with quote

Quote:
Seems like those clones are a pain the arse. Just buy a Rotax.

Or buy 30 or so clones for the same price and chunk the 2 or 3 that will not run. Laughing
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