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Post by rayupton on Sept 12, 2006 12:25:36 GMT
Hi, has anyone got any ideas on this problem?
My daughter has got a Baotian BT50QT-11, it's done 300 miles & has been de-restricted. Goes great, except sometimes, after it's been going for a number of miles, around 10, the scoot nearly dies, she can keep it going by revving it, but there's little power. Then after a while it picks up again and carries on okay.
Any ideas welcome.
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Post by bishrfc on Sept 12, 2006 15:09:16 GMT
Hi I have a similar problem and would also like some advise as to
what the problem is!!!
Regards
bishrfc
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Post by Macrofeet on Sept 15, 2006 15:40:49 GMT
easy
Sounds to me 100% like a valve problem the tappet/valve gaps need setting with a feeler gauge to 0.06
most likly exhaust valve to tight
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Post by rayupton on Sept 16, 2006 20:28:38 GMT
Not so easy, unfortunately.
Checked the valves. Both around .06. The exhaust was a fraction over so tightened it up.
Fuel filter was fitted the wrong way, with the flow arrow pointing back to the tank! Hasn't made any difference though.
After about 4 miles it starts to hesitate. If I throttle off it will chug along at 20 and eventually will pick back up again - for a short while. Very frustrating. Has no one had this problem?
Seems like a fuelling problem. I guess the carb will have to come off next. Not sure what to do with it though.
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Post by Simar on Sept 16, 2006 20:58:46 GMT
Hm... sounds like it could be crap in the fuel, change the fuel filter if it has one and if possible clean out the tank too.
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Post by Macrofeet on Sept 17, 2006 9:46:36 GMT
in that case i'm thinking its a spark plug or fuel mixture problem Set the mixture screw 2 1/2 turns from tight and check the plug is clean and gap is correct dont think it matters a great deal which way round the filter is i'd replace the filter anyway as its tiny, they sell fuel filters most moter shops most common is clear plastic with a yellow filter like this one which works well with these scoots but any small filter will do cgi.ebay.co.uk/MINIMOTO-MINI-MOTO-HIGH-FLOW-PERFORMANCE-FUEL-FILTER_W0QQitemZ8020460478QQihZ019QQcategoryZ25640QQssPageNameZWD1VQQrdZ1QQcmdZViewItemwhile your there look for a new ngk plug as well as the one that comes with is not so good NGK CR7HSA or ngk C7HSA is the correct plug for most of these scooters |
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Post by rayupton on Sept 20, 2006 13:00:52 GMT
Right, I decided to hit it with everything. Drained the carb & tank, put in a new fuel filter, put in a new plug CR7HSA - the one with the resistor.
And, the crucial one I think, checked the mixture - it was 4 1/4 turns out. So I set it to 2 1/2 turns, and it seems to have sorted it! Thanks Macrofeet have some Karma!
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