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Post by Chrisb on Apr 21, 2010 17:28:35 GMT 1
a question for a friend with a Cosa..... any ideas ?
it runs really bad ( no power, boggy engine ) below 3000 rpm unless he partially covers the carb air intake .... standard (cleaned) carb, main jet, exhaust, new plug,cylinder head looks nice and tight no leaks
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Post by paul on Apr 21, 2010 18:46:12 GMT 1
dodgy choke......
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Post by brads on Apr 21, 2010 21:35:34 GMT 1
Aye
Choke,, like the toonie says
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Post by paul on Apr 22, 2010 11:10:26 GMT 1
the thing with the cosa choke is that its automatic and really a piece of shite.... Hard to find spares as well.
What most people do is fit the carb of a px(200 or 125 depending on the model of cosa) and rig up a pull coke under the seat or using a lammy choke handle on the frame.......
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Post by Chrisb on Apr 22, 2010 12:10:39 GMT 1
cheers Lads ... i'll pass the message on , see how he gets on
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Post by goldeneye on Apr 28, 2010 18:44:01 GMT 1
the cosa choke can stick . and being automatic, cant free itself. have you tried the secondary airfilter under the seat? try removing that. or take all airfilters off, and jet like a P200 (Be3/160/116) and see what it runs like. my old Cosa (yes ive had 3 of the buggers!) had a P200 carb on, with a hole drilled in the panel, and a bit of wire and a duffel coat toggle as the choke! it was just me work scooter, and cost me 100 quid! and it was a 200! i might have the remnants of a cosa 200 carb that you can have for nowt, if its any good to ya? and two pairs of brand new brake shoes i"ll let go for a tenner (they cost £45 new!)
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Post by Chrisb on Apr 28, 2010 21:47:08 GMT 1
cheers Goldeneye, the boys in Germany , so i couldn't get it to him .... he's gone and ordered a new carb for it anyway... see how he gets on
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Post by Chrisb on May 17, 2010 20:37:16 GMT 1
mates got his scoot running fine now .... he ended up fitting new stator and carb...... cheers for the suggestions
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