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YZF 750R poor running


pdmtor
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Hello, I've got 1995 YZF 750R (import) don't know where from though.. doesn't seem to want to rev above 9-10k without spluttering and missing, idles rough as well but goes great in between..? Only recently got the exup working, has improved mid range and not so much of a flat spot at 3k, new plugs and caps, (they were shorting) but still hasn't made much of a difference, and carbs have been balanced..alledgedly

Anyone out there struck this before or no of any reasons and cures...? i'm stuck! cheers Pete

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Hello, I've got 1995 YZF 750R (import) don't know where from though.. doesn't seem to want to rev above 9-10k without spluttering and missing, idles rough as well but goes great in between..? Only recently got the exup working, has improved mid range and not so much of a flat spot at 3k, new plugs and caps, (they were shorting) but still hasn't made much of a difference, and carbs have been balanced..alledgedly

Anyone out there struck this before or no of any reasons and cures...? i'm stuck! cheers Pete

has it got a dyno jet on it ? are the carbs set corectly? if its an import depending on where its come from has the carbs got the correct jetting ?

when was the valve shims done last ?

might be none of these things but might be worth doing some cheaking

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valve clearances a defo mine well out about a year ago

but not a job if your not very clued up..

cab balance is a good start best thing to do is get it

on a dyno and let some one do that..

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