sheeny7 Posted November 23, 2004 Share Posted November 23, 2004 hi ya all,i found this site and its great so joined straight away.thank god for the internet. any one help or had any probs before.ive got a yzf 750 and it has couple of problems.the engines holding on the revs when you let go of the throttle. but its not running on number 1 cyc properly either. carbs are balance right and does sound maybe a valve or ring problem or valve clearances. I am a car techician so fixing is not a prop but it always good to get a second hand opinion. And any one got a subframe for a yzf750!! THANKS Link to comment Share on other sites More sharing options...
cterror Posted November 24, 2004 Share Posted November 24, 2004 the engines holding on the revs when you let go of the throttle. but its not running on number 1 cyc properly either. carbs are balance right and does sound maybe a valve or ring problem or valve clearances. I am a car techician so fixing is not a prop but it always good to get a second hand opinion. And any one got a subframe for a yzf750!! THANKS first i would have suggested air-leak in intakemanifolds, but if you have balanced it, thats not the problem. it could be intake-valves if you have not checked valve-clearances then do it right away. the other thing it can be is that your cam-chain has jumped one sprocket or few. this sounds really stupid but i have seen an fzr600r with the symptoms above and when i opened it, the lait owner had changed the chain by himself and wrong.... id open the head if i where you. you can pre-check it with compression tester before opening anything. Link to comment Share on other sites More sharing options...
sheeny7 Posted November 24, 2004 Author Share Posted November 24, 2004 yes i did all the usual thing,air leaks,new plugs,and a good spark.that was my next job to check the value clearances then presure test to see if i had got a valve or set of rings gone. thanks alot like i said a second or third opinion is always good. Link to comment Share on other sites More sharing options...
cterror Posted November 25, 2004 Share Posted November 25, 2004 sorry i cant help you with the subframe... sold mine last summer. trye e-bay. i asked and got 30eur off my subframe. Link to comment Share on other sites More sharing options...
steve yzf Posted November 26, 2004 Share Posted November 26, 2004 Theres a subframe on e-bay now http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...7937581351&rd=1 Link to comment Share on other sites More sharing options...
sheeny7 Posted November 27, 2004 Author Share Posted November 27, 2004 well not sure if that was a good day.not had chance to do the valve clearance yet but did a pressure test and no sign of a valve gone. small amount of air leaking through the rings as you can hear through the oil filler cap but i'd say be a small amount as sum piston slack with it being cold. when engine is running you put your hand on each carb they all suck but not on the cyilinder which is the prob one. Link to comment Share on other sites More sharing options...
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