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no crank.possible cam missalignment?

Posted: Thu Jul 12, 2012 8:25 pm
by DTARS
so i got this 1987 yamaha fzr1000 its not stock imo. 100cc overbore ,n20,air shifter ect.

i received the bike with the cams allready out of it. and i am unsure if they are stock or not.

i downloaded the service manual for the 87 fzr1000 and installed the cam per spec. set crank to tdc aligned cam dots with the lines on the caps .
and when i tried to crank it over nothing i can hear the starter engaging . checked volts and load on battery its fine. so i pulled the starter and cleaned the brushes and bench tested worked fine. but it still wont crank over the damn motor.

so i pulled the cams and cranked it holding up the timing chain and it cranked fine. reinstalled cams and no crank at all.

could it be possible that the cam gear wheels were removed and placed in a different position?
any help would be great. Thanks

Re: no crank.possible cam missalignment?

Posted: Thu Jul 12, 2012 8:46 pm
by Burtonrider10022
It's toast, I'll give you $100 for it. ;-)













On a serious note, I have nothing of value to offer this thread. :whistle

Re: no crank.possible cam missalignment?

Posted: Fri Jul 13, 2012 5:27 pm
by DTARS
Does anyone have cam lobe measurements for stock cams. Or picture of the cam gear dot in relation to the cam

Re: no crank.possible cam missalignment?

Posted: Sat Jul 14, 2012 8:28 pm
by DTARS
so i have figured it out, the cams were out of sync. and im pretty sure these are aftermarket cams. i noticed a small dot punched in the cam its self so i aligned it to that. the marks on the cam gear were off based on the dot punched in the cam. and i also noticed the cams had numbers stamped on them . so i installed the cams based on the dot punched in the cam and it cranked over no problem .

here is the dots on the cams Image
here is the numbers on the cams Image Image

and the alignment marks on the cams to the cam caps Image

and what the cams should look like on tdc #1 cyclinder Image

so hopefully this helps someone in the future.

no crank.possible cam missalignment?

Posted: Sun Jul 15, 2012 1:21 am
by Redoliander
Glad you figured it out and posted some pics. They are always useful.