Da300EXer
06-19-2003, 01:21 PM
Ok, We just got my cousins 426 together and back in the frame. It has JE 426 piston, 10.8:1 compression. XR400 cam.
We put it together almost without a problem.......
Key word, almost!
We put the cam in, and we put it at Top Dead Center...
We put the cam lobes facing down....
We put the sprocket on, and we put the chain on the sprocket no problem.
Heres the almost....
When I put the cam chain tensioner back in and the cam chain was tight, the marks on the cam chain sprocket no longer lined up exactly....
It was not off by more than a whole link in the cam chain, so, I couldnt get it to be exact, it was either too far forward or too far backward, no matter what I did.
I left it too far backward, and put it together, just to see, becasue I didnt know what else to do.
Now it wont start. It cranks over and it pops, but it wont start. We tried it with an aftermarket CDI and the stock CDI, still no go. The battery is fully charged, we even tried jumping it, still no go....
We arent sure if the quad MAY have a timing advance key....... MAY, we dont know.....
Would that cause the timing marks to be off? What should we do? If it does?
If there is no timing advance key installed, what else is causing the marks to not line up? stretched cam chain? worn bottom cam chain sprocket?
Is the timing problem the reason the quad isnt starting?!?!
Any advice would be greatly appreciated! Thanks in advance
We put it together almost without a problem.......
Key word, almost!
We put the cam in, and we put it at Top Dead Center...
We put the cam lobes facing down....
We put the sprocket on, and we put the chain on the sprocket no problem.
Heres the almost....
When I put the cam chain tensioner back in and the cam chain was tight, the marks on the cam chain sprocket no longer lined up exactly....
It was not off by more than a whole link in the cam chain, so, I couldnt get it to be exact, it was either too far forward or too far backward, no matter what I did.
I left it too far backward, and put it together, just to see, becasue I didnt know what else to do.
Now it wont start. It cranks over and it pops, but it wont start. We tried it with an aftermarket CDI and the stock CDI, still no go. The battery is fully charged, we even tried jumping it, still no go....
We arent sure if the quad MAY have a timing advance key....... MAY, we dont know.....
Would that cause the timing marks to be off? What should we do? If it does?
If there is no timing advance key installed, what else is causing the marks to not line up? stretched cam chain? worn bottom cam chain sprocket?
Is the timing problem the reason the quad isnt starting?!?!
Any advice would be greatly appreciated! Thanks in advance