Well,thank you,Dave.

You sure the slide is not sticking? Have you pulled the air intake off and manually lifted it? You know it's a vacuum thing.. you might consider hooking up a test,put a hose on the carb and suck on it,I have no idea what it actually Takes to lift the slide.. But,there are some pretty smart guys here who just might have an answer for you. There Are vacuum test tools and a resourceful guy Can figure out ways around spending money.

I've never seen a motor that ran with the timing chain off one tooth. Not saying it can't happen,I just don't Know. Did this problem Start when you were doing something with the cam chain?

Well,how does it run if you stop and just Take Off hard? A good running one should have enough acceleration to make you grin a little. What's an acceptable,Ohh say, zero to forty.. ooops uhh, 64.3kilometers per hour time guys? I was making it to 60 mph in real close to 6 seconds,but mine wasn't stock.
Do you know how to get a hold of the guy who sold it to you? Maybe he can tell you what started it all..Just stay nice.. I don't know what is wrong,but it RUNS and doesn't sound like it's eating its own guts so I'm gonna say it's gonna be okay. Might wind up peeling the top off and looking at the timing,but I think you can check it without that. There are timing marks inside the plug on the left side. If those are lined up,And you're on the compression stroke,not exhaust,then with the piston at TDC compression the valves should be closed and be at,whatever you said,,.1mm,wasn't it?
I know you adjusted the valves and they were closed when you did it,but did you check the timing marks on the crank shaft to get it there? Turning the crank the same way the tires roll? If you did all that then the crank and cam are as timed as well as can be. IMO even though the chain IS longer now,all that does is slightly retard the valve timing. As long as the cam lobes are not worn down it should run okay. You said you have modified the chain tensioner,,that is a good thing, but how close together are the chain sides now? Can you poke a finger in there?
GUYS how much can the tensioner push a tired old chain? I know it can't be allowed to push the chain over till it touches,that would be bad news..

You can "Prove"the timing. Pull the plug on the side and get it to TDC compression. If you have the valves set right BUT the adjusters on the intake side are set obviously different depths in the rockers than the exhaust side,the cam is off.
I don't know if that's even Possible,but at this point,what have you got to lose? That's what I would do..
You might wanna pull the plug and rotate the crank,not with a ratchet,but a breaker bar or something you can control the crank and not allow it to turn any more than you want. You can rotate it 180* and look at what the valves are doing,rotate,inspect,etc.
Be anal,analyze it. IF you go.

Oops got to go..

justin_o_guy2 wrote on 09/19/14 at 12:26:10:


Thanks for this, I will check this tomorrow  


Ed L, I´ve changed to a raptor
I´m also leaning towards fuel or carb
I really think that I have put it back just right, but I will check that as well.

Feel free to suggest more, need all the help I can get  

/Thomas

Have you checked the cam timing?
1 tooth off will cause this problem.
If new chain, cam marks will align with head,
used chains will be slightly up at the front
at max chain stretch cam will be close to 7° retarded.