Help quick please? Cam chain and timing marks! - Yamaha Raptor Forum
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Old 09-10-2008, 12:26 AM   #1 (permalink)
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Default Help quick please? Cam chain and timing marks!

Hopefully someone can answer quickly, I would like to get the motor back in the quad tonight.

I am in the middle of putting the cam and timing chain in time, to put the motor back together. I have read, and know how to do it, but the problem is that lining up the cam gear dots to head surface, and installing chain tensioner, it seams like to be in perfect time, is right between Were I can put it.

Timing mark is TDC, When its on one way, the front mark is just below, and back mark just above. If I move it a tooth on the cam gear to adjust the other way, it is oposite, the front mark is just above, and the back mark is just below.

What gives? Which way should it be installed? It was running fine before disassembly, except for 2nd gear being gone, timing didn't seem to be a problem.

Thanks in advance.
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Old 09-10-2008, 01:12 AM   #2 (permalink)
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Just to add, after rotating crank 4 full rotations, I have 3 clicks left on the tensioner.

If the chain needs to be replaced, would it hurt to run it for a weekend trip (this weekend) and then change it when the chain got here after I got back from the trip? If its ok, which way should i install the cam gear timing marks? with the front mark a hair up, as if i was running it and the wear of the chain and the tensioner pushing in on the back of the chain further, would cause it to run with the timing marks like that even if I wouldn't have been in the motor?

If I do that, changing the timing chain, can it be done with motor in bike, and besides valve cover removal and the side cover, stator etc on the one side of the motor, is there alot more I would have to take back apart to redo when getting the new chain?

Or is this ok to run, or is it asking for trouble.

Sorry for all the asking, I have a trail and track trip this friday and saturday (12-13) and was really wanting to take the raptor, if not, Ill just take the Blaster.

Im sure someone feels my pain!

Thanks guys. =(

PS Im in Nebraska, if I need a chain, and someone close has one, or you can get it to me by Thursday, let me know!! (LOL, I Highly doubt it)

Last edited by 01blasterdude; 09-10-2008 at 01:46 AM.
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Old 09-10-2008, 03:33 AM   #3 (permalink)
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I am trying to picture this and it sounds like this would be a Advance/Retard situation, if so depending on riding you would want to advance it. Advancing cam timing will gain more peak power, while Retarding it will grant more low end grunt.
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Old 09-10-2008, 07:56 AM   #4 (permalink)
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remove the chain tensioner for the proper alignment
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Old 09-10-2008, 08:25 AM   #5 (permalink)
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gsp, yeah, i removed it, like it should be to install.
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Old 09-10-2008, 08:29 AM   #6 (permalink)
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HFA, are you saying it shouldn't be a problem to run for my trip, or not a problem at all?
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Old 09-10-2008, 06:58 PM   #7 (permalink)
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You are risking a trip on an engine, you are the only one who can decide if the chain is on its last trip, and if it has only three clicks left, how did you determine this?
If the chain is out of the engine, see how much play it has, most chain companies allow 2% wear. And that is didly squat
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Old 09-10-2008, 08:35 PM   #8 (permalink)
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Thanks Willy. Your probably right, but you know when you get plans, how hard it is. BUT....I got my hands on a new timing chain today!!!! I did a butt ton of calling and found a place who for some reason had one on hand, and was about 80 miles away. I talked my buddy into going to get it. I paid his gas, and I stayed finishing up the trailer, and as soon as trailer boards are bolted down, back to the raptor with a fresh chain!

After all the fuss, I got a new one next day, never would have dreamed. I do appreciate the responses as I was freakin out when I didn't think I would be able to take it!

I will report back later! Back to work now!
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Old 09-12-2008, 02:20 AM   #9 (permalink)
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Got the chain, installed it, fixed problem like a charm! Bikes now running and shifting through all gears, and ready for the trip tomorrow!! Leaving in less than 12 hours!!! YEAH!!

Thanks guys for your responses.
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