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2002 Yamaha Raptor 80 cam chain

jsa750k

By jsa750k
in Yamaha ATV Forum

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jsa750k Rookie

jsa750k

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Wouldnt start,pulled off the covers to check timing/set valves. cam sprocket bolt backed all the way out,keyway"tab"n sprocket broken off and cam chain laying in bottom,broken. Gotta split the cases to replace the chain,right ? It freinds bike,he wont be happy but,I guess he should'nt have let the kids mess with it !! Whatta ya think ?

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pete59edsel Grand Master

pete59edsel

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1. Take the timing chain tensioner out.

2. Pull the cam cover off.

3. Remove the bolt from the cam and the cam gear

4. Remove the bolt that holds the side case and flywheel to the crank.

5. Pull the stator side case. Watch the little alignment tubes. Remember how the bolts came out, some are longer than others.

6. Pull the flywheel. Flywheel puller.

7. Take the chain off the timing gear on the crank,put on the new one. The easiest way to get it up to the top end is to drop a piece of wire down through the head and tie it on. Once you get the chain pulled up, tie to the frame to keep the chain from dropping back through.

8. Put the flywheel back on.

9. Put the side case back on,the magnet from the flywheel will grab the coil on the side case and the flywheel will jump out as you almost have the side case on,If everything is aligned properly to start with this won't be a problem and everything should slide back together.

10. Put the crank bolt back in and torque it. {Shop Manual for settings} 43ft\lbs??

11. Turn the flywheel over to get the timing mark in the window and reinstall the cam gear.

12. Check your timing marks.

13. Reinstall the cam bolt Torque it. {Shop Manual for settings} 43ft\lbs??

14. Reinstall the cam chain tensioner.

15. Check timing again, always wanna be certain!!

16. Put the cam cover back on.

17. Cross fingers

18. Start machine.....

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jsa750k Rookie

jsa750k

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Yeah, I got it. I was thinking of my old 750 4 banger where the chain dropped into the center of the case and turned 2 overhead cams. This is simple,except none of the stores here in town are open,plus I'll prolly have to order parts and wait,wait... Thanks Man !

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