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fridder

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About fridder

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    Pennsylvania
  1. I'm rebuilding my 400f (1999) after a major melt down. In the process of putting it back together the timming chain came off of the lower sprocket I thought it was no big deal but now I cant seem to get the prick marks on the cam sprockets to line up with the deck of the head when the timming mark is within the viewing window. If I move the chain on the cam sprockets one tooth Im too far on the timming mark and when I move the chain back I'm too early on the timming mark. Is their a difference between moving the chain on the cam sprockets and moving the chain on the lower sprocket like it would give me a smaller amount of ajustment to get the prick marks on the cam sprockets to line up with the head deck and the timming mark at least closer. Is it beter to have the timming mark lined up before the cams get to the proper location or have the mark be past. Also is it possible that with the meltdown I should be checking the woodriff key on the timming gear shaft, maybee thats why Im having such a hard time with the timming. Thanks for any help matt toledo ohio
  2. rebuilding 99 yz400f when putting the cam chain on can you have it 360 degrees off on the lower timming chain sprocket? does it supply spark every time the mark lines up or does it skip a revolution. I know how the cam sprockets line up to the to the mounting surface of the valve cover and the cam loabs point out. one revolution on the timming gear = one revolution on the piston so could I have it sparking when the piston is cumming up to exhaust? the book does a great job of describbing most everything but haven't found anything to make me understand this problem
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