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Post by scootnewb on May 18, 2018 11:01:20 GMT -5
Some people say it is a tooth by where AT-A9 is printed. Others say it is by the smaller hole on the opposite side.
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Post by scooterted on May 18, 2018 12:38:34 GMT -5
Its with the center hole out. And the two other holes lined up with the head. There is a pic of it how it should be installed in this thread www.49ccscoot.com/bbk.html |
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Post by scootnewb on May 18, 2018 12:40:34 GMT -5
Thanks. I have that bookmarked. It looks like the stock cam though.
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Post by scooterted on May 18, 2018 12:42:42 GMT -5
My gilixal a9 has extra holes but its still got the 3 alignment holes. The center hole should bendirectly opposite the two cam lobes.
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Post by scootnewb on May 18, 2018 12:51:13 GMT -5
OK so the little hole  Like this |
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Post by scooterted on May 18, 2018 16:12:49 GMT -5
Yeah. Note the position of the cam lobes and the holes in the sprocket. First pic is my stock cam, seconds after removal. Second is my glixal A9 cam.   |
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Post by scootnewb on May 21, 2018 21:07:34 GMT -5
Thanks. I'm going to put it in this week.
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Post by GrumpyUnk on May 22, 2018 11:29:12 GMT -5
If you think about it, the cam can be installed right side up or upside down and it should work just as well if the piston/rod are at TDC. In one case, it would be the 'compression' TDC, and in the other, the 'exhaust' TDC. As the Chermans say, Machs Nix. Makes nothing. Doesn't matter.
Remember, the cam turns one time for two turns of the crankshaft. Watch the cam & the holes, and turn the crankshaft through two revolutions. You should see the cam holes line up in up and down positions, both at TDC of the piston. Ain't it a wonder?
tom
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Post by scooterted on May 22, 2018 12:18:25 GMT -5
This is true for this engine because it has a wasted spark ignition. Fireing each time the piston is near tdc rather than every other time.
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Post by scootnewb on May 22, 2018 15:49:07 GMT -5
Oh yeah. Cool!
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