The least expensive but better than an old one is a stock cast gear and chain set. The camshaft must move the exact distance at the same instant. ![]() With the timing cover off the engine rotate the crank a slight amount back and forth. The best judge is to check it while you are taking it apart. ![]() The 'S' and some 1275 have a much better "duplex" chain. The standard system on many 848, 948, 9cc engines is a single chain drive between the crank and cam. ![]() It makes no difference what the cam does if it does not do it in sync with the crank and pistons. Genuine AE Hepolite standard cast duplex gear and chain set, road use only.įound to be the best fitting in Mini Mag feature Autumn 2007 done by K.Calver.ĭriving the cam and controlling the timing relationships between the cam and the crank is what camshaft drive systems are all about.
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