TIMING CHAIN HELP!!

[beachboy66]

Ok so i marked the chain marked the stock gear. I duplicated the mark on to my new light weight gear. My question is can the chain jump down at the bottom in the motor. I have read the book and they say it dosent matter where the front piston is its just good to find TDC for practice.

This is my concern , how do you know if you have TDC on intake or exhaust. This would mean that it would be 180 degrees off. But i have also heard that it fires TDC and BDC. Please put your 2 cents in. thanks!

[GTXX]

the reason to find TDC before disassembly is so if anything slips you already have it at the starting place to reassemble it correctly. Older 2 stroke Sea-doo's fire at TDC and BDC but the 4 stroke fires only once.

[GTXX]

hint: all of the valves are closed on the cylinder that is firing, if you had bothered to find TDC before you removed the chain you could have spun the engine but if you spin it now with the chain off or in the wrong position you will bend some valves.

[beachboy66]

Gtxx thanks for the info. I think i have got it figured out. I also couldnt find TDC iN #3 because a valve flotted in #2 this is why i makerd the chain.

[beachboy66]

JUST RAN IT ON THE TRAILER RUNS GREAT. nOW FOR THE RIVER TEST.