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timing a gs 450

  • Thread starter Thread starter mickel
  • Start date Start date
M

mickel

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Ok so thisis my first post here and i hope you can help me. I had to do an overhaul on my 1982 gs 450l which consisted of new rings and all new gasket's. now my problem is that , i forgot to mark everything (bone head move) but anyway i belive it is 180 degrees out of itme and it crank's over and has spark and fuel. how can i get in time and check to see if it is 180 off or not? I dont have a book for it eaither, so any help would be great.

mickel
 
standard procedure is(for my 850):

turn engine to TDC on 1 and 4 cylinders.
line up 1 on exhaust cam with gasket face, pointing forward.
2 should be straight up, or close to it. attach chain to exhaust cam.
count 20 individual rivets in the chain, not links, but rivets.
when 20 rivet is reached, line the 20th up to 3 on the intake cam.
install tensioner and chain holder.
 
You are going to need a book for sure, but catbed has the basic procedure down.

The reason you are going to need the book is because different bikes have different rivet counts. For example, the shaft-drive 650s use 20, the chain-drive 650s use 19. No telling what your 450 should be. :-s

.
 
Exactly -- they're all slightly different, so you need exact info for your exact bike.

I have a GS500 manual, but the 450 could be different.

C'mon! Any 450 owners out there?

If it's assembled and you just need to check, at TDC on the compression stroke (usually, you align a "T" mark on the rotor with the #1 pickup. Turn the crank one more turn if the alignment is not as described below), there is a notch in the end of each camshaft on the right side.

They should be facing each other -- the exhaust cam notch should be pointing straight back (parallel with the cylinder head, not the ground) and the intake cam notch will be pointing straight forward.

It's pretty easy to see if you're a tooth off.
 
Last edited:
ok will give this a try to see if it makes a difference, thanks for the reply's
 
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