Gsx cam timing problems

[Kraptanaman]

I am building up an 1170 motor.  A oproblem i have never encountered before.  I get to the 1-4 T mark and I cannot get it lined up.  It seems to rock one way or the other.   4 times i have done it and the cams are out.

[Blubber]

A few thoughts;

 

1) Have you measure the cam chain under tension?  it might stretched.

2) Have the cylinders or head been skimmed? 

3) Is the timing rotor correctly indexed?

4) Cams on the right place ( inlet on carbs side )? ( sorry have to ask )

5) Is the timing rotor a stock one or a 4° advanced version?

6) Has the ignition back plate been slotted to advance / retard ?

7) is the camchain tensioner working correctly?

 

Just a few pointers.

HTH

[Kraptanaman]

this is just before i line up to put the cam chain tensioner in the engine

 

[370steve]

36 minutes ago, Blubber said:

A few thoughts;

4) Cams on the right place ( inlet on carbs side )? ( sorry have to ask )

Just a few pointers.

HTH

Which daft twat would do that FFS 

[Kraptanaman]

3 hours ago, 370steve said:

Which daft twat would do that FFS 

Haha not me

 

[370steve]

I did 

[Gixer1460]

7 hours ago, Kraptanaman said:

I am building up an 1170 motor.  A oproblem i have never encountered before.  I get to the 1-4 T mark and I cannot get it lined up.  It seems to rock one way or the other.   4 times i have done it and the cams are out.

Yes its a pain in the arse but you have to build it up before you find it's wrong - not having the tensioner in place allows slack in the chain runs. If you find its a tooth out - mark it with Tipex chain and gear, carefully loosen the caps off and move the chain to correct the 1-4 mark, replace caps and check again - obvs checking the right number of pins between marks on the cams!