cam to crank timing

I have an 1983 gpz 750 original owner, I bored out the engine .030 over. Valve job to head and new wiseco pistons and rings. I had low compression after the rebuild, about 90lbs in all 4 cyl. Moving the cam a tooth or 2 would change compression a little. Anyone know the trick to setting the cams to crank position. it was runnimg rough at one point. I tore it down again to inspect pistons and valves. everything looks great. it should have 150 psi in cyl. Thanks for any input.

have you got a manual?

No eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationskemp101 wrote:

I have an 1983 gpz 750 original owner, I bored out the engine .030 over. Valve job to head and new wiseco pistons and rings. I had low compression after the rebuild, about 90lbs in all 4 cyl. Moving the cam a tooth or 2 would change compression a little. Anyone know the trick to setting the cams to crank position. it was runnimg rough at one point. I tore it down again to inspect pistons and valves. everything looks great. it should have 150 psi in cyl. Thanks for any input.

Hello, Scott, and WELCOME to KZR!

If interested, these manuals are available.

Price is right, but time is short, on the first one.

The 2nd comes highly recommended and is probably one of the best manuals available.






Meanwhile, a leakdown test might prove helpful with regard to the lowish compression.

Good Fortune!

You can download the full shop manual here kz.mbsween.com/manual.html

See pages 54, 55 and 56 of the manual. The bottom of page 55 has a diagram of where the cam sprocket should line up when 1 and 4 are at TDC.

Thanks for the help I think it is dialed in now, I am almost redy to get it started!!: