valve installed length

what is the correct installed valve stem length for a gpz 750 with 1.110 base circle cams for the middle of the shim range?

kawi810 wrote:

what is the correct installed valve stem length for a gpz 750 with 1.110 base circle cams for the middle of the shim range?

First, verify both cams are 1.110 base circles. I've had GPz 750's with smaller base circle exhaust cams.

If they're both 1.110 37mm should work.

Just make sure you verify both cams I got bit on a valve job because the FSM is wrong. I had to redo the exhaust and sink them more. I didn't have the cams for the head though so I didn't know the exhaust had smaller b/c.

I had already tipped all the valves for 37mm installed height..... Live and learn...

thanks larrycavan .my valves are around 38 mm and i need a valve job to freshen them up .how much can i tip the valve stems(max)?does any body machine the spring retainer for more clearance?or do you just by new valves?

kawi810 wrote:

thanks larrycavan .my valves are around 38 mm and i need a valve job to freshen them up .how much can i tip the valve stems(max)?does any body machine the spring retainer for more clearance?or do you just by new valves?

38mm for a 750 :ohmy: You're in for a treat.
Well, we've discussed that elsewhere now haven't we :laugh:

I'll say this one more time. YOU DON'T NEED A 38MM VALVE TO FEED AN 810CC MOTOR.

That said, here's some info for you

In situations like that, you may end up needing cams with smaller base circle. By the time you get the valves far enough apart on the seats, you might have them sunk so deep that even tipping the valves down to the keepers becomes not enough.

Re: spring retainers.... If you tip too much off the valves, you have to address bucket to retainer contact. That requires shortening up the shim collars on the retainers.

IMO, you're pissing in the wind but I don't have to stand next to you getting all wet :laugh:

Good Luck and may the Force Be With You!!

my valve installed length is about 38 mm . stock valves . sorry for not being clear.

what i am trying to find out is what is the max. length before i have to junk these valves and by new ones.i hope i made my self clear.and do i have to by stock kawasaki valves or are there aftermarket ones ?