900 cylinders and decompression hole

[900kingkitty]

is it o.k. to run two cylinders ,. one without s decompresion hole and one with? also, most cylinders i have seen the decop hole is just above the powervalve but have one with the hole over to the side, above the exhaust port. anyone seen this before?

 

[knuts82]

Yes you can run one with a decompression hole and one without, i did for a 1000 miles with no problems and the cylinder you have with the decompression hole off to the side into the exhaust port is from a zr not the mountain cat.

 

[Meatman]

overrated..i blocked mine off and picked up a m1 recoil....wow that ranks up there with one of the best mods for the beast

 

[RACINSTATION]

I have not found the decomp hole to have much affect. It was placed first in the ZR900 motor and then all 900s after that to aid starting. I can't tell a difference and they will compression test out the same. Run it!