951 squish clearance

[rusty]

Hi, I have a 98 gsx ltd (silver motor) that is bored 1mm over. & the cylinder head was not machined. what squish clearance should I be looking for to get best performance & reliabilty. Should i get the head squish bands cut to match the larger bore?

Thanks

[Technical Support]

Re: 951 squish clearance

Yes you need them cut out for the new diameter, you don't need to change the clearance.

[rusty]

Re: 951 squish clearance

what should the squish be?

[Technical Support]

Re: 951 squish clearance

Stock is usually around 0.065" - 0.075" but it makes no difference on a stock ski from 0.060" - 0.100".

[Bill O'Neal2]

Re: 951 squish clearance

.070 is a good safe number that will not hurt your performance.

[rusty]

Re: 951 squish clearance

Bill do you recommend getting the head cut to match the 1mm over bore?

[Bill O'Neal2]

Re: 951 squish clearance

Measure it. If the squish band outer diameter is less than 89mm, then yes. You had better clearance the rave valves too.