Nitrotoys,
Firstly, you need to measure the squish clearance. In other words, measure the distance between the head and the piston at TDC.
If you aim for about 10 thou clearance you should be OK. Use the appropriate thickness shim if you are under 10 thou. If you are over 12 thou then machining is required to the head or top of the sleeve to reduce the gap. A shim is not essential - you don't have to have one in there if the clearance is correct.
If your motor is a K&B with a stock rod, DO NOT KNIFE EDGE IT! it will fail. Porting is only needed on the liner.
Tim.
Firstly, you need to measure the squish clearance. In other words, measure the distance between the head and the piston at TDC.
If you aim for about 10 thou clearance you should be OK. Use the appropriate thickness shim if you are under 10 thou. If you are over 12 thou then machining is required to the head or top of the sleeve to reduce the gap. A shim is not essential - you don't have to have one in there if the clearance is correct.
If your motor is a K&B with a stock rod, DO NOT KNIFE EDGE IT! it will fail. Porting is only needed on the liner.
Tim.