Chainsaw Repair

I came up with this mod back in 1998 for modded work saws or race saws. It involves installing a different piston in the 372(Use Jons 670 piston) in 372 BB (use 272 Husky piston),then the squish area on the top of the piston is simply machined leaving a comp. dome, and the stock cyl.gasket and squish gap are correct after. This mod is made to work with a raised(modified) ex. port, or compression will be very high with stock ex. port.
The biggest benefit of this mod is that the fuel charge in the crankcase and under the piston will now have a FAR better path into the transfer ports with the windowed piston! This you must see with your own eyes- put a stock piston on the rod and rotate crank to BDC with no cyl.on,at this point the upper transfer ports in the cyl.are wide open,BUT the stock Husky full-skirt piston with no side windows almost completely blocks off all of the fuel charge under it and in the crankcase from escaping past the piston to the transfer ports! I consider this a colossal blunder in design,but with the windowed piston in place you can see that the fuel charge in the crankcase has a direct fast shot straight into the 372's big modern transfers.
This mod really adds some serious power to these saws,I have done very many since '98.
Included is the machining specs,sorry for my crude diagram.

Send it to me I will resize it to fit hopefully. Will PM you email

OK I sent it to you,please post it,crude as it is... thanks.

Didnt need resized. I changed the pix from 90 to 72 and made it bigger. I hope so can read easier.