Hot Seat Cool Head?

[Blackhawks1]

I just purchased A hot seat cool head for my '96 400 Xpress.Does anyone know where I can buy replacement combustion chamber domes?I've looked over the internet and haven't come across anybody who carries them.

[Russ C]

Try Rick Ritter

[Wheelie Man]

Check with PR2 racing i know thay can cut new ones..

PR2 Racing Technology

[Blackhawks1]

Thanks for the feedback.I'll look them up.I think the stock compression is 7.0-1.Seems a little on the low side.I don't know if you can compare the compression of a two stroke the same as a four stroke.Any idea about how high you can safely run with 87 octane gas?

[pjmartin]

Not sure how high you can go but the compression on a 400 is 9.2/1 full stroke and on a 500 it's 10/2 full stroke.