550riverrat

Harry,

my name is willie and i talked to you on friday about doing the bore and hone on my 87 js550 and you told me to make sure i got the correct up size piston. my question would be how would i know what the next size up would be?

thank you

willie

MrSki

Measure the old one and add 1/2 mm. But then again, if you had deep scoring in the cylinder bore, you may need even bigger. What you should do is just send Harry the cylinder and let him determine and provide the right pistons for you. He needs them anyway to finally hone to the right clearance.

__________________
1995 PJS VHP7000, stock but darn fun.
1992 550 SX - R&R port Kawi Reed, Kind of fast.
1989 JS 550 - PJS motor Dual 46's, 50 MPH on GPS.
1986 JS 550 - Pile of parts at the moment.
1976 JS 400 - Pretty much just a shell.

550riverrat

harry if i measured my cylinder would you be able to tell me what size piston to get?

Thesepaperwings

Trust me, you really want him to have the pistons in hand when does the bore and hone. Every piston is different and this will make sure your clearances are good.

MrSki

I trust you!

__________________
1995 PJS VHP7000, stock but darn fun.
1992 550 SX - R&R port Kawi Reed, Kind of fast.
1989 JS 550 - PJS motor Dual 46's, 50 MPH on GPS.
1986 JS 550 - Pile of parts at the moment.
1976 JS 400 - Pretty much just a shell.