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6858-400ex
02-09-2007, 08:49 AM
i am planning on getting a 460 +4mm stroker for my 400ex
is it true that i need a piston that has the wrist clips 2mm higher and if so were can i find a 440 big bore kit that has that and about 12.1 compression. hot rods sells a piston made for the stroker crank but the comp is a little lower than i wanted
10.5:1 is lower than i want, i am wanting to get pretty much the most power i can get

could i get away with 12.1 on pump gas

400exrider707
02-09-2007, 09:16 AM
Originally posted by 6858-400ex
i am planning on getting a 460 +4mm stroker for my 400ex
is it true that i need a piston that has the wrist clips 2mm higher and if so were can i find a 440 big bore kit that has that and about 12.1 compression. hot rods sells a piston made for the stroker crank but the comp is a little lower than i wanted
10.5:1 is lower than i want, i am wanting to get pretty much the most power i can get

could i get away with 12.1 on pump gas

Pump gas @ 12:1 on an EX is not going to happen, especially not with the extra heat of a 460 stroker motor.

usually when you purchase a stroker kit, pistons are included.