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Pele05
10-20-2004, 09:15 PM
I'm big boring my 400ex, which way does the arrow go on the wiseco piston?
BSTURDIVANT
10-20-2004, 09:38 PM
Toward exhaust.
Pele05
10-20-2004, 11:37 PM
thanks
cals400ex
10-21-2004, 04:13 PM
most go towards the exhaust PORTS.
cals400ex
10-21-2004, 04:15 PM
by the way, just compare it to your old piston. you will be able to look at your old piston and see how the valves matched up. the stock piston has an "IN" on it meaing this part of the piston points towards the intake valves.