do i need a 426 crank to increase cc's
Posted July 23, 2006 - 03:50 PM
the cc increase isnt as important as the extra strength gained in the small end off the rod, but given the pistons are the same diameter, the cc increase must come from the stroke? yes?
i think this is a basic physics question, but hope that someone out there can help.
Posted July 23, 2006 - 06:40 PM
it must have been atypo on the site iwas looking at, at least i hope it is.
i've got some parts on the way and i thought i may have stuffed up.
should know soon
Posted July 24, 2006 - 12:44 AM
The cheapest place I have found for OEM Yamaha parts is here.
I'm pretty sure that Wiseco use to sell aftermarket 95mm(426) pistons for the 400, but people were having rod failures in high time motors. The largest piston Wiseco sells for the 98-99 400 is a 94mm. I was planning on doing the same upgrade that your doing to my 98 400, until I found a near new 02 426 dirt cheap. To bad the used dirtbike market in Australia seems to be much more expensive than here in the states.
Posted July 24, 2006 - 03:16 AM
am getting it direct from Japan at about half the cost of sourcing parts locally, eg head gasket locally 78-84 bucks,, direct $35
thanks for your help.