OzVMX Forum

Marque Remarks => Yamaha => Topic started by: YZ250H on September 10, 2008, 05:15:22 pm

Title: Anyone know standard bore for YZ125J Please
Post by: YZ250H on September 10, 2008, 05:15:22 pm

Title pretty much say it all.  Anyone any ideas ???

TIA for any help

Title: Re: Anyone know standard bore for YZ125J Please
Post by: caps 999 on September 10, 2008, 05:26:23 pm

56mm according to serco apperently the same piston is run 76-82 yz125

Title: Re: Anyone know standard bore for YZ125J Please
Post by: YZ250H on September 10, 2008, 05:36:26 pm

Thanks Caps - just looking at buying a barrel bored to 57.25.  From what you are telling it could be on its last legs (??)
Thanks for the fast response mate - much appreciated.   

Title: Re: Anyone know standard bore for YZ125J Please
Post by: caps 999 on September 10, 2008, 07:50:33 pm

weel the biggest piston wiseco piston make is 1.50 so its near its life span

Title: Re: Anyone know standard bore for YZ125J Please
Post by: YZ250H on September 10, 2008, 08:01:05 pm

Thanks Caps.  I will wait for another one that has a bit more life left.  I've already got one on the last bore.  Need one on the first OS,.  Patience is a virtue when it comes to this sort of thing,

Title: Re: Anyone know standard bore for YZ125J Please
Post by: Viper666 on September 17, 2008, 03:18:18 pm

Wiseco make up to 2.0mm over (58mm) so it has 2 more bites at the cherry.
I actually have found other aftermarket makers that go in 0.25 jumps but rare.

Viper666

Still kicking but not sure if alive.