OzVMX Forum

Marque Remarks => Yamaha => Topic started by: oldmxracer on November 03, 2010, 09:58:50 am

Title: 175 top end on YZ125G?
Post by: oldmxracer on November 03, 2010, 09:58:50 am

Hello my Australian friends. Been snooping/researching an IT175 cylinder/1980 YZ125 combo. What year IT cylinder best for a 125G lower end? Use the 125 carb and pipe? Would use the bike for MX age class racing....

Title: Re: 175 top end on YZ125G?
Post by: cyclegod on November 03, 2010, 10:20:10 am

IT175 G or H (80-81) top end is what you need, use the IT carb but choose whichever pipe suits your riding style. The "G" 125 pipe is quite peaky on the 175.

Title: Re: 175 top end on YZ125G?
Post by: Nathan S on November 03, 2010, 10:40:57 am

Why CG said.
The earlier IT-D/E/F top ends won't fit (different motor), and the later IT175J/K top end will fit but have a centre exhaust port which doesn't work with the YZ frame.

FWIW, there's a very nice IT175G/YZ125G hybrid that has been turning up to Heaven events, and its quick.

Title: Re: 175 top end on YZ125G?
Post by: holeshot buddy on November 03, 2010, 10:56:52 am

i have  a yz175 barrel
i know they fit a c model

Title: Re: 175 top end on YZ125G?
Post by: jimg1au on November 03, 2010, 10:59:53 am

must be a mx175 as 1976 yz175 they made the barrel bigger it wont fit c or x.crankcases are different also.found all this stuff out chasing parts for my x
jim

Title: Re: 175 top end on YZ125G?
Post by: TM BILL on November 03, 2010, 11:52:17 am

Quote from: holeshot buddy on November 03, 2010, 10:56:52 am

i have  a yz175 barrel
i know they fit a c model

Is it for sale ? if so what oversize is it on and how much  ;D

Title: Re: 175 top end on YZ125G?
Post by: oldmxracer on November 03, 2010, 08:13:07 pm

Thanks all.