Honda CR 125M1 1975 cylinder wanted

[Richo52]

Hi guys I need a 1975 Cr125M1 cylinder to complete  my little Elsinore .Please message or ring me on 0437801714 thanks Richard.

[mrsupersport]

How about a 175 topend? Make a cheater

[Richo52]

Does it have a piston and cost thanks .

[bigk]

175 top end is not an easy fit (LOTS of work to do), with the end result a much slower CR175 than a stock CR125. Been there, done that but if you really want to, I have cases & top end here for MR175.
K

[Richo52]

Thanks for the info BigK ,why is the larger motor slower ?

[bigk]

Doesn't rev as quick, MR porting way different, pipes wrong, the list goes on. You can make a nice mid size enduro bike, but a standard CR125 is a better MX bike. Done RM & KX as well, same result.
K

[Momus]

Those cylinders are a bit hard to come up with here; US Ebay is a better bet.

 The Yanks are much more ready to part out bikes.

 There are usually a couple with bores left floating around there . I picked up one with damaged fins for $25 bucks the other night.

I went through the MR175 CR125 thing for MX  last year.

As Big K says it is not easy. I eventually thought to buy a complete MR engine and swap the CR ignition and gearbox into the quite different cases and port the cylinder and make a pipe.

 In the end I canned the idea as having already reached the point of diminishing returns.

[Richo52]

Thanks for the replies BigK and Momus,Im onto a cylinder at the moment will stick to a 125cc barrel.