Vintage Dirt Bike Q & A

Hi all,

I have a Big bore CR125M 1974, 180cc bored and stroked bike, i am currently looking into building down pipes.

I believe it will suit those of you who have MR175 Motors in CR125Ms

I intend to build Two types of O.M.E look a like pipes with removeable mufflers, the torquer pipe will peak at 7000rpm and the Power pipe at 8500rpm.

Basically i am gauging the market. if i get a reasonable amount of interest, the jobs on.

Regards 1dv8elsinore

It's great to see people supporting these bikes. Thanks for your efforts. I hope you get a good response.
For my own situation, I just sent my MR 175 head and cylinder out for high performance mods and will wait until after I try them with my stock 76 CR125 pipe before comitting to one of your pipes.
Can you tell us more about this big bore engine and what piston, rod and crank you are using?

doesn't the cr125 and mr 175 have the same stroke?

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(2) 1968 DT1 1970 RT1M,1970 DT1C 1971 RT1B Enduro 1974 MT250 1974 DT250A (2) 1975 DT400B 1974 DT100,1978 DT175
1975 CR250M1 1979 CR250R 1979 Kawasaki KZ400H1 Jesus is Lord!!