Vintage Dirt Bike Q & A

hi
can anyone tell me what parts of a mt250 will fit my 1973 cr250.i am rebilding a 1973 cr250 from wheels up it was left outside for at least 20 years in austin tx now lives in sydney australia
cheers
jimg
cr250m
cr80r 1980 original condition
it400f 1979 rebuilt

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Jim Garvey
1x honda cr250m 1973 in bits
1x honda cr250 champion dirttracker
1x yamaha tt500 dirttracker 1976
1x yetman triumph dirttracker
1x tt500 longtack speedway bike
1 x 1940 350 ariel speedway bike
1 x bultaco astro grasstrack bike antig

The MT250 cylinder and head will bolt on the 73 CR250. The MT intake is two bolt so you are limited to the stock intake and the 28mm Keihin that came on the MT250. The clutch cover and kick starter mech are the same. The rod is the same but not the crank halfs. The clutch will work if you use the crank gear from the MT250 with it. I think the shift shaft is the same. The CR250 down pipe may work if you use the exhaust manifold from the CR250 cylinder. Third gear in the tranny is the same but just the one gear. All others are different ratios.