Vintage Dirt Bike Q & A

I would like to check a 1974 CR250M engine out, for any wear, or anything needing rebuilt.

Does this forum have an online engine/shop manual for this bike?

Really need the:

1, Piston to bore clearances

2. Torque specs

3. Timing Specs

4. Crankshaft specifications/clearances

Thank you in Advance

Stryke

_________________
We don't quit playing, because we get old; We get old, because we quit playing!

_________________
80 CR250Ra
80 CR250Ra
78 CR250R
80 CR80
82 Bultaco Sherpa 340
78 Bultaco Pursang 250 MK12
76 Bultaco Frontera 370 MK10
76 Bultaco Alpina 250
73 Bultaco Lobito 125 MK6
76 Suzuki RM125A
90 Kawasaki KX250

b-joe,

Thank You, for that info.

Do you know of what pistons and rings, that are still available?

1.Factory OEM

2. Wiesco

3. Others

Thanks again
Stryke

_________________
We don't quit playing, because we get old; We get old, because we quit playing!

I have a wiseco in my cr250m cylinder and it works fine. They still make them so are not hard to get.