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| 1977 cr 125 motor size compatability https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=213 |
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| Author: | ttwin [ Wed Apr 21, 2004 5:54 am ] |
| Post subject: | 1977 cr 125 motor size compatability |
I recently bought a 1977 cr 125. The crank is locked and i am unable to split it. Tried finding a used replacement. What i would like too know is how much modification would be required too replace the 125 cr motor with a 1977 250 cr motor. If anybody knows or has tried this please let me know. Any help at all would be appreciated. |
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| Author: | redrocket190 [ Wed Apr 21, 2004 5:43 pm ] |
| Post subject: | |
Have you considered having the crank rebuilt? Racers Toy Store in Escondido, CA will do this for you, as will Arizona Crank Works... |
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| Author: | ttwin [ Fri Apr 23, 2004 4:11 am ] |
| Post subject: | hmm little misunderstanding |
the 125 cr motor on it is shot i know where i can get a 250 motor for dirt cheap that runs it's a 250 cr or mt. what i need too know is how much work will it be too fit the 250 motor on a 125 frame. |
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| Author: | J [ Fri Apr 23, 2004 10:07 pm ] |
| Post subject: | |
Why not look for XR motor and make a 4-stroke hybrid. It may be easier and safer. |
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