Jump to content
Sign in to follow this  

Is it possible to bolt a CR500 jug onto an RM125 bottom end?

Recommended Posts

Is it possible to bolt a CR500 jug onto a RM125 bottom end? Or would I have to buy a CR500 bottom end too?

Share this post


Link to post
Share on other sites

Should bolt up, gives you alot more compression if you use the rm 144 piston aswell. Don't forget to adjust your muffler bearings and change ( or clean) your powerbands.

  • Like 2

Share this post


Link to post
Share on other sites

Using the CR500 cylinder is just a compromise. :lame:

 

Better to go with a stroker option for more torques. I carefully measured up the RM125 casings and found that by using 20,608 crankcase gaskets I was able to widen the casings enough to install a larger 15m long crank to increase engine output.

Admittedly I did need to source an extra few cylinders to make it run properly but the increase in combustion events per revolution really helped smooth out the power delivery. I was able to drop one tooth on the rear sprocket which was a surprising bonus as the bike now weighs 7 tonnes...

 

Here's the vid of them making my new crank. Engineering buffs should dig the machining process. :thumbsup:

 

https://www.youtube.com/watch?v=YCoHkl75-Dc

Share this post


Link to post
Share on other sites

All you need is a TIG welder, hammer and a file! Also take measurements with a micrometer, mark it with chalk or a crayon and make your cuts with a chain saw! :lol:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...