Jump to content

Engine Differences


Recommended Posts



According to my Haynes book:

stroke 50mm for both

bore 56mm for 125 and 66mm for 175

primary ratio 74/19 for both

transmission ratios the same

final drive 37/17 for 125 and 51/13 for 175

Only lists side clearances for rod, not diameters so I can't see if the sizes are the same.

Link to comment
Share on other sites


Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...