Derbi case transfer ports w/varying wall thickness btwn models

Hi everyone,

Thought I'd pick the collective brain on here.

I had a quick break between work meetings I went downstairs to my basement to take a look and removed the cylinder and head off of a stock Start 5 I have. Ordered the usual parts from Treats, but just by first impressions it seems that the castings on the Start 5 are much closer to the transfers with a thin wall thickness. It's almost like they changed their cases a bit to make it more difficult for kids who bought them new to make them faster haha.

I don't know this for sure, but from just pinching to feel the wall thickness from the inside of the transfer port to the exterior under the ignition seems different from my other two motors by quite a bit, doesn't seem like quite as much meat there to play with. I will take some measurements and pictures later of the cases from my flatreed, Start 3 and Start 5 just to have on here for future reference in case anyone else is interested.

Any insight?


Re: Derbi case transfer ports w/varying wall thickness btwn models

Cool to know

I didn't port that far back on my FR so it never occurred to me that there wasn't a lot of meat

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account