05 250X- added Merge AP Spring...

I've added the Merge Racing AP spring, and now I see "another" CRF site selling a plunger, diaphragm, and housing from an 08 250x, for older model 250x's as a retrofit upgrade- do I need this too???

Maybe it's just a good idea while the carb is out, if so, is the the same as buying the parts from the dealer? Is he offering something exclusive.

Thanks guys,


Personally, I would say no, but I'm not that familer with the earlier models.

I would think the spring would be enough though. That addresses the main issue with the design. I would think you'd only need a different diaphragm and bowl if you made radical modifications and even then, a different leak jet would probably be more in order.

What's the problem your trying to solve and what have you done so far?


Edited by JimDettman

No problem per se, just updating a stock bike with the CCC mods and Pro Circuit pipe with an R cam. Thought I might do the rod and diaphragm if the consensus here felt it was needed. Thanks for the response Jim!

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