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Discussion Starter · #1 ·
Hello folks,

Well, as most of you know, the m5 engine, and the sabercat 500 engine, are made without power valves. I guess they are supposed to be entry level machines and dont need the extra power or something. Anyways, I am hoping for install power valves on my m5 engine.

I am assuming what I need is:
1. Head from an f5 engine
2. Servo motor
3. different ecu???

Just looking for some advice on how to go about this. Thanks for the info

-Boe
 

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5,966 Posts
Just get a big bore. M5 lower end is the same as F5 & sno-pro (wrist pins are bigger than the 440). So all the same big bore kits 711, 640, 730, 780 ect will bolt on.
 
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