212 predator sputering

mudboat_josh

New member
My predator has been sputtering at mid to high rpm, my guess is the main jet needs to be bigger. What do you guys think?

Mods are:
governor removed
arc rod
mod 2 cam
arc flywheel
18lb springs
1.3 ratio rockers
mudboat pipe
hi-flow filter
 

mudboat_josh

New member
Low speed is stock i guess, i took out the main jet and drilled it out some so im not very sure what exactly the size would be.
 

MKilton77

New member
If you running gas drill the low speed with a #77 drill bit and the high speed with a #65. The best way to do it is to start small and take a plud reading after drilling.
 

Victor Sledge

New member
Correct. When drilling make sure that you only drill through the jet and not the entire plastic piece. You do not want a hole in the top of it.
 

JPR57

Member
Mod2 cam and 1:3 rockers will coil bind most 18lb springs. This could be your problem. I would look at getting some 26lb springs.
 
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