So I just rescued my Polaris scrambler from under a tree where it never moved except when they hit it with a plow truck. Anyways I got it running and lost the bearings after about 20 hours.Now I just rebuilt the engine and I had a broken skirt rusted by bearing now my oil injection wasn't hooked up and I'm wondering if I should bother hooking it up I've just been mixing 40:1 seems safer to me also I put a natural piston in it will that skirt break

 

I meant to say balance crank bearing rusted also I put a namura piston in plus all bearings and gaskets

 

Lot of controversy on the oil pump being hooked up or not. MY opinion, hook it up. I have only seen 3 fail in the 30 years I've been doing this. 2 of them were customer faulted failures too. A lot of people like to unhook it and pre-mix. I dont worry about either, both ways work fine. The oil pump(if your wondering) did NOT cause the skirt to break. The 350 and 400 2 strokes didn't have an issue of if the piston will break, they had an issue of WHEN they will break. It is basically unavoidable unless you change the piston. Newver used namura pistons so no info from me there. WE always used wiseco and to date havent had a skirt breakage problem.

 

Never heard of Namura...I have, however, used Wiseco in several high HP Scrambler/Sport builds and I've never had a skirt failure (knock on wood!)...

 

Always use a Wiseco piston. They're forged, not cast like Namura and whatever it was Polaris used that would always end up breaking.

 

hey i just got it running today but it kept going into a high idle and I mean shut it down it would rev right out so I noticed my throttle cable was run down in a funky manner so I'm gonna reroute it tomorrow