Today I managed to get a Polaris 350 2 stroke engine from a friend who had a old trailboss 350 he was parting out. I was looking at it and it seems almost identical to the 400 2 stroke in my scrambler just the head looks differant b/c the spark plug hole is offset and not in the center like on my scrambler. Could this 350 motor just be a smaller displacing 400? Im curious bec i was looking for a spare motor to build up just incase. Are there big bore kits for these 350's?

 

i also believe the 350 is a smaller bore 400. just like the 300 is a big bore 250....

 

That was my thoughts exactly that the 350 was just a smaller bore 400. Does anyone here know if this is correct or is the 400 model just a differant engine entirely?

 

its basically the same there are a few differances besides the cc the 350 is 348 i think and the 400 is only 378 the last 350 2 strokes were in the 93 models then they switced to a 400 for 94 but most of the internal motor parts (not cylinder or head )will interchange the cases are differant only where the counter balancer oil is added , in the front no dipstick on the 350 and they added a dipstick under the carb on the 400 cases,
i had a 350 bored .080 over and was almost the same cc as my stock 400 and ran great call rick ritter he'll make that 350 snawrl and snort

 

thanks. Hey itch. U think if i send Rick Ritter my Aaen 440 kit if it'll scream like a aaen motor will?

 

I been hearing of Rick Ritter pretty much on this forum anyone have a testimonial?

 

If you have been hearing about it, isn't that a testimonial? I am an RCR fan. Straight forward, knowledgeable, and genuine. Good work, decent prices, and customer support that will knock your socks off. Testimonial X 10. Doc

 


Good stuff Thank you

 

il let you guys know after today im attempting to replace the head and piston of my 350 trailboss 2 stroke 4x4 with the head and piston off of a 400 two stroke 4x4 so yeah wish me luck lol