450r carb on 350x engine?

[bkivett]

I was told this is a good match. Has anyone done this and if so how? What connections, jet...
Also I think I am going to have to rebuild the top end. What bore and piston do you guys suggest? I have a 350X engine in a 250X frame with 250R arms, 350X swinger & axle. It sees more woods than track.
Any other suggestions or any words of wisdom on this bike would be great.
Thanks,
Brian

[Jason Hall]

What year TRX carb? What ever one you use will be ALOT bigger than the stock 350X carb boot, and also ALOT bigger than the stock 350X Intake port. You will need to open up the port, and make a bigger Intake to hold the carb. I would suggest a 400EX carb. That will also need the Intake port made bigger, along with removing some rubber from the Inside of the stock 350X boot with a dremmel. The stock boot will stretch over the 400ex carb.

[beastlywarrior]

honestly your best bet would be a z400 carb the mod has proven to do wonders for the warrior motor

[jcs003]

or a new carb from a yamaha 350 raptor. i hear it is a nice design.