Put a 525 jug - 12.5-1 and a hotcam in a 450MXR

[Polaris 450MXR]

So it was a dirrect bolt on quick mod and well worth it. I also went up a tooth on the front sprocket. The suspension seems so much mor plush the added power makes he jumps seem short and a lot easier to clear. Jug is like around 400 and piston was 200, cam 159. anyway this thing is sick I am stoked to put on an aftermarket exaust!

[xtreme 250x]

Sounds sick!!!!!!!!!! Did you get this jetted correctly yet?

[Polaris 450MXR]

not yet, havent had much time been here till like 12 lately worked on Sunday too.

[xtreme 250x]

That sucks I just brought My bike down to Mike This morning Hoping to win a Tranny on ebay But looks like the motors got to come back apart

[SSJEFF]

For that money you could have done the 540 kit couldn't you? I am raring for the 540 or the 570.

[Polaris 450MXR]

Well the KTM Hard parts were like 900 and my cost on the piston and cylinder are 500 so I can still buy a slip on and be very close to the price of the 540 kit. But yes it would have been nice to spend the money but it does rippp! I can't wait ofr some one to build a airbox for it!

[SSJEFF]

I thought the 540 and the 570 was around 600-700. I will have to look that stuff up again.

[eerhard09]

The 540 is $470 and the 570 is $670 from RoughHouseCycles. It is not the KTM hard parts but is a bored jug (540) and a bored and sleeved jug (570). Both are running Wiseco pistons I believe....

[600howhat]

are you running this on pump??

[xtreme 250x]

I went to the race with polaris 450 mxr and he runs 50/50 because of the high comp piston and cam work hope this helps