OK now you have that straightend out you want more power from the 425 power plant?First off you need to change the clutching,put a hi flow air filter,a pipe or muffler,find an HO cam and carb and maybe a 500 jug and piston.By the time you do this you could have got a 500HO sportsman. I had a 425 and it was a great motor but not a power house all I did was a K&N filter, Polaris white primary spring Aaen blue secondary and a Supertrapp exhaust.And it would hold its own against any of them.

 

Whats a FST 600 Kit?

 

Four Stroke Tech's 600 Big Bore kit for the 500 HO motor

 

ftwflh:
Did you do anything different with the jeting on your 400 when you put the pipe and filter on. I did pick up a White Brothers E-series slip on. I haven't put it on yet. I got it used and it need new packing in it. K&N will be next.

Jes
[img]i/expressions/face-icon-small-cool.gif[/img]

 

I had a Supertrapp onmine and it didnt need rejettting.Put it on ride it for a few minutes and check the plug.

 

Thanks bro.

Jes [img]i/expressions/face-icon-small-cool.gif[/img]

 

Well jesbilt, if you want more power than your 425 produces, why don't you put in a 500 HO engine? See 'em on eBay now & then cheap. Same cases, just bigger inside. Then your aftermarket add-ons will have something to work with.

-700 quadman

 

Well.... Honestly, My biggest problem is that I am an RPM junky. I love the high revving sound of a well tuned engine. Two stroke of four.
Don't get me wrong I love my 400 . It's been a blast to ride with my buddies and hunt with. I just want a little more power when it comes to the hills. It just doesn't seem to want to rev high enough. It reaches what it thinks is a comfy spot, and that is all she wants to give. It also seems to do this on the flats a tad. It just seems like it should rev a little higher.

Jes [img]i/expressions/face-icon-small-cool.gif[/img]