De-Restricting a Husqvarna Sm 125 2007

happybiker · Derestricted Danger Joined: 06 Jan 2013 Karma :

does any one know how to derestrict a 2007 Husqvarna Sm 125. im looking to purchase on and just wondering about how i can de restrict it and what needs to be done

af1 · Borekit Bruiser Joined: 09 Mar 2016 Karma :

I would think they are full power anyway , and being 2t they should have 30 plus
bhp. If they are restricted it's just getting the power valve working. Other options
are port the barrel and a better pipe....

https://www.motorcyclespecs.co.za/model/husqvana/husqvarna_sm125s%2005.htm

stevo as b4 · World Chat Champion Joined: 17 Jul 2003 Karma :

They did 15bhp and 26bhp versions. From what I've read the pipe is the restriction for the lower output, and it's just pipe send jetting that need to be changed, possibly the spark plug grade is a cooler grade on the full power bike.

It should all be in the factory specs regarding carb settings etc.

The SM/WRE is less powerful than the non auto lube race/enduro versions, but I've heard the cylinder and heads interchange for the competition bikes.

happybiker · Derestricted Danger Joined: 06 Jan 2013 Karma :

the one im looking at is the SM 125 2 stroke version so i assume its restricted to 15hp. So would i just need to get a derestricted pipe and rejetting required?