ive never rode a klx140 but i would get the trail bikes 143 kit. makes decent power and is cheaper than most kits. you could get the kit with or without the race head.
ya theres the motor now what about suspension everything s so high price i think if i just do sum work to a 140 it would stomp a 110 or if any of you have a full out mod 110 for 3200 or less plz reply
well you could stiffer fork springs, or something made by sano or red barron, and get a mono or a +3, +4 swingarm with a new shock and you would be good to go
mine is not for sale but i see sick ones all the time for that price im sure if you look around or wait a little you can find one...you can do what you want to the 140 but it will take alot to beat my 178+r