KX125 Impressive

[AZdirtRiDeR]

Okay, never owned a 2-stroke before.  I'm VERY impressed with this little bad-boy.

Started out with some jetting problems, but a simple shim and we're flying.  Scared myself popping the clutch

Wasn't expecting much - that'll teach me.

Kinda glad I couldn't sell it now

[kx666]

what year is she? little 125s are fun to putt around on! 

there are a lot 150 kits availavle, making them a great trail bike

[AZdirtRiDeR]

It's a '93.

[FPMXer]

150 kits? I haven't heard of or seen a 150 kit. kx666 put the link to this kit. Sorry for highjacking the thread but I will be taking my top end to phathead racing next month for a big bore job.

[kx666]

i am not sure if the 150 kits are online...i will look. i have seen them in some of the books when i was working a the shop.  and one of our guys installed one on a CR125. i will look and see whit i find (it is a slow day at work so i will most likly have time  )

~steve

[kx666]

i am un able to look at thier web site at work (i dont have a flashplayer) but i think it was LA sleeve that has a 125 big bore kit.  the 125 to 150 convertion has been around for at least 3 yrs. i am sorry i dont have more info. i hope this helps.

[FPMXer]

Just looked at LaSleeve's site and they only offer big bores for yamaha, honda and ktm.

[kx666]

hmmmmm.....

i wonder if wisco makes large enough pistons.

[kx666]

http://www.fueltechusa.com/kx_125cc_1994_to_2006.htm

theese guys offer the full service. i hav never used them... i have a local machine shop let me use the equipment on my bikes. i hope this helps. let me know what you find.

[FPMXer]

I just took my top end to phathead racing last week and it's getting a 134cc treatment and will be done in 2 weeks. Total cost of kit, parts and labor is $385 OTD. Can't beat that one. But I already have the head and domes otherwise it's $500 for the same. Any bigger and you run into powervalve issues.

[kx_rider53]

I agree, i would not go bigger than 134. If you get case mods with it, the throttle response becomes very good. FPMXer, did you go with a sleeve or a replate?

[FPMXer]

Bore and replate.

[BrokenSpoke]

This doesn't really apply to your situation but if you have an 03 - 06 KX125, and a lot of cash ($2,000) these guys have a 151cc big bore kit.

http://www.maxpower-engines.com/big-bore-kits/kx151.htm

[FPMXer]

I got the KX134 running this past week and took her to the track today. What a difference 10cc's make. It pulls longer and harder through the gears. But after riding the 450 with Enzo suspension and then riding the 134 with stock suspension is a big difference. I have to get the 134's suspension to Enzo as soon as I get the cash. I turned the clickers almost all the way in to get a better ride. But if you have a 125 and are looking more power and about $500 laying around contact Paul at phatheadracing and git-er-done.