KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: AZdirtRiDeR on December 16, 2006, 08:04:07 AM

Title: KX125 Impressive
Post by: AZdirtRiDeR on December 16, 2006, 08:04:07 AM: 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 :)
Title: Re: KX125 Impressive
Post by: kx666 on December 16, 2006, 09:42:57 AM: what year is she? little 125s are fun to putt around on! :wink:

there are a lot 150 kits availavle, making them a great trail bike
Title: Re: KX125 Impressive
Post by: AZdirtRiDeR on December 16, 2006, 02:37:23 PM: It's a '93.
Title: Re: KX125 Impressive
Post by: FPMXer on December 17, 2006, 05:33:36 AM: 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.
Title: Re: KX125 Impressive
Post by: kx666 on December 17, 2006, 05:58:30 AM: 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 :wink: )

~steve
Title: Re: KX125 Impressive
Post by: kx666 on December 17, 2006, 09:13:33 AM: 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.
Title: Re: KX125 Impressive
Post by: FPMXer on December 17, 2006, 12:58:34 PM: Just looked at LaSleeve's site and they only offer big bores for yamaha, honda and ktm.
Title: Re: KX125 Impressive
Post by: kx666 on December 18, 2006, 12:28:46 PM: hmmmmm.....

i wonder if wisco makes large enough pistons.
Title: Re: KX125 Impressive
Post by: kx666 on December 18, 2006, 01:29:46 PM: 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.
Title: Re: KX125 Impressive
Post by: FPMXer on January 15, 2007, 11:58:37 AM: 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.
Title: Re: KX125 Impressive
Post by: kx_rider53 on January 15, 2007, 12:09:27 PM: 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?
Title: Re: KX125 Impressive
Post by: FPMXer on January 16, 2007, 03:46:29 PM: Bore and replate.
Title: Re: KX125 Impressive
Post by: BrokenSpoke on January 16, 2007, 04:41:05 PM: 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
Title: Re: KX125 Impressive
Post by: FPMXer on February 09, 2007, 03:24:54 PM: 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. :-D