Have been riding kx125 without powervalve ....

I have been riding a 97 kx125 without the powervalve working ....i thought there was a reason it wouldn't wheelie :)

had no powerband "hit" when crack throttle.... no power wheelies even with a 13/52 gearing :applause:

just got it couple months ago and discovered the governor pin was gone and had no bearings in it to make it operate:bonk: very dity air filter also ...

reeds good,spark good, new air filter , hopefully better compression after hone and new top end?

PV's never opened during acceleration and the valves were very clogged with carbon when i cleaned the assembly

so i hope i will have some more power ? cylinder was very glazed over also ...... now freshly honed , new top end , and PV's working :thumbsup:

haven't ridin yet ...waiting for gaskets :lol:

how much more power ? anyone ever ridin a 125 without PV working ?

hoping this work will help compression and give it some balls

any input would be great:thumbsup:

how much more power ? anyone ever ridin a 125 without PV working ?

Lots. Lots and lots.

I've ridden a 200XC without the powervalve opening, might as well have been a corked up XR200.

Look at it this way: total valve failure in your engine, and it still ran! With minimal damage!

On my KDX I had one powervalve seized up so 2 were still opening. Rebuilt the topend and replaced the powervalves. Huge difference in power from that one valve not working. You will gain a lot of power going from none working to all of them working.

New top-end and fixed a non-functioning power valve? You'll think you're on a different bike.

Where did the pin and bearings go? Did you find them?

Where did the pin and bearings go? Did you find them?

tiny thrust washer bearings found in bottom of outer case and the GOV bearings ....a mystery:bonk: may have came out during a oil change cuz since i got it i have changed many times .... not sure only have had it couple months ....got lucky cuz dont see any damage from GOV bearings flying ?? looked at all gears ...from outer case holes...no damage. was amazed cuz when i pulled off outer case the GOV assembly fell out ...the outer pin must have broke and let the balls fly :lol: little damage on the outer edge of ramps ...maybe when the ball flew out ...

waiting for new GOV parts still :thumbsup:

can't wait to get rippin ...have been riding with no PV since i got it:foul:

lol...it's gonna be a week before the smile goes away. :thumbsup:

this gets me thinking that my powervalves or top end may need some work. I recently picked up a 1995 KX 125 and it has no balls at all (no wheelie, raps out very fast and just doesnt really get up and go). I thought it was because of my fat ass LOL (5'7" - 190 LB) but after reading this, I may need to do some repairs.

Are there any tests I can do to confirm a bad top end?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By luke8500
      Hi all,
      I have a 2004 Kawasaki kx250 that died suddenly on me the other day. all i can get it to do is backfire every once in awhile. Tested the resistance and everything of the magneto and stator with a multi-meter and all is good.  Coil is new oem Kawasaki the reeds are brand new vforce and the top end and carb have been completely rebuilt.  key on crank is intact and all the timing marks are lined up. I hooked a timing light to it and spun the motor over really fast and found that it is sparking way to late.  The service manual says that it is supposed to fire 14 degrees before TDC but it is sparking way after TDC.  Im thinking its a fried CDI box since its the only thing i wasnt able to check.  Any help would be appreciated
    • By luke8500
      Hi all,
      I have a 2004 kx 250 2 stroke and it wont start.  it only backfires.  I was out riding it one day and came up to a stop so the bike was just idling and it started to try and die so i revved it up a few times then let it die and now it wont start back up.  It only pops or backfires when you kick it.  Its getting good spark and i just put a brand new plug and coil in it. I took the reeds apart and they look like they're brand new.  It was running great before so i dont know what happened.  Im thinking it could be a fuel problem even tho the plug is a little wet if you take it out after a bunch of kicking.  Any help would be greatly appreciated 
    • By Zach121
      Alright, found three bikes all located where i live in Texas. I know they're all very different, but if you could tell me what you think each bike is worth, and which one would be the best deal. Thanks.
      Notes: Both 2 strokes have new top ends. I think the front brake lever is broken on the kawasaki.
      KX250 2002 $800-$1000?

      YZ125 2000 $1250

      KTM 400SX 2002 $1200

    • By Ryan Turner
      So I'm at a bit of a cross roads, I currently own a 06 rm250 and I love it. I also have a 02 kx250 which I'm selling with intent to buy a newer two stroke. I can't afford a newer ktm and the older ones aren't that great and kawasaki never impressed me. so I'm stuck between 06 yz250 and 05 cr250. I've heard the yz and rm after 06 are almost the same bike just the Suzuki handles better and the Yamaha has better suspension. So I'm not sure if I wanna buy carbon copy of my bike with slight differences. That's why I'm interested in a cr250 I heard the 02+ models RC valves are shit garbage but was mostly fixed in the 05-07 models. I ride at a track and at some bogs down the road from me. So from people who have owned both, what would you recommend. I know the cr is known for a hard hitting power band which I enjoy since im an aggressive rider. Should i just see which deal comes my way first.
    • By dirtbikesrule
      If you own a 2 stroke dirtbike,please reply once. Im just wondering how many people on this site have them.