What would TT Kaw 2T do about a lower rod bearing failure?

Me and my brother recently picked up an '01 kx250 that supposedly just needed a top end. Everything on the bike looks great except it has a nasty knock when kicking it over. We expected the worst but figured what the heck, we can fix it and we got a good deal.


Well it turned out in fact the big end bearing of the con rod seized up and went kaput. Lots of up-and-down play in the conrod and there is some nasty dicolouration in and around the crank pin on the crank flywheel weights like it got super hot..Also 1/2" of piston skirt is missing from the bottom of the exhaust side of the piston...up-and-down movement in the rod = piston smash off the bottom?


...I should have the motor split open this week, just waiting on a couple more tools. In the mean time I'm trying to decide which is the better route? Throw a whole new hot rods bottom end kit in? Or reuse the crank and send it out with a new rod kit and have it installed / calibrated...Wiseco is obviously out the question, I've heard nothing but bad things about their cranks...iIs hot rods a safe way to go? And are All Balls main bearings and seals going to last or is OEM the best way to go?

Get the OEM rebuilt.

With the heat damage, I would buy a used crankshaft off eBay and have it rebuilt with an OEM rod, washers, pin and bearing.


If the price scares you, then part it out and get what you can. Take a loss if need be and be on to the next one.


Off-topic, but... I am glad your hand is OK.

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 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.
    • By 02YZ426
      I thought it would be interesting to see what everyone in this forum is riding... So post them up
      Here's my 2006

      And my buddies 1996 KX250 that I just finished fixing up. Motor completely rebuilt and ready for the track.