Who Rebuilds Dirt Bikes?

[Mastermind]

My grandson's buddy got a 02 KX250 that is locked up. The jug seems ok......needs a piston. The rod bearing is done.....and the mains are stuck. Do any of y'all rebuild these things? I'd love to send this thing to someone for a rebuild for him.

 

[ktmtigger]

Used to do a lot of the 250s a few bigger ones. Lost access to the press for the cranks so no go anymore. But if you say the rod ends done then it will probably be cheaper to stuff a new crank in it

Sent from my E6910 using Tapatalk

 

[Mkinslow]

My grandson's buddy got a 02 KX250 that is locked up. The jug seems ok......needs a piston. The rod bearing is done.....and the mains are stuck. Do any of y'all rebuild these things? I'd love to send this thing to someone for a rebuild for him.

Not that much different than a saw motor boss. Pull it out,set it on the bench and go to town boss. I've done several through the years.

Sent from my SM-G892A using Tapatalk

 

[Intoxsawcated]

Might as well port it too.

Sent from my SM-S767VL using Tapatalk

 

[Mastermind]

Used to do a lot of the 250s a few bigger ones. Lost access to the press for the cranks so no go anymore. But if you say the rod ends done then it will probably be cheaper to stuff a new crank in it

Sent from my E6910 using Tapatalk

That's what I figured.

Not that much different than a saw motor boss. Pull it out,set it on the bench and go to town boss. I've done several through the years.

Sent from my SM-G892A using Tapatalk

I wouldn't have any problem splitting it.....and going thru it. But I've got no time.

 

[jacob j.]

Bigmac builds/rebuilds a lot of MX motors, you might give him a shout.

 

[merc_man]

Bigmac builds/rebuilds a lot of MX motors, you might give him a shout.

Thats who came to mind as well. @Bigmac

Sent from my SM-G950W using Tapatalk

 

[Xr650jkallen]

Funny I just asked @Mastermind about this same situation the other day lol.

 

[Mkinslow]

That's what I figured.



I wouldn't have any problem splitting it.....and going thru it. But I've got no time.

Would be a good project for the bubba and his friend though.

Sent from my SM-G892A using Tapatalk

 

[Mastermind]

Would be a good project for the bubba and his friend though.

Sent from my SM-G892A using Tapatalk

And that's likely how it's gonna end up.

 

[Bigmac]

Ya I do them, but the cranks are not worth repairing. A new crank kit bearings and seals will add up. Depending if you go with OEM parts or not, even if you go aftermarket you’re probably looking at close to $600 for parts

 

[Mastermind]

Ya I do them, but the cranks are not worth repairing. A new crank kit bearings and seals will add up. Depending if you go with OEM parts or not, even if you go aftermarket you’re probably looking at close to $600 for parts

Spot on for what I'm seeing on prices. Anything we need to think about as far as special tools for splitting the case? I've got everything for saws......but not much for bike engines.

 

[Bigmac]

Spot on for what I'm seeing on prices. Anything we need to think about as far as special tools for splitting the case? I've got everything for saws......but not much for bike engines.

I highly recommend getting a case splitter and crank installer, they aren’t that expensive. You can get them through Rocky Mountain ATVMC, under the Tusk brand. That’s really the only specialty tools you need, it’s nice having the clutch basket holder too
They’re just like a big saw that has a transmission and power valve! LOL you can do it

 

[Mastermind]

I highly recommend getting a case splitter and crank installer, they aren’t that expensive. You can get them through Rocky Mountain ATVMC, under the Tusk brand. That’s really the only specialty tools you need, it’s nice having the clutch basket holder tooView attachment 246968View attachment 246969View attachment 246970
They’re just like a big saw that has a transmission and power valve! LOL you can do it

I appreciate this.

We split a Yamaha of Bubba's.....but parts are damn hard to find for it. It was no trouble.....

Looks like Bubba is gonna wind up trading Blake out of this bike, so that means I gotta do it.

 

[Bigmac]

I personally don’t like the hot rod and main bearings, the Kranks are fine but I like to use OEM main bearings and seals.On the piston I would only use OEM or Wiseco, I do not like the pro X pistons or namira.
Look over the cylinder really well, Kawasaki has extremely thin plating, it is very common to have the plating worn through at the top of the cylinder where the rings park at TDC

 

[Mastermind]

I personally don’t like the hot rod and main bearings, the Kranks are fine but I like to use OEM main bearings and seals.On the piston I would only use OEM or Wiseco, I do not like the pro X pistons or namira.
Look over the cylinder really well, Kawasaki has extremely thin plating, it is very common to have the plating worn through at the top of the cylinder where the rings park at TDC

Excellent information sir. Thank you. I'm hoping to talk him out of trading for this bike. He'd end up with 1500.00 - 2000.00 in it.

 

[dall]

Excellent information sir. Thank you. I'm hoping to talk him out of trading for this bike. He'd end up with 1500.00 - 2000.00 in it.

ouch

 

[beaglebriar]

Excellent information sir. Thank you. I'm hoping to talk him out of trading for this bike. He'd end up with 1500.00 - 2000.00 in it.

If the motors in that bad of shape then the rest of the bike will need much love also. Iff'n the boy has to have it ship it north, I'll build it for you.

 

[S Sidwell]

Plus if it has KIPS, you'll want to rebuild that too.

Sent from my SM-G550T using Tapatalk

 

[Mastermind]

If the motors in that bad of shape then the rest of the bike will need much love also. Iff'n the boy has to have it ship it north, I'll build it for you.

I'm trying to get it outta here. LOL

Plus if it has KIPS, you'll want to rebuild that too.

Sent from my SM-G550T using Tapatalk

It does.