Cylinder Replating

[gjones]

OK, So I realize this does not apply to the 450 forum but I have a question I need some feedback on, and was hoping that Grey might chime in. (Since this seems to be where he hangs out.

So I broke down the 'ol '02 250 2 smoker last night to freshen up the top end and realized when I opened it up that it had been a bit too long. The bike still ran great so no seizure issues, but I noticed that above and below the intake and exhaust ports the Nikasil is gone. It appears to be the aluminum of the jug itself. My question is can I just have it replated or do I need to have it bored and sleeved. Is replating a quality solution or should I just shell out the bucks for a new cylinder and be done with it? If so, who does the best job? Any comments or suggestions would be greatly appreciated.

Thanks

[Bigcr]

A re-plate will work out just fine. I had my KX500 re-plated by millenium technologies last week and they did a fantastic job. $175 compared to $300 or more for a new one. DO NOT sleeve it. That would be taking a major technological step backward.

[Wiz636]

A re-plate will work out just fine. I had my KX500 re-plated by millenium technologies last week and they did a fantastic job. $175 compared to $300 or more for a new one. DO NOT sleeve it. That would be taking a major technological step backward.

I totally agree....Millenium does great work. ?http://www.mt-llc.com/

They did my RM250 and an old YZ250 that I rebuilt as a project. They might even have a cylinder in stock that they will send to you so you are up and running right away, once you receive it you send them your old cylinder back as a core. No waiting for the turnaround time!

They do cylinder work for several pro teams also.

[642MX]

I've used Millenium before too. They are top-notch! Nice work, quick turn around and affordable pricing.

[Pezman04wrx]

I've had great results from the people over at US Chrome for the work I had done on my cr250 cylinder ...

http://www.usnicom.com/

[grayracer513]

Whether to replate or not depends on the condition of the bore. If it is straight enough to be plated as is (which would be a little unusual) or can be bored to fit an available oversize piston, it can be done, and is a much better approach than sleeving, if it's done right. Steel sleeves are fine when they're built into the original cylinder by the factory, because they use manufacturing methods that improve the thermal bond between the sleeve and cylinder that can't be used on a re-sleeve.

[gjones]

I appreciate the responses guys, I was considering using Millenium to do the job, just wanted to see if anyone recommended them. Sounds like they do good work.

As far as the condition of the bore, all I have to go on is visual inspection at this point. There are no major mars or grooves or anything like that in the bore. It actually looks pretty good with the exception of the portions immediately above and below the intake and exhaust ports. If you run your finger nail along the interface with the worn portion and the plated portion you cannot feel any difference just the visual difference in material colors.

Sounds like I need to call Millenium and see what they can do.

Thanks again