125-200cc Retro fitting 144 kit to earlier 125's

Hello all this is my first post on here as I have been lurking on here for a short while. I have come across an 05 WR125 here in Oz in really good nick with low mileage and was wondering if the later 08-09 upwards 144 kit will retro fit an 05 model bike ? Any advice would be greatly appreciated.

Sorry turns out bike is an 06 model not 05 as stated

yes i fitted a new 144 cylinder to my 2002 cr engine in my 2007 wr125, the power valves are different so you will need them with the new cylinder.

The cylinders are a direct swap as jo360 said. You can either get the oem 144 or big bore your present cylinder/head. This is not rocket science and if you have a competent borer/re-liner, and a good machiniest with some porting ability then you can get this done fairly cheaply. You can pm me for details if you think you can do it yourself.

Thanks guys thats just what I wanted to hear. I'm looking into purchasing a late model 144 kit and transplanting that. Then getting a 165 kit with the original cylinder.

post a wanted add in the classifieds of this forum, got one from here c/w powervalves and piston with 30 minutes on the piston for $500 USD.Thanks again Nate.