I currently have a 1999 WR400. I am buying a used 1999 YZ400 for a parts bike. The radiators are a different part # for the YZ and someone told me that they are not as thick as the WR. Is it going to make a huge difference if I run the YZ radiators. New radiators would cost as much as I am paying for the entire YZ.

If your interested in selling any parts off of the bike, email me. I would like to get some stuff for my WR.




86TT225, 98CR80, 99WR, WR timing, throttle stop trimmed, air box lid removed, White Bros head pipe, silencer and air filter. Odometer and headlight removed. Moose hand and mud guards. YZ stock tank and IMS seat. Renthal Jimmy Button "highs" and Renthal Soft half waffle grips. AMA, SETRA.

If your selling the seat and tank email me.

The YZ radiators have 1 less tube - WR = 11; YZ = 10. It probably won't make a huge difference unless you ride really tight technical trails & get lots of dirt caked on the radiators - ie no air flow.

I'd be interested in the front number plate.


I'm not planning on selling the bike or parting it out. I just wanted to know if anyone out there has tried using YZ radiators on their WR. I'm concerned about overheating.

Thank you Brian. That was the infromation that I was looking for.

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