Hello all, new to the forum. Ive been lurking and reading a ton lately and thought it was time to say hello! Im not a new rider, though it has been years since I've ridden dirtbikes. I did as a kid, and have been on street bikes several years.
I got the itch to buy a dirtbike again just to goof off/trail ride. I first borrowed a friends newer crf250x. It was a fun ride but seemed lacking on power after a few hours so I went looking for something I wouldn't get tired of as quickly....Long story short I bought a 03 WR450F that (supposedly) just had the top end rebuilt and looked to be in generally good shape except for a few little projects. I'm told +/- 8 hours on the bike since rebuild.
I didn't pay much for the bike so I expected to spend some money on getting it back to good shape...I'm posting today though because it looks like it may be a little more in depth than I expected.
What I was told for parts:
Wiseco High Compression Piston
White Bros Exhaust
Supposedly(there's that word again) rebuilt by a certified motorcycle tech.
I rode the bike when I bought it and very briefly when I got home, runs great, needs a little fine tuning on jetting but otherwise good. The next evening after work I was all set to change oil, coolant etc and just go over the bike with a fine tooth comb. I stupidly never pulled the dipstick when I went to look at it.
I ran the bike a few mins then drained the oil and about choked...Milky White Oil. So I changed the oil and ran it around our property maybe 10 mins. Drained again and it is less milky but definitely still there.
My first thought was it must be a head gasket but I also read about water pump seals causing the problem. Is there an easy way to settle on which it is? I cant seem to put my hands on a leakdown tester except possibly the harbor freight variety, it is cheap but is it worthwhile for diagnosing this?
It is hard for me to believe a headgasket is blown if the bike runs so well and had even a halfway competent rebuild done but...??? Thoughts, Suggestions etc?
New Tires(dirt), chain, and a few other things are in the mail.
Also, since we all like pictures: