What's up guys?
I splurged after selling an XR400 and a Subaru Brat recently (I still have another XR bike and another '86 Brat haha)
I bought this 2005 Yamaha YZ450f supermoto custom bike from a dealer in Provo, UT for $3,500, I thought it was a deal!
Here's the kicker, I was told this was a former AMA Supercross race bike, Yamaha/Graves #19! The bike has clearly been built all around. Converted to supermoto at some point after. Bike is built on some factory Yamaha race frame? I was given an additional '05 frame and MSO of a regular YZ450f to go along with the bike purchase.

All I know for sure it may need is a new rear rim (the outer part of rim, scuffed from a chain-break or something on the left side and it appears to have a flat spot from hitting something). Its on billet aluminum hubs though, so with a new rim outer and re-spoked that wheel will be perfect.

Appears to have a bigger carb, probably high comp piston and some mild porting and a performance cam at least. M4 titanium exhaust/muffler. This bike is ludacris I've never ridden anything like it and I owned a 2000 R1. 4-gears surprised me when I found out, its geared so high as a track machine that you have to TAKE OFF from a stop or you will kill the engine it can't idle and roll slowly. Easily the loudest 4-stroke engine under 500cc I've heard. Carbon fiber engine guards, axle sliders, Raptor brake master cyl, custom aluminum unit under carb w/ lines I really don't know everything going on here.
So being that lound and already built race machine, with the frame it is on currently, I am more inclined to start racing it at miller motorsports park since I'm right here in Utah (instead of putting lights on it and trying to ride around on the street).

I am well versed in a variety of bikes, I am ready to become addicted to supermoto. I need a little more gear like a streetbike helmet and pants and boots, and I need a class or a mentor to start teaching me at MMP.

I like the brat just as much

Thanks, I've been working on and driving that '83 Brat pictured for a year and a half! Just sold it to a 16 year old as his first car, he likes it- the right buyer.
My '86 Brat I recently got is in much more original condition, and I'm putting it together right now with a 5-speed manual dual range transmission swap and many new parts, exciting! The '86 Brat didn't have the rear-facing seats in the bed anymore, but the Brat bed is long enough to fit one full-size dirt bike just fine.

Super cool! I've been building up my first sumo, so it's all new to me, but I like your catch can much better than mine. I bought the Supermoto Engineering catch can/hose thingy. Anyway, nice looking ride you have there! Sounds like it may have been Doug Henry's old bike.

THANKS! great to know

Yeah I need to learn about these yz450's and the oil in the frame/oil cooler situation and what's going on there.

Current 'race' frame its built on has no oil or whatever hoses coming out of the down-tube of the frame in front of the engine, no oil cooler.
The spare factory frame included, has what appears to be oil hose connections coming out of that down-tube frame section.
I need to find out what factory/aftermarket hardware I can purchase to maybe add an oil cooler, does a stock frame reservoir increase oil capacity?

If I chose to swap everything onto the other frame, and add this, I will be able to add lights and probably technically register this bike as 'street legal' - that would be awesome

But I'm getting ready to see if I will participate in anything at miller motorsports park supermoto on August 12th!... contact me anyone out here 801-638-92ninenine

I'd research a bit before going that route. It needs to go on the return side and not be too restrictive as to starve the motor. It's not quite as big a deal on an old tech XR, but just make sure you find some solid info before adding one. Maybe try ADVRider and look for some guys setting them up as adventure bikes.

The stock frame does increase capacity. The capacity from a 2005 to 2006 is about the same, but the 2006 carries it all in the motor and the cases are bigger, while yours was intended to be split with the frame. If your spare frame had the lines, you could plug the ends at the motor end of the lines, then fill the frame until the dipstick reads correct, then drain and measure the volume. Subtract that from 1.1L and then you know how much oil should be in the motor. Actually, you should drain the oil now and measure it, I'd be curious to know how much is in there. Once you get the oil capacity sorted out, know that your should probably change it twice as often as you normally would just because of the reduced volume.

I drained the oil in the engine, 34 oz total so just more than one quart. I guess with no dipstick or viewing window in the case that's all I have to go off of for now on quantity. (extra frame I have with the oil tubes has a dipstick in the frame)
I filled 34 oz of new oil, I bought a gallon of Yamalube 10w50, I will keep it changed more often under use so it stays clean.

I found where the old oil tubes used to connect on the engine I think. At least one of the holes has been filled up with an epoxy or silicone, I'm not sure how feasible it would be to try and return to a stock oil situation..

Edited by TajMan, 08 August 2012 - 06:47 AM.

Yep, I'd stop right there. Go with 34oz and just change it every ride or two.

The deal with the no oil in the frame conversion you have is still sold as a kit for 250s ( to hit rid of the oil tank) . Besides what you see with the frame the oil pump has been modified quite a bit to work in the "wet sump" set up . If you want to convert back you would need do do some work in there. The reason some did away with the std set up was to eliminate the oil lines and carry the oil weight lower on the bike. The downside is you lose the oil cooling effect of having the frame as a heat sink . The later 450s still have a dry sump system they just carry the oil in the front of the crank case rather then the frame. It's not the best setup for SM but the engines are so strong that the extra oil heat that might be created won't cause problems. Just make sure you don't run it out of oil.

Have fun

Woody's Wheel Works in Denver, CO did an awesome job straightening my bent Behr rim, and polished up/painted the scuff on the sprocket-side lip, for about $200-250 less than it would have cost me to buy a brand new hoop and to have had my wheel re-laced.
And I got a new Pilot Power 2ct tire- on the path now to becoming 'street legalish'

Edited by TajMan, 22 September 2012 - 10:50 AM.