250-500cc Where to buy WR300 race head

I am looking for the factory high compression 'race' head for my 2009 WR300. Part number 8000H0944. Does anyone know who has this in stock or who can get it? Thanks. -Todd

Are you in the US? Have you tried Halls or Bill's? If the can't get it, probably no one else can. You can always have RB Designs redo your stock head. http://www.rb-designs.com/rb_designs_llc_005.htm

Thought about finding a race head as well. Is race gas needed with this set up?

Heath

No, I ran premium without any issues. I wish I didn't sell mine. I sold mine after destroying my shoulder and swore I'd never get back on the bike. Over 2 years later and I want to get back on it. I'll be sending my stock head to RB. I really liked the improvement the race head made.

Read it really improved the bike, but not a huge amount of detail on what was/is improved.

What does it do to the 300's power and delivery?


What about porting work? Anybody had porting done on their 300 too?


Heath

I tried Bill's, Halls, and AMOC with NO luck. When I Google search, there are some Russian (I think) dealers that seem to have it in stock. This place here seems to have it: https://www.neubert-racing.com/search/result?q=8000H0944# but I cannot get it to translate, and when I cut and paste their e-mail contact is says that it is an 'improper address' (it looks normal to me)?!

When I got my 300, I was expecting more. I fiddled with the stock carb and then bought a Lectron. The Lectron was a big improvement in my opinion, but it still didn't have a crisp snap to it. The race head made it feel more crisp and responsive. The race head should have been the stock head the 300's came with.

I just had Millennium Technologies replated and port my cylinder and shave the oem head. I was running the factory hi comp head before said work with a gnarly pipe, TC2 and PWK. The high comp head definitely added some low to mid grunt. 198 psi with the hi comp head (premium only) and 175 psi with the newly shaved oem head. I was hoping for more from the head work. 0.5 mm base gasket before and after. Did a 7 hr 90 mile enduro on Sunday which was the real first test with the new engine mods. I was flabbergasted at how much I could tractor up some pretty intimidating hills in 3rd. The porting is noticeable from mid to top even though Millennium supposedly did a port job to enhance the entire power band. Some think top end is dulled by the gnarly. Maybe. But matched with the porting my 300 pulls to the moon especially in 4th and 5th. Had to be careful in transfer sections on gravel roads when it opened up as things happened quickly. I'd like a little more low end so I'll likely put the factory hi comp head back on for a comparison.

I was also trying to get the Race Head last year but it was unavailable everywhere (discontinued part).

I finally decided to re-cut the OEM head, the chamber and squish area was redesigned and It was an improvement for sure, more low end and better throttle response.

It looks like this place still lists the head. If they still have them available.... is another question.

http://www.ktm-parts.com/AOMC/product/8000H0944


Heath

I called them a couple days ago and they said they can't get it.

Yeah, I had already tried AOMC as well with no luck.

Well crap! Same when I called.

You'd think someone somewhere has a couple boxes full of these heads.

Heath

When they were making parts, it seemed like they must have made them in small batches.

I have one on the shelf never did put it on. I guess I'm kind of glad I bought one when I did if you can't get them anymore.

The problem with the race parts is the first thing KTM did was cease production when they took over.

There is a bloke over here in Melbourne that can do a reprofiling machine job of the stock 300 head to correct the squish! He basically makes your existing head into the "race" head.

Dave at TSP smokey?

Yeah that's him, I'm planning to send my head there in a month or so if people want a ride review

Yeah I'd be interested. I had a race head but never put it on n sold it coupla years ago. Figured I'd get the stock head done if I wanted more grunt but stock is pretty good. Still next top end would be very easy to post over to dave to tweak it a little!