250-500cc wr 300 head mods

Huh?!

Precisely!

Finally got a chance to bolt the head on yesterday. Huge difference in the volume. Just rode it around the neighborhood so I can't really report on any changes. Engine sounds a little different and certainly seems snapper down low. Of course this could have been from the cool day and lower humidity. couldn't tell any difference on the kickstarter effort.

One big caution - if you order the head also order two new fittings for the water lines where they come into the top of the head. Mine had some kind of pipe dope on them and it nearly stripped all the threads off the fitting when I took them out. I got them back in the new head but it's temporary fix until I can get new ones.

Headed to Brushy Mountain this coming weekend, will post up when I get back

look forward to your observations

Can I ask who sells the RACE HEAD for the 09 WR300?

and what spec Khlien carb are people upgrading to?

Who does the head work? What do they do and how much?

The race head is in the Husky powerparts catalog.
The carb is the Keihin PWK 38MM Air Straker.


Begin with the Keihin carb, 175 main jet, EEL needle in 2nd notch (from top) pilot 42 and air screw 1 1/2.
Just that will help you a lot

Back from Brushy Mtn.

Rode everything from some hi-speed fire road to a XXX nasty single track.

First impressions, bike seemed to start easier, although that could e attributed to the cool dry air, low end seemed a lot stronger with the big hit smoothed out, it did seem like it lost a little bit of the over rev it had before and liked being short shifted.

all in all for a $100 and an hour to bolt it up I think it was a very worthwhile investment.

Carb is Keihin 38mm PWK AS 165M CEL middle slot 35 pilot running VP C-12 and Motul 800 @ 50:1 (please no more ratio lectures, Motul says 50:1 and they know what they put in their oil) Stock pipe

PS - it didn't make it any harder to kick, I can't tell any difference.

Thanks again Rob.

Did you do both mods at the same time or seperately to see which one made the most difference?

I would try the settings on the carb that HRC 630 suggests! That´s quite similar to what i use, and i think it,s a great combo!

Johnny:sweden:

I don't recall what fuel/oil mix HRC is using, that my be the difference.

I do have an EEL I want to try.

Sand,
I did both separately, I did the carb after the second time I rode it. That has made the most difference.

Hi guys
Can anyone help me with purchasing an EEL, or CEL, needle, or link me to somewhere that would ship international? If any of you could do it locally and mail it to me, I'll paypal up in front and for your trouble as well.
I just cant find it anywhere around here.

I think I have an extra CEL, I'll look tonight

what do you guys think, would a gas gas domed piston be a better upgrade or the husky special parts race head?

or both...

I agree. Something must have gone wrong.

I normally go 150-200 hrs on a top end. I do this on my kx250, 200xcw, 250sx, my fiancee's (national class racer) 250xcws, and my wr300 is up to 93 hrs now, mostly aggressive riding or racing (i use my 200 for most technical mountain riding).

Thanks
Also, if anyone knows which KTM needle would be the equivalent to the above that would be great, as KTM stuff are easy for me to get. Couldn't find any conversion table or just the KTM needles specs.

Just bought a DEL off of ebay for $8 and... $27 shipping...

Damn... I can get any Keihin needle for $4 from my motor guy. And I only charge $25 shipping

At least we still have some perks here in the states. Cheap needles!

Does anyone have the part number for this head. I will buy and try if I could order one.

I need to pop the head off of my bike for a peek anyway.


Thanks!
Tony