• 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     WR = 2st Enduro & CR = 2st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

250-500cc Is WR300 racing head a good choice?

windsurf said:
To be honest I didn't and you really should. The combustion chamber visually looks smaller than std although again I didn't check the volume against std. I really did bolt it on and ride.
Click to expand...

don't feel bad, I did that exact same thing
 
IMO, the race head is the only way to go. Even if you're going to have it machined for a full race motor, it's a better starting point than the stocker.
 
454x said:
Doug the squish on my 250 was .095 thousandths with the thinnest base gasket.I'm gonna bring it down to .080. I'll let you know how it works.
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You know reducing the base gasket thickness will also effect your port timing so won't be the same as a race head. The squish sounds a lot at .095". what is the CR reading?
 
windsurf said:
You know reducing the base gasket thickness will also effect your port timing so won't be the same as a race head. The squish sounds a lot at .095". what is the CR reading?
Click to expand...
I bought the bike used so i just replace the base gasket that came on it.I'll probably end up going to the next size thicker base gasket as i noticed the ports are not fully opened at BDC. Don't know what the compression is at the moment.
 
i was told by a dealer that the bike pings with the high comp head even with high octane fuel - comments?
 
raysaw said:
i was told by a dealer that the bike pings with the high comp head even with high octane fuel - comments?
Click to expand...
High compression with poor fuel is one of the most common problems that cause pinging but not the only one. It can ping because it's lean, overheating, or too much spark advance, carbon deposits on the piston can get hot and cause preignition which is going to sound like pinging as well.
 
The race head isn't that radical as to cause ping on good pump gas here in the states. The stock head is a very low compression tub head that should be able to run on the worst gas.
 
454x said:
I'll probably end up going to the next size thicker base gasket as i noticed the ports are not fully opened at BDC.
Click to expand...

That is not an issue. 90% of the flow through the port takes place in the first half of the port opening. Ten or twenty thou. on the bottom isn't going to make any difference as long as the open time is long enough to fill and scavange the cylinder.
 
Well, I bought piston, powervalves and hi comp head to transform my 250 to WR300. More or less 30 days do arrive here in Brazil. I will make a DY transform 250-300 and post in cafehusky.
I am thinking, what I will tell to my wife :thinking: I guess, this a global problem ....
 
raysaw said:
i was told by a dealer that the bike pings with the high comp head even with high octane fuel - comments?
Click to expand...

I didn't have any pinging on my 300 with the racehead, and i used 95 octane fuel on the icetracks on a lot of wot. No problems at all.
 
Wow Johnny 64 ft. lbs of TQ that must be FUN!! I think I'm going to pick up a 300 TM MX for my tq. fix.
 
Hi
I installed the racing head '0944 ' with these settings:

Cylinder gasket 0,7 mm
jet needle (6 gay) on 3rd clip
pilot jet 45
main jet 440
2 , 3/4 turns out on the air screw
exaust similar fmf gnarly
silencer leovince X3

The bike has significantly increased power at all engine speeds while still providing a very straightforward,
power at low engine rpm like 4 stroke and high engine rpm never ceases to power like a 125 2t,
very very nice to drive, very good product.
 
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