• 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 The previous version was outdated and no longer supported.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 Wr 360 squish help

justintendo said:
my 88 250 is on the stock top end, i bought the bike as nos in 98. it has seen quite a bit of service, and still hits 212 psi on my gauge..im probably going to replace the piston just because of fatigue
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i have an 87 CR250 that is totally stock, replaced the ring out of concern but it was Ok as it was
 
any of the liquid cooled swedes are super strong if maintained. go easy and find top dead when you kick. feed it clean air and give it plenty of fuel and it may outlive you dog. i dont really race but my stuff sees plenty of pinned in 1st or 2nd hillclimbs...ive always let my 2 strokes warm up before getting on them hard and i think that helps them last. castor oil helps too, lol
 
I dont mean to start a "which oil" thread but my friends WR has survived on little more than Castrol Power 1 Racing fully synthetic. I mean little more, all he does is clean the air filter and flogs the guts out of it. We have to run it in these motors because everything else including Yamaha 2T racing oil fouls the plug in a tank or two
 
http://slavensracing.com/shop/slavens-mule-high-compression-component-cylinder-head-by-s3/ also found vhm but no wrs listed anyone used these?
Ive bored out the exhaust header as with the head off could clearly see the edge protruding into the outlet so blended that to correct size, more flow.
Looking at adjustable heads am taking it down to 55 thou on several guys reccomendations thats just off the head so i will be recessing the combustion chamber into the cylinder.
Will post pics basically im not stressed if this doesnt work as i can make the squish larger with thicker base gaskets this will also open up port duration a little bit...

So no one here has changed the squish in their bikes? How come?
 
juicypips said:
So no one here has changed the squish in their bikes? How come?
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I have. When I got the bike it was at .070 and I wanted it at .040 so I took the head to my local machinist/race shop. Got it back and it was at .050 Did the WallyBean reed box mod and the things runs like a KX500 on steroids. 2001 model
 
i didnt want to alter my squish as i was unfamiliar with the 360 when i built mine so i just set it to stock. i did do the reed stuffer mod tho. i matched the exhaust as well
 
someone here should put a thread together, find the posts that deal with the modifications of the 360, and compare to stock if possible, would be a pretty good read,,, well for me anyway
 
Matched exhaust and pm'd wally for his thread a few years ago all good got the bike well dialed in apart from squish i want the puppy to be on top form so all the down falls are my own lack of skill, like the thread idea of 360 mods
 
juicypips said:
Thats why i ask you... Reading the multi lingual manual is hard work.
Just being lazy and more opinions the better dont want to junk a perfectly good engine.

Oh i got the 1mm clearance as a guide from rd 350 settings i asumed most 350's would be around that area.
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On my 2002 wr360 the compression ratio (as manual names it) is 1,8mm, but if "justintendo" has the actual '94 manual and says 2,6mm then that is the correct squish band. As far as can understand though your bike has a ratio of 2,73mm. This seems to me like you have used some other piston that is approximately the same as for your bike , but not the right(just a thought).

A lot of piston manufacturers do this mistake and say that a piston or connecting rod is the same for 1992-2003 models but this is not always correct.
 
It's all good, I use the wossner piston for my bike the squish was set at 55 thou if I remember correctly.
She pulls like a train.
Has been through a piston since at 140 hours and a few sets of rings.

The manual specs ment that the squish wasn't actually doing much.
I've a huge bottom end lug and screams up an over 80 mph easy.
 
I recently bought member, Torben45's 2002 360WR that he completely rebuilt. He had the squish set to 1.8mm (.070") and CC'd the dome to remove a bit of material to keep the compression ratio reasonable. Bike starts easily for me although it takes a bigger boot than my '93 360, which needs a new top-end, due to low compression. I'm still debating what I will do with the '93. Thinking of shaving the head a bit, .070" seems reasonable to me at the moment though...
 
Ya, I've been thinking of picking up another 93 cylinder because even with everything that has been done to the 2002, I still prefer the power delivery of the '93 in a major way. The 93 has such a friendly, wide spread of generous power, while the 2002 is very concentrated. The 93 just seems smoother, while still being very fast.
 
brian bush said:
Ya, I've been thinking of picking up another 93 cylinder because even with everything that has been done to the 2002, I still prefer the power delivery of the '93 in a major way. The 93 has such a friendly, wide spread of generous power, while the 2002 is very concentrated. The 93 just seems smoother, while still being very fast.
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while I agree with your power band assessment, throw a Lectron on the 2002 and you might be shocked at the delivery difference
that said all things being equal, I like my 360 power as smooth and doesn't need as much compression to achieve the same power
that means it uses more 2 stroke dynamic power
 
Ya 2premo, the 2002 360 came with a Lectron when I purchased it. When I got the bike, it was a real handful for me in the woods. It was geared 14-52 and was running rich on the bottom end, then would abruptly clean up and made for quite a "hit" in the powerband. I changed to 15-52 gearing and put in a different metering rod in the Lectron and that made it into a different bike - much better for me! and the suspension and handling of my '02 are phenomenal with the 50mm works forks and Ohlin's shock. However, it still is not a friendly power delivery like my 1993 360. It is all low-mid punch and is somehow less appealing even though it is hard to explain. The '93 feels like a big bore, just a very friendly big bore, where the '02 is still more concentrated in delivery. Maybe it is that the higher compression of the '02 is partially to blame? I don't know, but I have read on here that a number of members feel the later model 360s aren't quite up to the standards set by the older models due to different porting specs from the factory on the Nikisil Cylinders vs. the Cast Iron liner in the older 360s. I tend to share that opinion at the moment.. By the way, do you still have a cylinder head off of the 360 you are parting out? I tried to send you a PM but I'm not sure it came through. I am looking for a 360 head with the head stay since the frame on my newer bike has the mounts for that. Plus, it will help me better understand how the compression changes things if I bolt on an uncut head.. Then I can decide whether to use heads with the squish mod or not.. Thanks as always for the input guys!
 
Yeah I've got a lectron an the 02 was all bottom and mid the leccy woke up the top slightly.

The 93 with lectron full fat psychobilly when in sixth tapped out she just pulls and pulls eats up fire roads so fast.
I'm only putting the 02 back on when the 93 is being re plated.

There's a load of pictures on here about power valve sizes the 93's are massive In comparison to the 02's.
The exhaust ports higher and wider also the transfer ports are bigger on the 93 it was a better tuned cylinder not sure who was responsible for working the 02 but torque isn't the be all and end all.

Workable power everywhere is tho.

93+lectron = keep bike for life!
 
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