• Husqvarna Motorcycles Made In Sweden - About 1988 and older

  • 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 The previous version was outdated and no longer supported.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!

82/83 Husqvarna cr500 test/stats

I would suggest the reason for 'porting' any 2-T engine can range from cleaning up the ports, especially the transfers, that can actually smooth out the power delivery and often help that power delivery be less pipey. On a big bore that can make riding it less fatiguing and actually faster. From there, if you know what you are doing (of send it to someone who does) you can shift around the rpm range to what you want for where you ride most often, and/or build in a significant increase in output if needed/wanted!!!
 
the key sentence is someone who knows what they are doing ! keep you money in your pocket Bill and lie to your friends that its ported .:)
 
LastSwedish said:
I would suggest the reason for 'porting' any 2-T engine can range from cleaning up the ports, especially the transfers, that can actually smooth out the power delivery and often help that power delivery be less pipey. On a big bore that can make riding it less fatiguing and actually faster. From there, if you know what you are doing (of send it to someone who does) you can shift around the rpm range to what you want for where you ride most often, and/or build in a significant increase in output if needed/wanted!!!
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all very true...but the 500 is about as forgiving as i imagine it can get!
 
It all comes from American drag strip and big number hp fantasy. I could never find a need to increase horsepower on any open bike I have ever owned. If I did anything, it would be to soften the brutish power but then neither of the open Huskies I had never needed more than cleaning and matching the ports.

And yes, I have said this previously as well.
 
jimspac said:
It all comes from American drag strip and big number hp fantasy. I could never find a need to increase horsepower on any open bike I have ever owned. If I did anything, it would be to soften the brutish power but then neither of the open Huskies I had never needed more than cleaning and matching the ports.

And yes, I have said this previously as well.
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I agree 100% with the above. I will add that for 99% of people (including me) if you own an open class bike and you want it to go faster you need to buy a gym membership for yourself and forget the bike.

But Bill knows what to do, he will raise the exhaust port 3/8" and widen it 1/8" on his 500 because some chainsaw racer did it.
 
With the 500 At 53 rwhp that sounds about right. With the 390 at 43hp that puts the 420/430 inbetween like at 48hp.

Porting can smooth out the power delivery or you can have more hit depending on what you want. It’s the difference in being with a wild woman or a nun. Having the extra power it’s all in the twistie. If you don’t need it don’t twist it. I’m sorry I liked ripping out of the turns, Brapp, brapp, brapp, Just wicking it at will where you can. I like hearing the engine respond. Everyone who hears the bike has to ask about it. (390 at the dam) I liked showing off the old husky.
 
Kartwheel68 said:
I agree 100% with the above. I will add that for 99% of people (including me) if you own an open class bike and you want it to go faster you need to buy a gym membership for yourself and forget the bike.

But Bill knows what to do, he will raise the exhaust port 3/8" and widen it 1/8" on his 500 because some chainsaw racer did it.
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Oh come on now it was the factory rep from husky saws who did the cylinder I just measured it. It’s raise the exhaust port 1/8” and arc it to the sides then polish the exhaust port. Then they lowered the intake port. It’s like having more degrees of duration on a camshaft. It opens a exhaust valve sooner. This saw at the speed cutting at the local fair beat the other saws by seconds. My husky 2100(99cc) did eight cuts on a 9”x 9” timber in 17.5 seconds for first place. Now if I can put that bar and chain on my 500 husky lol.

I experimented on three or four 2t engines trying different porting. On the piston ported engines we cut 1/8” off the bottom of the piston to change the port timing. Then I raised the exhaust port. Then I lowered the intake.

There was a TT 500 racer in England who wasn’t winning. He talked with a racer in Australia who posted his porting and tuning specs. The racer from England started winning. A little porting goes a long way.

If your not using the full turn on the twistie don’t port it. Leave it stock.

Don’t forget I rode a 1200cc bandit on the street, the dirtbike didn’t scare me nor did the bandit.

Where’s the popcorn.
 
wrx said:
the key sentence is someone who knows what they are doing ! keep you money in your pocket Bill and lie to your friends that its ported .:)
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I been porting drag races engines since my late teens. It’s not my first rodeo. I do all my own work. It’s all about smoothing out the flow. We actually increase the flow rate. I’m 67yo now. I tried different ways to port 2t one at a time, my 81 250cr husky was the results of trying all different things to other engines in one engine. On the knife edge in the transfer port I don’t do a straight knife edge. I make a half moon shape. I feel it centralizes the gas flow in the port.

I took a 396 bb Chevy 325hp ported it added the 375hp valve train and had 299hp at the rear wheels on the full body car dyno. That’s 400+ hp at the engine. She ran 12.85 seconds in the quarter mile first time at the track.
 
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