• 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 The previous version was outdated and no longer supported.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 Top end specs?

sned2502st

sned2502st

Husqvarna
AA Class
I have tore my bike apart for the first time. 2nd season in the bag. Bike was running great but the power valve was sticking sometimes. I am going to put a new piston and rings in wether it needs it or not, but want to check the specs on things just to know how it wore. When you take the rings off of piston and place them in the cylinder to check ring gap what is the tolerance? What is the piston diameter spec? The cylinder diameter tolerance?

Cylinder looks great, piston looks great, head, rod play all seem perfect. I only tore it completely down to really clean the power valve good, replace some gaskets, and add one to the reed valve cage. For piece of mind I will put in a new piston and rings.
 
if you have the owners manual they list that info
did you happen the measure the bottom gasket as that's handy for setting the height in reassembly
good maintenance is important in racing but also just riding,,, they are hard to push on flat ground :mad:
 
Specs from 2011 service manual:

Ring end gap (maximum): 0.6mm (0.025 inch)
Ring axial play in piston groove: 0.12mm (0.005 inch)

Note that the manual specifically states to measure end gap at the bottom of the cylinder, where it has the smallest diameter.

Spec for cylinder ovalization is approximately 0.001 inches.
 
2premo, lost ya on the height setting. What height do you measure? I dont have a service manual, just the flash drive and book that came with it. Which dont show much.

Kyle Tarry, yeah I am glad you mentioned the part about the bottom, same as other bikes I have done just forgot about that.

Thanks for replying guys.
 
sned2502st said:
2premo, lost ya on the height setting. What height do you measure? I dont have a service manual, just the flash drive and book that came with it. Which dont show much.

Kyle Tarry, yeah I am glad you mentioned the part about the bottom, same as other bikes I have done just forgot about that.

Thanks for replying guys.
Click to expand...

the height setting is for the head squish, in another way of putting is piston clearance to the head
 
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