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 The previous version was outdated and no longer supported.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

All 2st Piston Sizing

Aviduser

Aviduser

Husqvarna
AA Class
Ok, so I had my cylinder replated a year or so ago. I gave the company the new piston to make sure the clearances were proper.

The time has come for a new piston, I purchased a wiseco 54mm stock bore piston.

I noted when I installed the old piston it was marked "E" behind the arrow. At the time I thought this was short for exhaust side. Looking at my service manual it appears there are pistons ranging in size from A-F. Starting at 53.940 to 53.970.

Confused as to why there are different sizes when you can't hone/bore a nikasil cylinder anyway?

Should I be concerned? Thanks.
 
Probably the size differences were made to fit discrepancies in tolerances in the final diameter of the cylinder bore. The range seems to span one and a half thousandths. If you are concerned and want to make sure that you have the most optimal tolerance, go with another stock E piston.
 
Thanks, I was wrong its actually a B sized piston.

N e way I just did the ring for now, everything's still in spec.
 
With the huskies 125 small bores, I would personally only used genuine pistons, but if you send a piston 'b' to get a cylinder fro replating etc then engineers should set this up correct, the problem maybe the exhaust bridge, it must be 'let back in' after replate, and also on genuine husky pistons they have two holes drilled for extra lubrication over the exhaust port, this will be the area to correct, assuming engineering by replating company is good!

Gixx
 
Was replated about 40 hrs ago. I have been using stock pistons so far, I went with the wiseco because I was ordering many other parts from 1 company. I see it has 3 holes for lubrication at the exhaust port. Vs the huskys 2.
 
Aviduser said:
Was replated about 40 hrs ago. I have been using stock pistons so far, I went with the wiseco because I was ordering many other parts from 1 company. I see it has 3 holes for lubrication at the exhaust port. Vs the huskys 2.
Click to expand...
Well that easy then, stick with what works ;-) stick with wiseco and stick with a 'b' next step maybe a 'c' when wear gets outside tolerences, my philosiphy is :- if it starts 1st/2nd kick hot/cold its good,
 
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