• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st 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 The previous version was outdated and no longer supported.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!

first top end rebuild. a few questions (te310)

bensl

bensl

Husqvarna
AA Class
i have a done a head gasket on my 2012 te310. it has about 90hrs so i have decided to replace the piston an rings while i have it apart. i have never attempted anything like this before so have a few questions
- an oem piston runs over $100 more than an aftermarket wossner or pro-x brand. any issues with these aftermarket brands?
- each offers 3 sizes within 0.01mm of each other. is there any way of knowing what size to order without buying a cylinder measuring tool?
- do i need to hone the cylinder? if so can i just use one of those drill wire brush things?
- should i replace the timing chain at the same time? if so, is it a relatively straight forward job?

any tips/help would be appreciated. cheers
 
Can't comment on oem vs. after market piston quality but you want to check size of current piston and buy that size. There will be markings printed on it. The other sizes are if you intend to bore the cylinder. I do not suggest honing that cylinder. I bet the factory hatches are still clean and fresh. Likely it will just need a soapy/water and scotchbrite wash. You can measure the timing chain to see wear with a ruler. I bet it is fine with only 90 hours. The service manual will have the wear measurements for the TT.
 
The other sizes do not require boring. Each up size is only .0004 inch larger in order to compensate for slightly worn nikasil.
I have used Pro-X in my 310 with no problems.
 
Happy you chimed in joedirt. i am surprised that they make such small increments in pistons. Thought new rings would take care of any small wear.
 
I cant say for sure but my guess the variations offered as Joe identified are likely due to manufacturing variations, batch to batch variations, and tooling wear over time. I may be wrong, but the slight variation in size does help with a very very minor amount of cylinder wear. Again, were not talking about boring one over and replating, but rather, less than half a thousandths.
 
thanks for the replies. much appreciated.

a few more followup questions...
- i cannot see markings on the piston at all except for the numbers 11 N28 075 on top. does that refer to the size?
- i have tried to measure the cylinder and piston but can seem to get an accurate reading. i assume the factory size will be the smallest of the 3 sizes offered so i can just order that?
- the cylinder does not have any of the factory hatches remaining (i can see them below the piston stroke). will scotchbrite still be sufficient or could use a fine steel wool or something courser?
- is replacing the timing chain a straight forward job too? i may as well do it now if it is.

again, thanks for then help. its a bit daunting pulling apart an engine for the first time.
 
The numbers or top of the piston will give you the size but you must look it up in a book or online. When I have done topends in the past I took my piston/cylinder into a local motorcycle shop. My last one they looked at it then they took it in the back and ball honed it real quick and told me to keep the piston and just get new rings which they had in stock.

I am the one stranded if my bike brakes down so I usualy don't go cheap on parts.

Not sure about the timing chain. how much is it for a new chain?
 
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