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 The previous version was outdated and no longer supported.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

125-200cc piston sizing

G

gazmcfaza

Husqvarna
AA Class
http://www.ebay.co.uk/itm/MITAKA-Pi...84?pt=UK_Motorcycle_Parts&hash=item35dd27fa38



my bike has the original cylinder on it and about 18000 miles, it's been through 4 pistons so far, atm it has a pro x which the garage put on, they also honed the cylinder. If I have now done 4500 miles or 160 hours on the piston, I want to replace it soon [though it still starts first kick and has bags of power but I heard cast pistons fail and mess up the crank. Assuming my cylinder is not scored or damaged when I remove it, what piston size do I get? Will it make a massive difference if I choose a b c or d size, and is it worth having it honed again? the ebay link is to the pistons whose seller told me to go for a c size piston but I read b c and d were only for oversizing, ie, for replated barrels, not just used barrels
 
The only way to know is to measure it with a bore gauge (not calipers), subtract the recommended piston clearance from the manual, and that is your piston size.
 
Do you know if your cylinder is original gilasil or has it got a cast iron liner in it? If its gilasil then dont hone it, and get an internal bore guage on it.
What are the exact sizes of piston available i see the listings for 53:95 if the next size up is 53:96 then no i wouldnt worry about sticking the slightly larger one in its only 0.01 larger.
Thats just me tho, pro x are a good brand i had Mitaka in my kmx for 3years who knows the miles parts for that bike were so cheap i honestly didnt care if i blew the engine up.

Are you just replacing out of worry for 160 hours?
 
Oh and when a piston fails its a lucky dip it may wedge a bit of skirt under your con rod, may trash your bore and ruin it could have the entire top above gudgeon come clean off and do no damage to anything.. Cant say for sure.
 
B, c, and d sizes are in fact for used barrels with nikasil plating. Like the others said, u need to measure with a bore gauge. They make A-D size pistons for that exact reason. Sleeves can't be measured down that fine. That's why they're usually matched with .5mm incroment pistons. A-D pistons are measured in .01mm incroments for the nikasil cylinders.
 
don't know what sort of cylinder it is but if mitaka lasted that long in a kmx I'll just leave it until it loses power then since you were probably riding the same style that I do, when I do take it off I will give it to the shop guy to have him measure it then he can do the maths to see what I need, thanks for the replies
 
You must log in or register to reply here.
Back
Top