• 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 The previous version was outdated and no longer supported.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 125 head squish?

R

R_Little

Husqvarna
Pro Class
What is the recomended measurement?

I'm rebulding Norm's old 125 bottom end and am going to try the solder trick. I have an assortment of base gaskets E Gorr sent me.

Thanks!
 
About 1mm I believe. My 06 was 1.2 stock. The stock base gasket is .5mm and the optional race one is .3mm so it would have made it perfect. If yours is as close as mine it should be easy to get it right. If not RB Designs does good work for a good price.
 
1mm = 0.39". That's a nice, tight squish for a trail bike!
Still leaves a little wiggle room for crank bearings to wear too.

Messing with the base gasket will change port timing slightly. Not sure if .2mm's is enough of a change to notice or not, but the technique to correct squish w/out changing port timing is to deck the head and then rechamber the dome back to stock cc's.

Playing with base gaskets is cool too though. And cheap!
 
Yes, you can order the .3's from your dealer, it is just a option in the parts fiche. Every 125 I have had has a .5 but make sure when you take it off by using a micrometer. If you look in your owners manual it should have a page showing a range that is safe, like 1.0-1.5mm. When you change your port timing down it gains more bottom, if you raise port timing it gains top end. That is with a case reed motor like the 125/250.

Be very careful with your solder, it is easy to snip off a piece and not know it. It happened to me once but luckily I was able to get it out of there. Next time I think I will take a black sharpie and color the ends of the solder to make when I take the solder out they are not broken off. Check out the article on gasgasrider.org on measuring squish in the technical how to. Sorry to mention gas gas but it is a good article.

P.S. sorry to hear about Norm's old bottom end...
 
PC.;115841 said:
1mm = 0.39". That's a nice, tight squish for a trail bike!
Still leaves a little wiggle room for crank bearings to wear too.

Messing with the base gasket will change port timing slightly. Not sure if .2mm's is enough of a change to notice or not, but the technique to correct squish w/out changing port timing is to deck the head and then rechamber the dome back to stock cc's.

Playing with base gaskets is cool too though. And cheap!
Click to expand...

How much would you expect the bearings to wear typically?

My old WR250 motor always had a little "up and down" on the crank bearings even when it had relatively new bearings..it ran fine with no noise but the everpresent little bit of play always concerned me.

BTW, the CR125 manual says squish is .047"
 
They should last forever, but contaminates can get in via the air filter or dirty fuel and grind away the balls. If the mains, lower and upper conrod bearings all start to wear and show play then .040" is not much wiggle room. At least that's what my head tells me!
 
PC.;115967 said:
They should last forever, but contaminates can get in via the air filter or dirty fuel and grind away the balls. If the mains, lower and upper conrod bearings all start to wear and show play then .040" is not much wiggle room. At least that's what my head tells me!
Click to expand...

Makes sense but do you think .001 up and down on the crank should be cause for alarm?

The rod is always tight but the crank always has a little wiggle.
 
I'd be concerned. There should be zero up and down movement in the crank and rod.

Maybe the crank journal or inner bearing race is getting worn and not making a press-tight fit :excuseme: Crank bearings usually give you some warning before they really go south. Usually a growling, whirring type sound that is more pronounced at lower RPM's and goes away as the revs climb.

I'm no mechanic, so take all this with a grain of salt. This is just stuff I've learned over the years playing with cars, boats and bikes. I've blown one of everything up! And have learned lots from it :cheers:
 
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