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 The previous version was outdated and no longer supported.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

  • 2 Stroke Husqvarna Motorcycles Made In Austria - About 2014 & Newer
     TE = 2st Enduro & TC = 2st Cross

TE/TC Hearing detonation in front of motor

BSBen said:
Please keep us (me) updated. I have what sounds like a similar situation. I'm not convinced it's detonation, although it's possible.
Click to expand...
BSBen said:
Please keep us (me) updated. I have what sounds like a similar situation. I'm not convinced it's detonation, although it's possible.
Click to expand...
Well, mixing Dragon fuel (true 95oct) 25% or so mix in with pump gas and last 2 rides its quiet. Im 2 out on AS
 
First i
lankydoug said:
The hotter plug and more air would have made the problem worse and more prone to detonation or pre-ignition, you likely fixed the problem with more octane/better fuel.
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miss quoted MJ, its a 168 (as per JD at my alt), and yes i think you were right i mixed 95oct in and its now quiet last ride and 1 race. Ty
 
And i also misquoted needle color, im on Red. I keep looking at the te250 side of my instructions, sorry again guys for confusion on my first post.
 
Well, I got a pail of VP 110 and ran it for a couple of hours today - exhaust smells GREAT, but I digress... I ran it under conditions that would usually produce the knock and I heard nothing at all. So far, it seems like an octane thing. I really don't want to buy 5 gal jugs of VP at ~$70 a pop, so if this really addresses my problem, I'll probably try the 100 octane pump gas I can get around here. This weekend's hare scramble should let me know for sure if it was fuel, and I'll post my findings.
 
It was octane issue in my bike. I used 95 dragon fuel, changed to 110 race pump gas, plug is light brown instead of wet black, no spooge on pipe after race, knock went away.
 
I believe that better fuel has a lot more benefits than getting rid of a death knock. Longer shelf life without additives, not corrosive, starts easier, doesn't dry up rubber "O" rings and harden plastic parts, doesn't varnish up while sitting for short periods, can be tuned on the crisp edge without triggering detonation. To sum it up, we are buying and riding performance engines intended for racing so using race fuel seems to be common sense. I attribute good fuel to longer engine life and a cleaner combustion and exhaust. This means more riding and less working on your engine and fuel system. I'll gladly pay an extra $1.50 per gallon for that. (here in MO pump 93 is $2.49 and LL100AV is $3.99)
 
Pmsl $2,50 for a gallon!?! I pay £1.28 per litre for shell VP nitro. Lol you guys get far more for your money!
 
Wow - $2.49/gal is nice. The 100 up here (Chicago area) is about $7/gal. Better than $14/gal for the VP though, so I hope 100 does the trick too.

Incidentally, I found another station with 110 at the pump, but it says "leaded race fuel". I believe the VP 110 that bought was leaded (TEL). Can I just use the "leaded" pump gas? Any danger there?
 
lankydoug said:
I believe that better fuel has a lot more benefits than getting rid of a death knock. Longer shelf life without additives, not corrosive, starts easier, doesn't dry up rubber "O" rings and harden plastic parts, doesn't varnish up while sitting for short periods, can be tuned on the crisp edge without triggering detonation. To sum it up, we are buying and riding performance engines intended for racing so using race fuel seems to be common sense. I attribute good fuel to longer engine life and a cleaner combustion and exhaust. This means more riding and less working on your engine and fuel system. I'll gladly pay an extra $1.50 per gallon for that. (here in MO pump 93 is $2.49 and LL100AV is $3.99)
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Is this aviation gas? Thats cheap. I gotta look into this. I heard boat marinas will sell ethanol free 95oct
 
Do what you want.... Watch what you read on the internet... Make sure to research.... AV gas is meant for low rpm airplanes and different burn rates... I'll get with my vp and f&l guys to get the info...

If you are going to mix just mix race gas and pump....
 
HS507 said:
Is this aviation gas? Thats cheap. I gotta look into this. I heard boat marinas will sell ethanol free 95oct
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The AV100LL is aviation fuel and I buy it at our local airport. I've also used VP110 which runs better in my YZ450 that I re-mapped to take advantage of the better octane but the AV100LL and the VP110 run about the same in my WR250 Husky. I've heard a lot of different things said about why you shouldn't run AV100LL but it has never been backed up with anything other than opinion.
 
Remember gas you buy at the corner station is made to burn in new cars , not dirt bikes that are made to race and dam sure not a 2 stroke engine. Would'nt slower burning gas require a more advanced engine timing? Hotter gas I think would burn the best closer to tdc.
I too like the vp brand its expensive but I think its worth it also. (no doubting about fuel any more)
 
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