• Husqvarna Motorcycles Made In Sweden - About 1988 and older

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 The previous version was outdated and no longer supported.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

My 83 XC500 get a Lectron carb (pix)

there is a thread on this on Ozvmx...CR 500 Honda pinging...lengthened the idle jet with a bit of thin fuel line and it helped immensely
 
If your seeing massive vibration could it be the swing arm tubes in the case are the newer ones with the larger diameter holes?
 
was just sayin its a common problem with the bigger bikes that gets overlooked.

radical head mods were touted for the CR's and YZ's of that era to stop them pinging and it was a simple fix all along. frothing fuel in the bowl.
 
Update:
I removed the inline glass re-usable fuel filter, and fitted a new 6mm pipe with nice gentle routing - just to be sure.
Quick test ride around the block - all seems good.
Then popped her onto the bike stand, hooked 6th and tried to simulate some load - all is still well.

I am very hopeful that we might have solved the fuel starvation issue.

Next step is onto the track...

Thanks again to everyone that is following or commenting on this thread. :)
 
Track results:
Close, but no cigar

I can get to 3rd, the carb will drain and the engine will die.
Coast a while, and the engine will come back, but no sustained high-speed for sure..

@Motoz:
Larger float bowl ?
Deep bowl drain plug ?

All suggestions welcome.
 
Check the flow rate of your fuel tap.

There could be a restriction in the tap itself.

What about the fuel cap and over flow hose are they venting?

I have in the past disassembled fuel taps and run a drill bit through the holes, you don't necessarily need to open the

holes up, just cleaning up any badly cast passages.

Cheers, Dave.
 
check the headstem pipe is clear if your tank vent hose goes in there. a relo had a yz 400 and it would go about 5kms then die. took 15 mins to restart. shop pulled it down twice (charged him a fortune) for no better result.
I rode it and noticed it starving on the main jet after a hard blast. stopped, opened the tank cap and heard a large intake of air. Some &*$%#@ had ball bearinged the tank vent hose.:D Some ones chooks were "let out of the pen" at a later date.
 
HI All

Carb vents are clear.
Tank gas cap and its' vent is clear
Foam filter in bowl is clear

Fuel line is 6mm
No inline fuel filter fitted....
 
I think You have something loose and floating around in the fuel tank and or the petcock. For some reason its passing the sitting still tests not the riding tests. I'd try another Tank and Petcock. It doesn't need to look pretty a plastic bottle and no petcock might answer what's going on.
 
my cr500 used to do this also , 6mm ID fuel hose and a big filter solved it . the little cone filters wont flow enough . you need one with the convoluted material in it that has more than 3 square mm of cone thing for a filter .

is it worth using some cheap crappy clear hose instead of fuel hose so you can see if the tap or the filter is your restriction

this is ok
200436_disposable_in-ine_petrol_fuel_filter_for_outboard.jpg


this is not
10023382.jpg
 
Post #95 above Bill !

It almost sounds like a vibration issue. Are the carb stubs too long, and touching something they should not ? Mainly on the engine side. That would airiate the fuel in the bowl, and as it got lower would be sucking air from the bubbles. Just a thought.
 
You must log in or register to reply here.
Back
Top