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 The previous version was outdated and no longer supported.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

1987 430CR 4-stroking

Invest in a decompressor , it will save you another kick starter shaft.

Silly question but does it have the correct slide in it.
They come in left and rights and if you have bought a new one it could be wrong.
The wrong slide makes them do some funny things like run rich.
I have seen this done and when you [ I ] try to tune it out it goes beserk.

A broken/leaky reed makes the bike run richer and richer as it fills the air cleaner with fuel.

Sounds like ignition , tried a different husky coil?
 
The reeds are fine. The carrier had a bit of corrosion , but it cleaned up fine.

I don't have another coil. Anyone know if a meaningful bench test can be run?
 
Grunbay said:
I have a 1987 430CR. The carb is clean, the timing is proper, there is no intake leakage at the carb, the silencers is newly re-packed.

The bike is 4-stroking under load. Any ideas on what could be causing this?

This is my first reed valve engine, so I can only lay blame on the part that I'm not familiar with - the reed?
Click to expand...


so stupid question
did you get it like this or did it start doing this after you rode it a number of times??
 
Grunbay said:
I just got this bike and it's done it since I bought it.
Click to expand...

OK, the reason I asked is you really don't have a baseline on it
check your slide for cut-away it should be 2.5 and it is critical to 1/8 throttle
the pilot/ air screw is up to 1/8 throttle jet needle and throttle cut-away take you to a little over 1/2 throttle
on the round slides there is also a needle jet which is replaceable but most likely the throttle cut-away or jet needle
 
Could be the ignition breaking down under load. Can you borrow a system from someone else - to illiminate this possibility?

I take it you have checked the main jet is somewhere near correct?

try a fresh B8ES plug.

Andy.​
 
Right. I have no baseline. It's never run right!
Main 430, Pilot 40, Slide 2.5, Needle in center position, Needle 6 DH 20, needle jet R-0 - all the same as stock per the Technical data sheet for 1987 CR430
All carb parts are either new or in apparently perfect shape.
I don't have another ignition system to try. I am starting to suspect the ignition system. I have a fresh plug and just replaced the plug wire end.

Still not right!!!

I'm so tired of kicking this beast over. I rebuilt my starting rollers! It should be a bit less exhausting to start now.
 
nothing worse than an untraceable fault. matches come readily to mind as a final solution:eek::banghead:;)

got to be sortable. a mate had an intermittent spark on his xc 250 years ago, drove him nuts until he cleaned the powder coat off the coil mount and got a descent earth.
 
My 1987 WR250 fourstroked when the carb inlet manifold split. I couldn’t see any obvious holes but a few layers of insulation tape around it proved the point. The bike would rev ok but would crackel and miss fire at lower revs under load.



I know you say the inlet manifold is good but I thought I’d mention it just incase.
 
so some thoughts as the last post said the intake may look Ok but it is a 1987 part after all, cheap check get it idling and spray carb cleaner at it, if the rpm's change you have a problem, my guess is not really likely
my 87 had a similar problem as not exactly the same and my brother had his Motoplat being intermittent, how we fixed them was to add a wire between the ignition and the coil to eliminate the grounding issues of the engine to frame to coil, it can be a 16ga or 18ga just helped, the hardest thing an ignition system will do is create a clean spark at high load and low rpm such as heavy acceleration so if the coil is not getting clean power or it is in itself inherently weak you will get weak performance
try the wire it's cheap, I fed mine through the plastic sleeve with the other wires it takes time but looks better in the end, connect to a mag mount screw and a coil mount screw

what color is your coil wire???????????? red or black????
 
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