• 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.

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88 wr400 jetting and carb settings

Stretch

Stretch

Husqvarna
C Class
Hey guys, can't seem to locate any info on the standard carb settings in the manual or jet sizes, does anyone know what they are? or any info on the jets you run in yours would be much appreciated. It seems to be running really rich at the mo and want to get see how far off it is from base settings etc

Cheers
Andy
 
As I mentioned in another thread the manual doesn't have specs the bikes came with a sheet that had that stuff on them. I did a screen save and trimmed down page 203 from the 81-88 tech data on this site in the reference section. You might also look at page 95 for model year 1986 which uses a Q6 needle jet and 6dh3 needle.

I don't know what to say about 400 vs 430 this is under 88 430 which I have a wr but the spec calls 400 wr and xc while 430 for cr.
I don't have a 400. regardless of what it says here r=2 is what I find in the needle jet, That is what the 86 auto calls for. I did special order an r=0 but have yet to try it. I am pretty sure I have a 3.0 slide and the needle pretty far one way with the clip position but something else has been modified. Some of the other ones have more modern carbs.
 

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the 86 400 info is applicable
the difference between them is the clutch and transmission mainshaft
the top end carb and pipe are interchangeable, any liquid cooled 400 is the same
 
For your reference My 1983 XC500 has a 320 main and 45 pilot. Not sure what needle. Does 320 seem small for this bike? Seems to run out fine.
 
320 sounds small, but the bigger bores do seem to take smaller jets...my 88 250 runs well on a 460! it has had minor clean up porting and a muffler slickly adapted from a honda 250r quad, otherwise stock.
i would try the next bigger main to be safe...if it ran the same or better leave it in...im sure you would know if its too lean or not but i like to be safe..i richen the main until it starts to 4 stroke, then back it leaner until its right..
 
justintendo said:
320 sounds small, but the bigger bores do seem to take smaller jets...my 88 250 runs well on a 460! it has had minor clean up porting and a muffler slickly adapted from a honda 250r quad, otherwise stock.
i would try the next bigger main to be safe...if it ran the same or better leave it in...im sure you would know if its too lean or not but i like to be safe..i richen the main until it starts to 4 stroke, then back it leaner until its right..
Click to expand...


I'm putting a Lectron on it soon just wondered as i had it apart and looked at the jetting
 
Just pulled the carb to check the jets and everything seems as per the spec sheet apart from the main jet is a 410 rather than 400, so, guess that explains the running rich....ordering the 400 tomorrow, as it was still rich when I lowered the needle.... out of interest what increments do they tend to go up in and should this have made such a big difference? Just wondering as quite a while since I played with jets :)
 
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