• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st 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 The previous version was outdated and no longer supported.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!

Jetting question

Ruffus

Ruffus

Husqvarna
AA Class
Does jetting effect how smooth a motor operates?

Took a little half hour each way highway ride today to get my ears lowered. The bike was at least twice as smooth as normal. I'm guessing it's because riding temp was 40 & my jetting is slightly on the rich side.

Am I right in my assumption on jetting or is it just an odd coincidence?
Riding home I'm thinking I could ride pavement for hours easy if it was always this smooth. Just a wee bit cold with the wind chill factor :)
 
Well in my experience lean is mean. I was using a LCD-1 to jet and although I was at 13.1 from bottom to top it was abrasive. I richened it a tad across the board. Smooth as butter
 
It felt like a different engine, smooth, crisp instant throttle response, more seat of the pants power, usually I hear the engine most while riding, today, just the hum of the knobbies.
Seat, footpeg, & grip vibration much reduced. :excuseme:
 
Hey Guys, I'm getting a ping or a knock when I'm just cruising on the road, like if I don't downshift up a corner. I rarely go over 45 or 50 on the road to get to the dirt. I don't notice it so much when I'm on dirt. I think I tend to keep the rpm's higher. Think it's jetting, fuel, or I'm not riding it right????
'07 TE 250 running stock jetting and premium gas from sea level to about 4,000 ft. I went up a tooth in the front to lower the rpm's on the road.
 
Thanks, I run the highest octane I can find, but then, I'm in SoCal and maybe all the low emissions stuff in the fuel is an issue. I'm all stock on the jetting, think I should start by playing with the air mixture?
 
Ruffus said:
Does jetting effect how smooth a motor operates?
Click to expand...
Absolutely.

It should be smooth as butter with oodles of power when you twist the throttle. If not the jetting can be changed to make it that way.

It could well be as the bikes get older then the jetting requirements change. I just spent quite a bit of time over a few weekends changing my jetting
from: James Dean blue needle with 2 marks above the clip, 38 pilot, fuel screw all the way in, 45 leak, with no "o-ring" on the AP arm,
to: James Dean red needle with 4? marks above the clip, 48 pilot with , fuel screw 3.5 turns out, 55 leak, with an "o-ring" on the AP arm - and it still needs a larger pilot jet cause I am over 2.5 turns out on the pilot screw.

The reason it took me so much time to re-jet - I could not believe such a massive change was required, but that could be because I also changed the float valve and float/fuel height in the fuel bowl (bike start leaking fuel when tipped at about 45 degrees, which is what I like).
 
Ron West said:
..I'm all stock on the jetting, think I should start by playing with the air mixture?
Click to expand...
Personally I like to locate the throttle position where the trouble occurs, then pull out the choke & hot start to try to ascertain if it is lean or rich at that throttle setting..
 
Coffee said:
Absolutely.

It should be smooth as butter with oodles of power when you twist the throttle. If not the jetting can be changed to make it that way.

It could well be as the bikes get older then the jetting requirements change. I just spent quite a bit of time over a few weekends changing my jetting
from: James Dean blue needle with 2 marks above the clip, 38 pilot, fuel screw all the way in, 45 leak, with no "o-ring" on the AP arm,
to: James Dean red needle with 4? marks above the clip, 48 pilot with , fuel screw 3.5 turns out, 55 leak, with an "o-ring" on the AP arm - and it still needs a larger pilot jet cause I am over 2.5 turns out on the pilot screw.

The reason it took me so much time to re-jet - I could not believe such a massive change was required, but that could be because I also changed the float valve and float/fuel height in the fuel bowl (bike start leaking fuel when tipped at about 45 degrees, which is what I like).
Click to expand...

Thanks Dean. I'll ummmm have to get someone to decipher that though :doh:. I need to find someone who knows how to change the jetting. I have no clue. Never done it. Pilot, leak, red needle is all a foreign language to me. Looking at the stuff in my "JD" kit I don't know how to differentiate one from another.

Any chance you made an instructional video? :popcorn:
 
Ruffus said:
Thanks Dean. I'll ummmm have to get someone to decipher that though :doh:. I need to find someone who knows how to change the jetting. I have no clue. Never done it. Pilot, leak, red needle is all a foreign language to me. Looking at the stuff in my "JD" kit I don't know how to differentiate one from another.

Any chance you made an instructional video? :popcorn:
Click to expand...


Put my glasses on & found the "RED" needle, so my bike has the blue in it.
 
Ruffus said:
Put my glasses on & found the "RED" needle, so my bike has the blue in it.
Click to expand...
That really does not indicate what needle is in your bike... could be anything. I encourage you to disassemble the carb and find out - especially the leak jet in the bottom of the bowl.
 
Coffee said:
That really does not indicate what needle is in your bike... could be anything. I encourage you to disassemble the carb and find out - especially the leak jet in the bottom of the bowl.
Click to expand...

True, Just looked at the JD kit parts list & assumed since the blue is missing :D

I know, I know, never assume anything. But how do you decide which jet's to go with? Or which clip on the needle? & what effect do the different needle positions have?
 
Ruffus said:
True, Just looked at the JD kit parts list & assumed since the blue is missing :D

I know, I know, never assume anything. But how do you decide which jet's to go with? Or which clip on the needle? & what effect do the different needle positions have?
Click to expand...
First of all, you need to actually open up the carb and see what jets are in there - because if I recall correctly, we have had this conversation before... and you still have not opened up the carb after all these years.

To set the pilot - put your bike on a bike stand and adjust the fuel screw for max rpm. If your pilot jet is way off then you should be able to tell that by how much choke you need to use (if any) when the bike is cold and first started.
 
Coffee said:
First of all, you need to actually open up the carb and see what jets are in there - because if I recall correctly, we have had this conversation before... and you still have not opened up the carb after all these years.

To set the pilot - put your bike on a bike stand and adjust the fuel screw for max rpm. If your pilot jet is way off then you should be able to tell that by how much choke you need to use (if any) when the bike is cold and first started.
Click to expand...


Don't think I've ever discussed jetting before, always thought it was great & had no need to mess with jetting, bike never failed to start at any time & temperature. Just a realization of how much smoother it ran in 40 degree weather. I'm even on the original battery.
 
Ruffus said:
Don't think I've ever discussed jetting before, always thought it was great & had no need to mess with jetting, bike never failed to start at any time & temperature. Just a realization of how much smoother it ran in 40 degree weather. I'm even on the original battery.
Click to expand...
I may have been thinking of someone else.. I do tend to type (and hopefully help) a lot.

But as a general statement, I do encourage people to play with their bikes jetting - to make it all that it can be. :)
 
You must log in or register to reply here.
Back
Top