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 The previous version was outdated and no longer supported.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

JD Tuner settings

So I'm confused about what each zone represents. Is it throttle position or RPM? There is not X or Y axis labels on the demo, and the only explanation I saw was this:

For illustration purposes the graph shows the natural progression through the zones for one gear, as you might see while measuring power in a dynamometer run

Also, I understand that yellow/blue adjusts the switch point between Green and Yellow, but I'm not sure I understand "why" you would want it up or down (and related to the earlier question: up or down what exactly?) Is it to suit specific riding needs or do certain set ups require the transition to be different?

Thanks for your help, I was never a carb tuner either, so the explanations that translate the EFI tuner to "needle vs mains" just confuses me more.
 
You've got 6 settings. 4 of them are RPM based and control fuel delivery based in your current RPM:

Green/Blue: Idle
Green: Low
Yellow: Middle
Red: High

Then you have two settings that basically drive how quickly you move between RPM ranges given above:

Yellow/Blue: how quickly you transition between green & yellow - lower value means your RPM value that switches you from green to yellow fuel values is lower

Red/Blue: I'm not entirely sure how to explain this one. It is referred to as the accelerator setting. I believe it controls how much fuel gets dumped in quick wide-open-throttle situations.

That is my understanding of how it works. Correct me if I'm wrong.
 
I wonder how many run just the FMF Q4 with PU and no fuel tuner. SilverBullet does for one. I just installed the FMF stuff and made a run to breakfast this morning; the bike ran just fine with no obvious fueling issues. I'm sure that the tuner, whether JD, FMF or PC, would boost the power but if one is happy without the fuel tuner, is there a reason to add one? It feels like the bike will run fine as is, and my main reason to change the exhaust system was to loose some weight. I can tell it's gone, too.
 
Kenneth Webb said:
I wonder how many run just the FMF Q4 with PU and no fuel tuner. SilverBullet does for one. I just installed the FMF stuff and made a run to breakfast this morning; the bike ran just fine with no obvious fueling issues. I'm sure that the tuner, whether JD, FMF or PC, would boost the power but if one is happy without the fuel tuner, is there a reason to add one? It feels like the bike will run fine as is, and my main reason to change the exhaust system was to loose some weight. I can tell it's gone, too.
Click to expand...
I gotta be honest with you, I could probably live without mine. As you can see by my settings, I'm pretty close to stock as it is.
 
Kenneth Webb said:
I wonder how many run just the FMF Q4 with PU and no fuel tuner. SilverBullet does for one. I just installed the FMF stuff and made a run to breakfast this morning; the bike ran just fine with no obvious fueling issues. I'm sure that the tuner, whether JD, FMF or PC, would boost the power but if one is happy without the fuel tuner, is there a reason to add one? It feels like the bike will run fine as is, and my main reason to change the exhaust system was to loose some weight. I can tell it's gone, too.
Click to expand...

I've got huge lean spots I use the JD to clear.
I love my bike, but wouldn't w/o the tuner. Admittedly, I'm picky.
 
Running the stock cans converted to flow-through (except retaining the stock sparky) the JD provides a very large boost in the midrange. I would think that the FMF would flow even better and be even more suited to the extra fuel from the tuner.
 
Before and after tuner. Before tuner I couldn't use sixth gear below 55mph (herky, jerky), now it pulls from under 50 smoothly. As JG said, I love my bike but wouldn't without the tuner.

File0029a-1.jpg


.
 
johngil said:
I've got huge lean spots I use the JD to clear.
I love my bike, but wouldn't w/o the tuner. Admittedly, I'm picky.
Click to expand...
I read that Jtemple has the EHS prefilter, meaning more fuel needed for the additional air. John, how is your bike set up? EHS or other for more air in? I can definitely see that the tuner is needed when the engine can breathe better. It's gotta be choked down a lot with that small inlet snorkel. I was thinking of leaving things alone until I added the EHS, if I do.

I have a new FMF can for my WRR, along with all the stuff to make it work, but am saving the dollars for a PCV and Autotune. On that bike, I need all the extra power I can get since it's only a 250. Of course the Husky would be more fun with more HP, but I will trade HP for better fuel consumption as I use it for long distance where gas availability is an issue. I don't want to get down into the 30's mpg range.
 
DYNOBOB said:
Before and after tuner. Before tuner I couldn't use sixth gear below 55mph (herky, jerky), now it pulls from under 50 smoothly. As JG said, I love my bike but wouldn't without the tuner.

.
Click to expand...
That's pretty impressive! I have the same issue with sixth gear, below 50 as I am now geared. Looks like the curve with the PCV smooths out a lot too, for both torque and HP. I may have to reconsider....
 
Kenneth Webb said:
I read that Jtemple has the EHS prefilter, meaning more fuel needed for the additional air. John, how is your bike set up? EHS or other for more air in? I can definitely see that the tuner is needed when the engine can breathe better. It's gotta be choked down a lot with that small inlet snorkel. I was thinking of leaving things alone until I added the EHS, if I do.

I have a new FMF can for my WRR, along with all the stuff to make it work, but am saving the dollars for a PCV and Autotune. On that bike, I need all the extra power I can get since it's only a 250. Of course the Husky would be more fun with more HP, but I will trade HP for better fuel consumption as I use it for long distance where gas availability is an issue. I don't want to get down into the 30's mpg range.
Click to expand...

My bike has a Q4 exhaust, closed loop, and air box bullshit removed. 14/44 or 15/46 gearing.
 
The last two times I checked mileage I got 50 and 52mpg. Worst I've ever seen was 47. I'm not an aggressive, high rpm rider though.
 
Kenneth Webb said:
I read that Jtemple has the EHS prefilter, meaning more fuel needed for the additional air. John, how is your bike set up? EHS or other for more air in? I can definitely see that the tuner is needed when the engine can breathe better. It's gotta be choked down a lot with that small inlet snorkel. I was thinking of leaving things alone until I added the EHS, if I do.

I have a new FMF can for my WRR, along with all the stuff to make it work, but am saving the dollars for a PCV and Autotune. On that bike, I need all the extra power I can get since it's only a 250. Of course the Husky would be more fun with more HP, but I will trade HP for better fuel consumption as I use it for long distance where gas availability is an issue. I don't want to get down into the 30's mpg range.
Click to expand...
I do not have the prefilter in any more. I wasn't happy with the amount of water it was letting in.
 
There are more than just a few Dyno Jet tuning centers here in Houston, so the PC-V makes sense. I'll call around and find one that is familiar with FI dirt bikes. Most seem to be oriented toward cruisers and Harleys. Shouldn't make a lot of difference though if the techs are up to speed. It would be fun to run the bike to the makers in Las Vegas, but it's just too far to make sense. But then, I could get in a little winter riding in Nevada if I did that. Hmmm.
 
jtemple said:
I do not have the prefilter in any more. I wasn't happy with the amount of water it was letting in.
Click to expand...

I'm also not very happy with how quick the prefilters wear out. I got a replacement and will try some water proofing products on the old one. The guys at EHS said its not a good idea, but that's so you'll buy a new one. REI or EMS carry some really good stuff that will allow for breathing / wicking and still block water. I'll post up the results.
 
1lunger said:
I'm also not very happy with how quick the prefilters wear out. I got a replacement and will try some water proofing products on the old one. The guys at EHS said its not a good idea, but that's so you'll buy a new one. REI or EMS carry some really good stuff that will allow for breathing / wicking and still block water. I'll post up the results.
Click to expand...
I wonder if that tech wash stuff you use on jackets and stuff would work.
 
You must log in or register to reply here.
Back
Top