product test - JD Jetting

[D***@msn.com]

I've got a 2005 CR250R, after fighting jetting and spending a fair
amount of money on OEM needles I decided to buy the JD Jetting kit.
Initially I was shocked as to how lean the needle looked compared to
all the OEM ones. I always thought the bike was running fat on jetting
but not this fat when comparing JD and OEM needls.

The kit contains a pilot, several mains and two needles and good
instructions. Essentially he runs the same pilot at all elevations, the
main is determined primarily by your riding elevation, and he gives you
a starting point on what needle to use. The needles were identical
except that they are a half step different on the clip position.

I was a liitle worried even to the point of wondering if there was an
error in my kit since the needles looked so lean compared to OEM. I
went ahead and set it up by his recomendation.

Results: I couldn't be happier. The bike builds gradual controllable
power, the mid range burst is smoothed out. It resembles the old Honda
powerband of old that everyone raves about. Instead of sounding on the
verge of loading up, the motor sounds really crisp and sharp. So much
so that I later went 1/2 step richer on the needle than recommened as a
starting point. I am runnig at 5000-6000 ft elevation.

I would recommend this kit. After owning various bikes and having
assorted "bolt ons" on these bikes this jetting changed this bikes
personality more than any single mod I have ever done. A friend rode my
bike after the jetting changes and like it much better too.

I am not affiliated with JD Jetting but am a very pleased customer.

-Dave-

[Yosef - '02 200exc & '04 MTD 38 (my quad)]

When I had "Clay's Head Mod" done to my '02 200e I had to completely
rejet from scratch.

The advantage, to me, of the JD jetting kit were the two needles that
eliminated the need to search for the "perfect" needle - also, as I
understand it, when I go from Red/3 (red needle, third slot from the
top) to Blue/3 it's the same as richening the Red needle one half slot.

-Joe "Wellen" Dowd

[David Kelly]

Post by Yosef - '02 200exc & '04 MTD 38 (my quad)
When I had "Clay's Head Mod" done to my '02 200e I had to completely
rejet from scratch.
The advantage, to me, of the JD jetting kit were the two needles that
eliminated the need to search for the "perfect" needle - also, as I
understand it, when I go from Red/3 (red needle, third slot from the
top) to Blue/3 it's the same as richening the Red needle one half slot.

That may be the case with the CR kit, but in the KTM kits the red needle
is the high-temperature high-altitude needle. The taper is leaner in the
low throttle openings. I happen to prefer the red needle at 1000' and
all temperatures. Has been a couple of years so maybe I ought to try the
blue needle again sometime. Anyway that's why there are two needles,
that one can select the one that works for you.

[Yosef - '02 200exc & '04 MTD 38 (my quad)]

Post by David Kelly

Post by Yosef - '02 200exc & '04 MTD 38 (my quad)
The advantage, to me, of the JD jetting kit were the two needles that
eliminated the need to search for the "perfect" needle - also, as I
understand it, when I go from Red/3 (red needle, third slot from the
top) to Blue/3 it's the same as richening the Red needle one half slot.

That may be the case with the CR kit, but in the KTM kits the red needle
is the high-temperature high-altitude needle. The taper is leaner in the
low throttle openings. I happen to prefer the red needle at 1000' and
all temperatures. Has been a couple of years so maybe I ought to try the
blue needle again sometime. Anyway that's why there are two needles,
that one can select the one that works for you.

Excerpts from the instructions that came with my KTM (Keihin) jet kit:

BLUE MARKED NEEDLE (Richer 0-1/4 throttle,...

RED MARKED NEEDLE (Leaner 0-1/4 throttle)

***Note: The suggested sequence to test the jetting from richer to
leaner is Blue #4, Red#4, Blue #3, Red #3, Blue #2, Red #2.

-Wellen

[D***@msn.com]

Post by Yosef - '02 200exc & '04 MTD 38 (my quad)
When I had "Clay's Head Mod" done to my '02 200e I had to completely
rejet from scratch.
The advantage, to me, of the JD jetting kit were the two needles that
eliminated the need to search for the "perfect" needle - also, as I
understand it, when I go from Red/3 (red needle, third slot from the
top) to Blue/3 it's the same as richening the Red needle one half slot.
-Joe "Wellen" Dowd

The kit I had indicated the same in regards to needles.

-Dave-

[Eat Dirt]

Post by D***@msn.com
I've got a 2005 CR250R, after fighting jetting and spending a fair
amount of money on OEM needles I decided to buy the JD Jetting kit.
Initially I was shocked as to how lean the needle looked compared to
all the OEM ones. I always thought the bike was running fat on jetting
but not this fat when comparing JD and OEM needls.
The kit contains a pilot, several mains and two needles and good
instructions. Essentially he runs the same pilot at all elevations, the
main is determined primarily by your riding elevation, and he gives you
a starting point on what needle to use. The needles were identical
except that they are a half step different on the clip position.
I was a liitle worried even to the point of wondering if there was an
error in my kit since the needles looked so lean compared to OEM. I
went ahead and set it up by his recomendation.
Results: I couldn't be happier. The bike builds gradual controllable
power, the mid range burst is smoothed out. It resembles the old Honda
powerband of old that everyone raves about. Instead of sounding on the
verge of loading up, the motor sounds really crisp and sharp. So much
so that I later went 1/2 step richer on the needle than recommened as a
starting point. I am runnig at 5000-6000 ft elevation.
I would recommend this kit. After owning various bikes and having
assorted "bolt ons" on these bikes this jetting changed this bikes
personality more than any single mod I have ever done. A friend rode my
bike after the jetting changes and like it much better too.
I am not affiliated with JD Jetting but am a very pleased customer.
-Dave-

How much was the kit? Do they sell the kit for other brands too?

[Miko the pooch]

Post by Eat Dirt
How much was the kit? Do they sell the kit for other brands too?

http://jdjetting.server304.com/

bruno.

[D***@msn.com]

Post by Eat Dirt
How much was the kit? Do they sell the kit for other brands too?

They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

-Dave-

[IdaSpode]

Post by D***@msn.com

Post by Eat Dirt
How much was the kit? Do they sell the kit for other brands too?

They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Post by D***@msn.com
-Dave-

IdaJetSetter

[Eat Dirt]

Post by IdaSpode

Post by D***@msn.com

Post by Eat Dirt
How much was the kit? Do they sell the kit for other brands too?

They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Post by D***@msn.com
-Dave-

IdaJetSetter

Sure, it isn't cheap but then again buying several needles and still not
having your problem resolved may cost more. These guys provide support
and that is worth the extra few bucks for the kit, I would think.
Playing with the needles in my case didn't solve my problem and I ended
up spending way more money on new plugs as a result. Unfortunately the
dude at the parts store or sometimes even your buddies at the track
aren't good candidates for helping solve a (very annoying) problem like
jetting.

[DirtCrashr]

Post by Eat Dirt

Post by IdaSpode

Post by D***@msn.com
They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Post by D***@msn.com
-Dave-

IdaJetSetter

Sure, it isn't cheap but then again buying several needles and still not
having your problem resolved may cost more. These guys provide support
and that is worth the extra few bucks for the kit, I would think.
Playing with the needles in my case didn't solve my problem and I ended
up spending way more money on new plugs as a result. Unfortunately the
dude at the parts store or sometimes even your buddies at the track
aren't good candidates for helping solve a (very annoying) problem like
jetting.

Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.

DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

[Eat Dirt]

Post by DirtCrashr

Post by Eat Dirt

Post by IdaSpode

Post by D***@msn.com
They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Post by D***@msn.com
-Dave-

IdaJetSetter

Sure, it isn't cheap but then again buying several needles and still not
having your problem resolved may cost more. These guys provide support
and that is worth the extra few bucks for the kit, I would think.
Playing with the needles in my case didn't solve my problem and I ended
up spending way more money on new plugs as a result. Unfortunately the
dude at the parts store or sometimes even your buddies at the track
aren't good candidates for helping solve a (very annoying) problem like
jetting.

Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.
DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

with our extreme temp changes and high elevation, jetting can be an
issue. One day you could be racing in the snow and the next week at
close to 30C (that's Celsius, yes) - and yes, this very scenario
happened just this past month with our 4 weekend series.
Nothing worse than a bike that lacks power especially when approaching a
jump you know you need the power to clear.

[DirtCrashr]

Post by Eat Dirt

Post by DirtCrashr

Post by Eat Dirt

Post by IdaSpode

Post by D***@msn.com
They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.

Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Post by D***@msn.com
-Dave-

IdaJetSetter

Sure, it isn't cheap but then again buying several needles and still not
having your problem resolved may cost more. These guys provide support
and that is worth the extra few bucks for the kit, I would think.
Playing with the needles in my case didn't solve my problem and I ended
up spending way more money on new plugs as a result. Unfortunately the
dude at the parts store or sometimes even your buddies at the track
aren't good candidates for helping solve a (very annoying) problem like
jetting.

Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.
DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

with our extreme temp changes and high elevation, jetting can be an
issue. One day you could be racing in the snow and the next week at
close to 30C (that's Celsius, yes) - and yes, this very scenario
happened just this past month with our 4 weekend series.
Nothing worse than a bike that lacks power especially when approaching a
jump you know you need the power to clear.

I don't jump, or race, especially if its cold.

DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

[Eat Dirt]

Post by DirtCrashr

Post by Eat Dirt
with our extreme temp changes and high elevation, jetting can be an
issue. One day you could be racing in the snow and the next week at
close to 30C (that's Celsius, yes) - and yes, this very scenario
happened just this past month with our 4 weekend series.
Nothing worse than a bike that lacks power especially when approaching a
jump you know you need the power to clear.

I don't jump, or race, especially if its cold.

And yet you manage to crash?
"hey Mr. park ranger sir - i don't know what happened - that tree just
jumped into my way"

[DirtCrashr]

Post by Eat Dirt

Post by DirtCrashr
I don't jump, or race, especially if its cold.

And yet you manage to crash?
"hey Mr. park ranger sir - i don't know what happened - that tree just
jumped into my way"

Sure why not? You just have to want it, then you find a way.
On the street too - but that's always more expensive in so many
different ways.

DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

[Eat Dirt]

Post by DirtCrashr

Post by Eat Dirt

Post by DirtCrashr
I don't jump, or race, especially if its cold.

And yet you manage to crash?
"hey Mr. park ranger sir - i don't know what happened - that tree just
jumped into my way"

Sure why not? You just have to want it, then you find a way.
On the street too - but that's always more expensive in so many
different ways.
DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

Yep, once I crashed my dirt bike on the way to work in downtown, taking
a corner like I was on a sport bike. The cost to the bike was minimum.
the scars I got as a reminder is priceless. So yes, crashing on tarmac
has a price.

A friend, on his first time trail riding with me managed to hit a tree
that had apparently jumped on his path. Broke his rad. So yeah, even
trail riders get to crash too (and I can testify to that on my many
crashes there) but compared to mx racing, it is to me a mute point. I
mean, mx is simply carnage. Plain and simple. oh and yeah, I have
several scars to prove that too (and a brace on my hand as type this)

I had to bring this up as your nick would be better suited for someone
that races mx. Do you realize one of the most rare things to find is a
racer that hasn't broken a bone?

[DirtCrashr]

Post by Eat Dirt

Post by DirtCrashr
Sure why not? You just have to want it, then you find a way.
On the street too - but that's always more expensive in so many
different ways.
DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

Yep, once I crashed my dirt bike on the way to work in downtown, taking
a corner like I was on a sport bike. The cost to the bike was minimum.
the scars I got as a reminder is priceless. So yes, crashing on tarmac
has a price.

I was wearing Dainese leathers each time I threw my sportbike down the
road at speed. :-) In downtown areas you have a lot of slippery crap
and construction to worry about, around here they use huge steel
plates to cover gaping holes.

The weight and speed of those bikes, and the cost of snapped
handlebars and plastic eventually put me out of that sport on a
cost-basis. My dual-sport bike preserved road-riding for a while, and
I even had a CB-1000 briefly after our Edelweiss European trip through
the Alps. It was fun having dirt-road skills to smoke a bunch of
street fast-guys on a gravel road down the back of the Paso Del
Seilvio.
http://maps.google.com/maps?f=l&hl=en&q=%22stilfser+joch%22+italy&ie=UTF8&near=&sll=46.421766,11.195068&sspn=0.022631,0.03356&ll=46.530997,10.460358&spn=0.090344,0.134239&t=h&om=1

But the US is not Switzerland or the Northern Italy and the Dolomites
with each bit of scenic wonderland preserved close at hand easily
accessible - it's a long, hot, and dull ride across miles of flat
farmland before you get to another set of mountains - and two-up on
the big Honda became very infrequent.

Post by Eat Dirt
A friend, on his first time trail riding with me managed to hit a tree
that had apparently jumped on his path. Broke his rad. So yeah, even
trail riders get to crash too (and I can testify to that on my many
crashes there) but compared to mx racing, it is to me a mute point. I
mean, mx is simply carnage. Plain and simple. oh and yeah, I have
several scars to prove that too (and a brace on my hand as type this)

Trees, big rocks, loose gravel, babyheads, jagged stumps, manzanita -
what matters most is a good solid point of contact.
Typically I lose the front over something, possibly with a death-grip
on the front brake, or deflect off something and go off trail. When
the trail is inches wide it's sometimes easy to deflect-off when your
suspension has too much rebound damping dialed-in.

Post by Eat Dirt
I had to bring this up as your nick would be better suited for someone
that races mx. Do you realize one of the most rare things to find is a
racer that hasn't broken a bone?

Does four ribs count? The *one* time I was on an MX track...

DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

[Yosef - '02 200exc & '04 MTD 38 (my quad)]

Post by DirtCrashr
Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.

That's the good ole american spirit!!

Reminds me of a line in "12 Angry Men" - "If you think too much you get
a headache."

After all - if you never try, quitting doesn't become an issue does it?

-Wellen

[DirtCrashr]

On 10 Jun 2006 10:31:57 -0700, "Yosef - '02 200exc & '04 MTD 38 (my

Post by Yosef - '02 200exc & '04 MTD 38 (my quad)

Post by DirtCrashr
Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.

That's the good ole american spirit!!
Reminds me of a line in "12 Angry Men" - "If you think too much you get
a headache."
After all - if you never try, quitting doesn't become an issue does it?
-Wellen

I tried jetting once, it made the bike too powerful!
I never quit, I always got laid-off.

DirtCrashr - '97KTM300M/XC, '99BetaTechno
'44 M1 Garand, '43 National Postal Meter

[Yosef - '02 200exc & '04 MTD 38 (my quad)]

Post by DirtCrashr
Why bother fussing with jetting? It's never gonna be prefect.
I left mine alone and just rode - besides I'm more likely to screw it
up including losing things, than to make it better, and it won't help
my riding anyhow.

Besides, it's not like we mere humans can figure out something so
complex - it must be the result of "intelligent design."

[David Kelly]

Post by IdaSpode
Sixty bucks for a couple of needles and jets? I think I'm going to
scratch the numbers off some needles and put out a DJ Kit...

Before James Dean was selling jetting kits he started by selling an
Excel-compatible database and spreadsheet for comparing the effect of
needle, throttle slide, main jet, air jets, and pilot jets. The database
portion included the dimensions of most Keihin and Mikuni needles. Later
versions included the dimensions of his own needles.

Using his spreadsheet one could see the JD KTM Red #5 was pretty close
to the same as Blue #3 at low throttle positions.

http://jdjetting.server304.com/

In particular this item for only $25"
http://jdjetting.server304.com/xcart/product.php?productid=27&cat=2&page=
1

In online forums JD has not been shy in specifying Keihin needles which
are close to the dimensions and tapers of his own.

[Eat Dirt]

Post by D***@msn.com

Post by Eat Dirt
How much was the kit? Do they sell the kit for other brands too?

They had various brands, mostly for 4 ( ack, cough, cough) strokes. I
got mine from Thumper racings website and had a 10% off e-coupon. I
think is was $60.
-Dave-

That's not bad considering that I paid US12 for a single needle that
didn't solve my problem. I like how they provide guidance, something the
guys are our local shops don't. My new bike is running great but the one
it replaced hadn't. Had major problems with fouling and I wish I knew of
this kit at the time. The new owner of the bike may actually want to
look into it.

[spodely]

Post by Eat Dirt
That's not bad considering that I paid US12 for a single needle that
didn't solve my problem. I like how they provide guidance, something the
guys are our local shops don't. My new bike is running great but the one
it replaced hadn't. Had major problems with fouling and I wish I knew of
this kit at the time. The new owner of the bike may actually want to
look into it.

Next time, don't spend the money if you don't know what you're doing. You
have learned to ride it, haven't you? Or do you just eat the dirt and
pretend?

If you were in the US and visiting local shops, you might have had some help
with that problem instead of getting metric needles that don't work.

[Eat Dirt]

Post by spodely

Post by Eat Dirt
That's not bad considering that I paid US12 for a single needle that
didn't solve my problem. I like how they provide guidance, something the
guys are our local shops don't. My new bike is running great but the one
it replaced hadn't. Had major problems with fouling and I wish I knew of
this kit at the time. The new owner of the bike may actually want to
look into it.

Next time, don't spend the money if you don't know what you're doing. You
have learned to ride it, haven't you? Or do you just eat the dirt and
pretend?
If you were in the US and visiting local shops, you might have had some help
with that problem instead of getting metric needles that don't work.

Yes, because we all know that the clerks at bike shops in the US are so
much more knowledgeable than the Canadian clerks.