ReJetting Survey?

Beamster · Post by **Beamster** » Fri Jun 25, 2010 3:35 am

It would be very informative if those who have experimented with rejetting solutions for various upgrades create a database of knowledge to share.
It would make for a good starting point for others trying to diagnose running issues.

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 3:46 am

Due to differing elevations this wouldn't work

Beamster · Post by **Beamster** » Fri Jun 25, 2010 3:57 am

We have such information on our Triumph motorcycle forum and it is of great value.
I have to think that all Buddys come with the same standard jetting for the whole country, so except for extremes in geography, similar jetting for similar mods should be in the general ballpark.

toycoma98 · Post by **toycoma98** » Fri Jun 25, 2010 4:01 am

PGO Metro 125cc

CDI and Coil upgrade
Emissions removed
Prima Exhaust
UNI slanted filter directly on the carb
NCY transmission kit
9g Dr. pulley sliders

103 JET

105 jet was too rich (black sparkplug)
100 jet was too lean (greyish sparkplug)
So i went in between with the 103!

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 4:18 am

Beamster wrote:Sure it could.
We have such information on our Triumph motorcycle forum and it is of great value.
I have to think that all Buddys come with the same standard jetting for the whole country, so except for extremes in geography, similar jetting for similar mods should be in the general ballpark.

Well, Kaos and I are 4000 ft apart and he is running crazy 130+ jets while im still at 120. Also, every scooter runs different and most are by no means tuned correctly from the factory

It's worth a try I guess but I doubt there will be enough varied info to make a difference

Here's mine

Buddy 125
161 cylinder kit
NCY big valve head
NCY high lift cam
Prima exhaust
Uni filter intake
NCY high tension coil
CDI

Tuned via wide band at a 119 jet, Elevation - 4700 ft. 55 degrees, low humidity

Beamster · Post by **Beamster** » Fri Jun 25, 2010 4:25 am

Scootertrash,

4700 feet is a geographical extreme, so your caution is well founded.
Most of us aren't lucky enough to have 4700 feet to deal with.

Thanks.

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 4:27 am

Beamster wrote:Scootertrash,

4700 feet is a geographical extreme, so your caution is well founded.
Most of us aren't lucky enough to have 4700 feet to deal with.

Thanks.

lol, i'm in the valley

Beamster · Post by **Beamster** » Fri Jun 25, 2010 4:33 am

ScooterTrash wrote: lol, i'm in the valley

Right, like the valley of Tuckerman's Ravine on Mount Washington.
They have to jet for wind there!

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 4:52 am

Beamster wrote:
ScooterTrash wrote: lol, i'm in the valley
Right, like the valley of Tuckerman's Ravine on Mount Washington.
They have to jet for wind there!

No, like we have a desert valley. at 4700 ft

gearhead · Post by **gearhead** » Fri Jun 25, 2010 5:02 am

Here's mine

Running a little rich w/ Main jet 120

161 kit
150 big valve head
Uni foam air filter
Prima header piece with FMF shorty can
Dr pulley variator w/ 11g sliders

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 5:07 am

gearhead wrote:Here's mine

Running a little rich w/ Main jet 120

161 kit
150 big valve head
Uni foam air filter
Prima header piece with FMF shorty can
Dr pulley variator w/ 11g sliders

Variators have nothing to do with jetting

Syd · Post by **Syd** » Fri Jun 25, 2010 5:16 am

ScooterTrash wrote:
Beamster wrote:Scootertrash,

4700 feet is a geographical extreme, so your caution is well founded.
Most of us aren't lucky enough to have 4700 feet to deal with.

Thanks.
lol, i'm in the valley

Flatlanders. Bah!

Beamster · Post by **Beamster** » Fri Jun 25, 2010 5:47 am

Syd wrote: Flatlanders. Bah!

Yea, but there's no surf up there.

jmkjr72 · Post by **jmkjr72** » Fri Jun 25, 2010 2:06 pm

maybe there needs to be a page like they do over on stella speed

buddy stats a great log of parts and jetting

ScooterTrash · Post by **ScooterTrash** » Fri Jun 25, 2010 2:12 pm

Beamster wrote:
Syd wrote: Flatlanders. Bah!

Yea, but there's no surf up there.

Well the average daily wind is 20-30 mph so sometimes the lakes have big waves

Post by **Lostmycage** » Fri Jun 25, 2010 2:25 pm

jmkjr72 wrote:maybe there needs to be a page like they do over on stella speed

buddy stats a great log of parts and jetting

I tried that once... I think it turned into a discussion about wind and valleys or something like that...

rajron · Post by **rajron** » Fri Jun 25, 2010 2:52 pm

This is a good idea; please put the data in chart form if you can.

We are at over 5,000 ft here.
With a 161cc kit, stock head, Prima pipe, and modified air box I’m running about 118 main jet. For me it was the air box modification that created the biggest unbalance from stock setup.
Oh, we are windy, but not as bad as ID.

Kaos · Post by **Kaos** » Fri Jun 25, 2010 3:11 pm

While I agree with Scootertrash that I'm not super sure this will actually help anyone, its worth a shot

700ft Elevation:

58.5mm cylinder
58.5mm high compression dome-top piston
ported/polished stock head
A8 camshaft
Polished and shimmed stock carb
Prima exhaust
Unifilter on the end of the stock intake tube.

k135 mainjet k38 idle.

Mr Miller · Post by **Mr Miller** » Fri Jun 25, 2010 3:30 pm

Wow I am only running a 100 jet:-/
At 650ft
Check sig for parts, but the main one is the 171.3 big bore

The dealer that did the install said he tried a few different jets and the 100 ran the most consistent. Seems pretty low compared to you guys.
But it runs smooth so I guess it is fine:)

Beamster · Post by **Beamster** » Fri Jun 25, 2010 3:31 pm

Lostmycage wrote:
jmkjr72 wrote:maybe there needs to be a page like they do over on stella speed

buddy stats a great log of parts and jetting
I tried that once... I think it turned into a discussion about wind and valleys or something like that...

Valleys, wind, humidity, elevation......what could those possibly have to do with carburetion ....

Keys · Post by **Keys** » Fri Jun 25, 2010 11:30 pm

Beamster wrote:Scootertrash,

4700 feet is a geographical extreme, so your caution is well founded.
Most of us aren't lucky enough to have 4700 feet to deal with.

Thanks.

Whoa! 4700 feet is extreme?? I grew up at 9000 and always thought anyone who resided below 7000 ft. was flat-lander...

--Keys

Beamster · Post by **Beamster** » Fri Jun 25, 2010 11:36 pm

Keys wrote:
Beamster wrote:Scootertrash,

4700 feet is a geographical extreme, so your caution is well founded.
Most of us aren't lucky enough to have 4700 feet to deal with.

Thanks.
Whoa! 4700 feet is extreme?? I grew up at 9000 and always thought anyone who resided below 7000 ft. was flat-lander...

--Keys

Do you need an oxygen tank for combustion up there?

ScooterTrash · Post by **ScooterTrash** » Sat Jun 26, 2010 1:19 am

Mr Miller wrote:Wow I am only running a 100 jet:-/
At 650ft
Check sig for parts, but the main one is the 171.3 big bore

The dealer that did the install said he tried a few different jets and the 100 ran the most consistent. Seems pretty low compared to you guys.
But it runs smooth so I guess it is fine:)

Your mechanics tuning methods are terrible. You will make more power when it's lean but also hotter = hole in piston. Tuning by what "feels" best is no where near proper.

This method will get you close but not exact (unless you're lucky)

Beamster · Post by **Beamster** » Sat Jun 26, 2010 2:42 am

Some good information guys. More suitable for the higher elevations, but good all the same.
Will tabulate and see if it makes sense.

JettaKnight · Post by **JettaKnight** » Tue Jun 29, 2010 4:31 am

Alright, I'll play along.

161cc
Full sized cylinder head
Airbox baffle removed
Larger NCY intake manifold
Prima muffler

117 jet

If I install the airbox baffle, it bogs down heavily.

Mr Miller · Post by **Mr Miller** » Tue Jun 29, 2010 4:48 am

So could the fact that I have not touched the airbox be the reason why my voodoo jack seems to be running great with the 100 jet?!?

toycoma98 · Post by **toycoma98** » Tue Jun 29, 2010 4:57 am

Mr Miller wrote:So could the fact that I have not touched the airbox be the reason why my voodoo jack seems to be running great with the 100 jet?!?

I believe so...
That airbox is restricting the airflow so that 100 jet is just right with the air fuel mix, i guess.

I have a 103 jet and a slanted UNI filter directly on the carb.

ScooterTrash · Post by **ScooterTrash** » Tue Jun 29, 2010 6:22 am

Mr Miller wrote:So could the fact that I have not touched the airbox be the reason why my voodoo jack seems to be running great with the 100 jet?!?

yes

Beamster · Post by **Beamster** » Tue Jun 29, 2010 12:47 pm

In my motorcycle experiences and talk from others in that circle, it seems that a world of trouble is often created when messing with the intake end of things. Many people seem to revert to replacing the stock airboxes.
Some fuel injected vehicles, like our LS1 Chevy, seem to adjust themselves without intervention.

Cheshire · Post by **Cheshire** » Tue Jun 29, 2010 2:12 pm

Prima pipe
modified airbox: airbox baffle and intake hose removed
Mixture screw opened 1 full turn.

Earlier, ScooterTrash said you get a little more power running lean. I'm waffling between a 105 and 110...the 105 pushes harder, but the pipe sounds kinda hollow with it. The 110 sounds full-bodied, healthier...if that makes sense. The 105 has the plug a medium grey where the 110 has it black, so....

Main jet: 110

toycoma98 · Post by **toycoma98** » Tue Jun 29, 2010 9:09 pm

Cheshire wrote:Prima pipe
modified airbox: airbox baffle and intake hose removed
Mixture screw opened 1 full turn.

Earlier, ScooterTrash said you get a little more power running lean. I'm waffling between a 105 and 110...the 105 pushes harder, but the pipe sounds kinda hollow with it. The 110 sounds full-bodied, healthier...if that makes sense. The 105 has the plug a medium grey where the 110 has it black, so....

Main jet: 110

Go in between like a 107-108

I have a 103 jet

.

toycoma98 · Post by **toycoma98** » Tue Jun 29, 2010 9:12 pm

Beamster wrote:In my motorcycle experiences and talk from others in that circle, it seems that a world of trouble is often created when messing with the intake end of things. Many people seem to revert to replacing the stock airboxes.
Some fuel injected vehicles, like our LS1 Chevy, seem to adjust themselves without intervention.

Duh, fuel injected engines are controlled by a computer (ECU).

Carb just air+fuel being sucked in by the piston. Thats why you gotta get it right with the intake pipe, and the jet/s.

Beamster · Post by **Beamster** » Tue Jun 29, 2010 9:29 pm

toycoma98 wrote: Duh, fuel injected engines are controlled by a computer (ECU).

Duh yourself.
Don't you think we know our vette has a computer?

Try to be helpful, not condescending.

ScooterTrash · Post by **ScooterTrash** » Tue Jun 29, 2010 9:32 pm

Beamster wrote:
toycoma98 wrote: Duh, fuel injected engines are controlled by a computer (ECU).
Duh yourself.
Don't you think we know our vette has a computer?

Try to be helpful, not condescending.

In his defense (though condescending) you did make it sound like you had no idea why it would adjust itself

Beamster · Post by **Beamster** » Tue Jun 29, 2010 9:42 pm

Sccotertrash.
Read it again.

I'll stop wasting my time trying to help the uneducated.

Over and out.

ScooterTrash · Post by **ScooterTrash** » Tue Jun 29, 2010 10:03 pm

Beamster wrote:Sccotertrash.
Read it again.

I'll stop wasting my time trying to help the uneducated.

Over and out.

Maybe you should

Beamster wrote: Some fuel injected vehicles, like our LS1 Chevy, seem to adjust themselves without intervention.

I wasn't saying you didn't know what you were talking about, I was just pointing out that he wasn't wrong. Dickish as he may have been

toycoma98 · Post by **toycoma98** » Tue Jun 29, 2010 10:30 pm

Beamster wrote:
toycoma98 wrote: Duh, fuel injected engines are controlled by a computer (ECU).
Duh yourself.
Don't you think we know our vette has a computer?

Try to be helpful, not condescending.

My bad, i'm just being silly saying "duh"

This quote cought my eye thats why:

Beamster wrote:Some fuel injected vehicles, like our LS1 Chevy, seem to adjust themselves without intervention.

Cheshire · Post by **Cheshire** » Wed Jun 30, 2010 1:02 am

toycoma98 wrote:
Cheshire wrote:Prima pipe
modified airbox: airbox baffle and intake hose removed
Mixture screw opened 1 full turn.

Earlier, ScooterTrash said you get a little more power running lean. I'm waffling between a 105 and 110...the 105 pushes harder, but the pipe sounds kinda hollow with it. The 110 sounds full-bodied, healthier...if that makes sense. The 105 has the plug a medium grey where the 110 has it black, so....

Main jet: 110
Go in between like a 107-108

I have a 103 jet .

Scooterworks only carries them in increments of 5. Where'd you get a 103?

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 1:04 am

Cheshire wrote:
toycoma98 wrote:
Cheshire wrote:Prima pipe
modified airbox: airbox baffle and intake hose removed
Mixture screw opened 1 full turn.

Earlier, ScooterTrash said you get a little more power running lean. I'm waffling between a 105 and 110...the 105 pushes harder, but the pipe sounds kinda hollow with it. The 110 sounds full-bodied, healthier...if that makes sense. The 105 has the plug a medium grey where the 110 has it black, so....

Main jet: 110
Go in between like a 107-108

I have a 103 jet .
Scooterworks only carries them in increments of 5. Where'd you get a 103?

Kinda hard to find in the between ranges. I'll check my chart and see if I made any.

toycoma98 · Post by **toycoma98** » Wed Jun 30, 2010 1:19 am

Cheshire wrote:Scooterworks only carries them in increments of 5. Where'd you get a 103?

I went to a local scooter shop here on Guam and they had a sh*t load of jets....

The jet i got from them is stamped 103 on the side...and it fits my stock carb. It cost me about $10 though.

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 3:27 am

toycoma98 wrote:
Cheshire wrote:Scooterworks only carries them in increments of 5. Where'd you get a 103?
I went to a local scooter shop here on Guam and they had a sh*t load of jets....

The jet i got from them is stamped 103 on the side...and it fits my stock carb. It cost me about $10 though.

Ouch, overpriced much?

toycoma98 · Post by **toycoma98** » Wed Jun 30, 2010 3:29 am

$10 is a good deal....it beats shipping wait tiime.

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 3:34 am

toycoma98 wrote:$10 is a good deal....it beats shipping wait tiime.

Not when all mine were free

toycoma98 · Post by **toycoma98** » Wed Jun 30, 2010 3:37 am

ScooterTrash wrote:
toycoma98 wrote:$10 is a good deal....it beats shipping wait tiime.
Not when all mine were free

i spent 10 bucks one time vs. buying tiny drill bits and tools and extra jets

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 3:50 am

toycoma98 wrote:
ScooterTrash wrote:
toycoma98 wrote:$10 is a good deal....it beats shipping wait tiime.
Not when all mine were free
i spent 10 bucks one time vs. buying tiny drill bits and tools and extra jets

Already had the bits and my jets were free

toycoma98 · Post by **toycoma98** » Wed Jun 30, 2010 4:05 am

ScooterTrash wrote:
toycoma98 wrote:
ScooterTrash wrote: Not when all mine were free
i spent 10 bucks one time vs. buying tiny drill bits and tools and extra jets
Already had the bits and my jets were free

Cheshire · Post by **Cheshire** » Wed Jun 30, 2010 5:08 pm

ScooterTrash wrote:
toycoma98 wrote:
ScooterTrash wrote: Not when all mine were free
i spent 10 bucks one time vs. buying tiny drill bits and tools and extra jets
Already had the bits and my jets were free

Not everyone can be an employee at a scooter dealer, ScooterTrash.

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 6:47 pm

Cheshire wrote:
ScooterTrash wrote:
toycoma98 wrote: i spent 10 bucks one time vs. buying tiny drill bits and tools and extra jets
Already had the bits and my jets were free
Not everyone can be an employee at a scooter dealer, ScooterTrash.

Not an employee

shop is closed, I run my own show now

tetonmtnrider · Post by **tetonmtnrider** » Wed Jun 30, 2010 7:11 pm

ScooterTrash,

I see you are in Idaho Falls. I am over the hill in Jackson, WY at 6200ft. My wife has a 09 Pamplona. Do new scooters have jets installed that are appropriate for the elevation of the selling dealer, or just with factory (flatlander) jets?

If factory jetting is what customarily comes from any selling dealer, what size would you switch to for 6200ft?

Thanks,
Jeff

ScooterTrash · Post by **ScooterTrash** » Wed Jun 30, 2010 10:50 pm

tetonmtnrider wrote:ScooterTrash,

I see you are in Idaho Falls. I am over the hill in Jackson, WY at 6200ft. My wife has a 09 Pamplona. Do new scooters have jets installed that are appropriate for the elevation of the selling dealer, or just with factory (flatlander) jets?

If factory jetting is what customarily comes from any selling dealer, what size would you switch to for 6200ft?

Thanks,
Jeff

Did you buy it from us? I don't recall selling any Pamplona's so probably not

You will probably be running a little rich up in jackson but nothing to be concerned about. Jetting is the same on all new scoots unless the dealer changes it (not likely)