Can you tell me which jets to buy and where?

jbswear · Post by **jbswear** » Tue Feb 24, 2009 9:11 pm

I put pod filters on my GT380 and need to bump up the jets. I don't know what size to go to or where I should buy them.

Can anybody here direct me?

Coyote · Post by **Coyote** » Wed Feb 25, 2009 9:21 am

Jets are available from www.sudco.com. Please note that the minimum quantity of any size jet is 4, so you will end up with a spare(s). Last time I bought from them, they were $14 + shipping for a set of 4.
There is a general rule of 1 jet size per mod. The problem is, Suzuki used a one step leaner on the center cylinder. Disassemble your carbs and note the jet sizes (stamped on). As I am not familiar wih the 380, I'm not sure what they are. If the outer 2 carbs are one step richer (i.e. 92.5 inner and 95 outer) you can reuse one of the outer mains on your center carb. Then you would order 97.5's for use in the outer carbs.
Before blowing money on jets, sometimes just raising the needles in the slides a couple of notches will rich-en it up enough. A WOT plug chop is the only way to tell for sure.

jbswear · Post by **jbswear** » Wed Feb 25, 2009 10:10 am

Coyote wrote:Jets are available from www.sudco.com. Please note that the minimum quantity of any size jet is 4, so you will end up with a spare(s). Last time I bought from them, they were $14 + shipping for a set of 4.
There is a general rule of 1 jet size per mod. The problem is, Suzuki used a one step leaner on the center cylinder. Disassemble your carbs and note the jet sizes (stamped on). As I am not familiar wih the 380, I'm not sure what they are. If the outer 2 carbs are one step richer (i.e. 92.5 inner and 95 outer) you can reuse one of the outer mains on your center carb. Then you would order 97.5's for use in the outer carbs.
Before blowing money on jets, sometimes just raising the needles in the slides a couple of notches will rich-en it up enough. A WOT plug chop is the only way to tell for sure.

Cool. Thanks. I'm hoping to ride it for the first time this weekend.

Once I get it licensed/inspected/tagged, I'll order the jets and go from there.

tz375 · Post by **tz375** » Wed Feb 25, 2009 12:31 pm

Word to the wise.

Lifting the needles MAY be enough but typically pods and pipes make it leaner at high revs than at mid revs (both at WOT). Larger mains change WOT fueling from low to high RPMs but not proportionately.

I don't have a 380 so I don't have model specific knowledge, but I'd get both one size up and 2 sizes up. I'd start 2 sizes up on the mains because they are so much cheaper than pistons.

Just take it easy and check the plugs

H2RICK · Post by **H2RICK** » Wed Feb 25, 2009 12:45 pm

The 380 used the same size jet in ALL three carbs. The stock jet was usually a #80 depending on market area. Soooo......since the 380 uses the the round slotted style jet (in Mikuni-speak it's a "reverse" style type N100/604) it's available in "half-sizes" e.g. 82.5.
Thus you can order 82.5, 85, 87.5, 90, 92.5, etc etc.
If you have a local Suzi dealer where the parts guys don't have their collective heads shoved up their collective wazoos, the Suzuki part numbers are:

82.5 = 09491-82002
85 = 09491-85004
87.5 = 09491-87001
90 = 09491-90003
92.5 = 09491-92001

Usually if you can give them a part number they won't give you attitude about old bikes.....because they have NO idea what the part fits and could care less. You can usually buy jets from suzuki as single items rather than in packs.

jbswear · Post by **jbswear** » Wed Feb 25, 2009 12:59 pm

Thanks, guys!

I do remember from tearing them down that all three mains were stamped with an "80"

I'll contact the shop and order 2 up and 1 up.

Tom W. · Post by **Tom W.** » Mon Mar 30, 2009 9:38 pm

Do you have a Cycle Gear near you? The one near me has a good selection in stock.

h2okettle · Post by **h2okettle** » Tue Mar 31, 2009 4:24 pm

I have a new set of 85 jets, that I had for my 380 but never opened the package.... I can send them to you if you like..

Allen.... GT rideaholic

PS... Anyone have a set of 115 mains for a GT750 ??