[greendub]

anyone try a larger pilot for the old style carb? I am running 1 125 main with lots of other mods. Also looking for a part number on a 42 pilot

 

[lizrdbrth]

Since you're using a 125 I'm assuming an early-style carb.



XT350's use a 125 main and #42 pilot in their main (primary) carb. Same basic carb.



The jets used in the secondary carb won't swap.

 

[PJungnitsch]

I run the bigger pilot. Seems to work about the same at 2 turns out as the stock one did at 4.



Got the part # from here:



http://www.advrider.com/forums/showpost.php?p=7907558&postcount=149

 

[lizrdbrth]

Handy list. We need to swipe dat.

 

[PJungnitsch]

Here we go, swiped from a post on Advrider, who swiped it from a post on ThumperTalk:



Jet sizes and part numbers that fit the XT 350 carb:



PRIMARY MAIN JETS

288-14343-35-00 = 70

288-14343-39-00 = 78

288-14343-40-00 = 80

288-14343-41-00 = 82

288-14343-42-00 = 84

288-14343-43-00 = 86

288-14343-44-00 = 88

288-14343-45-00 = 90

288-14343-46-00 = 92

288-14343-47-00 = 94

288-14343-48-00 = 96

288-14343-49-00 = 98

288-14343-50-00 = 100

288-14343-51-00 = 102

288-14343-52-00 = 104

288-14343-53-00 = 106

288-14343-54-00 = 108

288-14343-55-00 = 110

288-14343-56-00 = 112

288-14343-57-00 = 114

288-14343-58-00 = 116

288-14343-59-00 = 118

288-14343-60-00 = 120 (XT 600 OPTION)

288-14355-61-00 = 122

288-14355-62-00 = 124 [AKA 288-14343-62-00]

288-14343-63-00 = 125 (XT 350 STOCK)

288-14355-64-00 = 128 [AKA 288-14343-64-00] (TW200 01-07 OPTION)

288-14343-65-00 = 130 (XT 600 STOCK)

288-14355-66-00 = 132.5 [AKA 288-14343-66-00]

288-14355-67-00 = 134 [AKA 288-14343-67-00]

288-14343-68-00 = 135

288-14343-70-00 = 140 (XT 600 OPTION)

288-14343-73-00 = 146

288-14329-74-00 = 148 [AKA 288-14343-74-00]

288-14329-75-00 = 150 [AKA 288-14343-75-00]

288-14343-76-00 = 152

288-14329-78-00 = 156 [AKA 288-14343-78-00]

288-14343-80-00 = 160

288-14329-81-00 = 162

288-14329-82-00 = 164

288-14329-83-00 = 166

288-14329-84-00 = 168

288-14329-86-00 = 172

288-14329-87-00 = 174

288-14329-88-00 = 176



SECONDARY MAIN JETS

30X-14343-40-00 = 80

30X-14343-50-00 = 100

30X-14343-51-00 = 102

30X-14343-52-00 = 104 (XT 600 STOCK SEC MAIN)

30X-14343-53-00 = 106 (XT 350 STOCK SEC MAIN)

30X-14343-55-00 = 110 not sure if available

30X-14343-60-00 = 120

30X-14343-63-00 = 125



PILOT JETS

30X-14342-19-00 = 38

30X-14342-20-00 = 40

30X-14342-21-00 = 42 (XT 350 STOCK)



#48 pilot 43f-14342-24.

#140 main 288-14343-70

 

[lizrdbrth]

You may want to "un-swipe" all of the "30X-" Main jets. They're for the secondary carb on an XT and won't interchange.



The 4-valve XT's (350's, 550's, 600's) Use two carbs. The main carb is a Tekei slide carb pretty much like ours, but the secondary carb is a CV type and has no pilot circuit, floats or float bowl and uses different style mains. It's its own critter.



Most of them probably aren't available any more but it could confuzzle folks.



The pilot jet numbers should be valid.

 

[Stromper]

Changing the pilot up 1 size per the thread here made a great difference to my last 2 bikes

 

[greendub]

Thanks Guys! found one last night got er orderded. Yeah old style carb

 

[PJungnitsch]

You may want to "un-swipe" all of the "30X-" Main jets. They're for the secondary carb on an XT and won't interchange.



The 4-valve XT's (350's, 550's, 600's) Use two carbs. The main carb is a Tekei slide carb pretty much like ours, but the secondary carb is a CV type and has no pilot circuit, floats or float bowl and uses different style mains. It's its own critter.



Most of them probably aren't available any more but it could confuzzle folks.



The pilot jet numbers should be valid.

Good info.



In case this comes up in a search, some pics of the pilot location and the bigger pilot itself:

 

[craig0ry]

I'd like to resurrect this old thread (as I am fond of doing) to ask if anyone really noticed a difference in the power band after swapping pilot jets. Wouldn't turning the stock #40 out a few more turns be equivalent to going up a size? It doesn't matter in any case as I've ordered the pilot jets, but I'm just curious.