Are the jets in the 400ex carb the same as the 250x, not size? What are the stock size jets in the 250x? Im trying to figure this out to find a place to start jetting for the custom 400ex to 250x exhaust slip on.
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Senior Member
Are the jets in the 400ex carb the same as the 250x, not size? What are the stock size jets in the 250x? Im trying to figure this out to find a place to start jetting for the custom 400ex to 250x exhaust slip on.
2001 Yellow 400ex
WB R4 full system
Uni air filter
No airbox lid
160 MJ 42 PJ
Tusk handle bars
Tusk Nerfs
MSR Gripper Levers
Black Maier Handguards
Titax 14 tooth front sprocket
Kenda Klaw Rear 20in.
All Balls axle bearings
Front 21" Razr PR on flipped stockers
WB rev box
Custom black plastic a-arm guards
Powder Coated things
ALL IN PIECES 4 WINTER REBUILD!!!
Senior Member
i think the 250x stock main jet is a 122, and the 400 is a 148. They are the same style jets. jetting will take some experimenting...
'03 Yellow 400ex
'03 Red 400ex
'88 Trx 300 4x4
How's my typing? I'd like to know. Dail 1-800-KISS-MYAZ
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