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Showing OEM parts for your 1998 KTM 400 SX '98

MAIN JET 145 image 1
KTM

MAIN JET 145

57031523145

$9.12Backorder — Mid December 2026
Fits: 2023 450 XCF-W, 2023 500 EXC-F, 2023 500 EXC-F SIX DAYS, 2022 450 XC-F, 2022 500 EXC-F + 133 more
1

This part is on backorder. Expected availability: Mid December 2026. Your order will ship when the part arrives.

Genuine OEM Part — Manufacturer Warranty
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Appears in 90 assemblies

CARBURETOR
CARBURETOR
CLUTCH COVER
CLUTCH COVER
ENGINE CASE
ENGINE CASE
ENGINE CASE
ENGINE CASE
ENGINE CASE
ENGINE CASE

Fitment (138 models)

YearModel
2023450 XCF-W
2023500 EXC-F
2023500 EXC-F SIX DAYS
2022450 XC-F
2022500 EXC-F
MAIN JET 145$9.12