
TwinPower · New
Twin Power Big Twin and XL with CV Carburetor Idle Mixture Needle Repack Kit
MPN 420819 · Store SKU twp420819
Supplier stock checked 11/7/2026, 4:21:25 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Prevent idle mixture screw leaks with this Twin Power™ repacking kit. The Twin Power™ Fuel Mixture Repacking Kit allows you to maintain your carburetor for peak performance. This kit includes spring, O-ring and washer and fits all Keihin FCR MX carbs CV Carburetor Idle Mixture Needle Repack Kit
Manufacturer fitment & guides
Check 420819 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.