Duncan Racing's Complete Engine Performance Package for the Yamaha Warrior

UNFORTUNATLEY THIS KIT IS NO LONGER AVAILABLE IN COMPLETE FORM.
Carburetor and Exhaust have been discontinued.

DR HP4 Head builds are still available * see HP4 Valva Train Section.
Various Pistons options are also available.

Call DR for additional information #619.258.6306

Includes:
Fat Boy 4 Complete Stainless Exhaust, Camshaft, HD Valve Springs w/chromoly retainers, 38mm PE Carburetor Kit (thumb or twist), Jet Kit, Piston Kit, DRI Porting & Valve Job, Pro Flow Air Cleaner Flange, K&N Filter, Outerwear

*Price plus any necessary machining and or parts. Example: Boring, Gaskets, Guide Seals, etc. a re additional cost.

Cores Required:
Cylinder, Head with rocker arms, camshaft

Power Gain: 30-40%