Specifications

Bore Size
85 mm

Mfg #:
BMP-P800DK-1

Part #:
133941

Type
Piston Kit

Units
Each

Weight
5.05 lbs

Resources & Manuals

Instruction Manual

751.7 KiB Bikeman Performance Durability Piston Kit – BMP-P800DK-1

Custom designed taller pistons have less piston slap
Rings have been spaced apart for better cooling
Pistons have .020″ wrist pin offset to take load off the intake side
Forged pistons are more durable and collapse less than factory pistons
Friction-resistant coated pistons
Lubrication holes in the skirt of the piston designed to lengthen piston skirt life
Gains 6-7 horsepower and even more for motors down on compression
A must-have for motors with over 1500 miles on stock pistons
Smoother running motor
No EFI controller required
Includes pistons, rings, circlips, wristpins, cylinder bolts, cylinder spacer, longer alignment pins and two base gaskets
NOTE: We recommend turning up your oil pump 1 turn on non HO(Axys) motors. On all models, we recommend pre-mixing your fuel at 100:1 in the tank when possible. This helps provide extra lubrication on the intake side of the piston. Since the injector sprays that side of the pistons, the fuel washes the oil off. For this reason, adding extra lubrication with the fuel will also help extend piston life.

Included Items:
(2) Pistons
(2) Wrist pins
(4) Circlips
(2) Top rings
(2) Secondary rings
(2) Base gaskets
(1) Cylinder spacer
(8) 10mm-1.50 x 110mm Flange hex head bolts
(8) 10mm Flat washers
(2) Dowel pins
Instructions