Yamaha ATV Stroker Crankshaft

PART 4073 INFO:

• Bolt in and go!
• Does not fit fuel injected R or X models
• Heavy Duty (04-05) (+14mm stroke) makes engine true 450cc
• Heavy Duty (06-08) standard stroke
• Uses stock piston
• When using Cylinder Works #21001-K01 makes engine 478cc
• Connecting Rod Side Clearance: 0.2-0.55mm
• Engine Type: 4-Cycle
• Final Displacement: 450cc
• Heavy Duty: TRUE
• Increased Engine Stroke: 1.400mm
• Stroke: 63.400mm
• Type: Stroker

PART 4111 INFO:

• +4mm stroker crankshaft with +5mm longer rods; Produces up to 403cc. Requires Vertex Long Rod pistons and G093 gasket kit when using OEM cylinder heads.
• All new assembly sold complete with Hot Rods connecting rod
• Factory assembled and trued to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance
• Ready for installation
• Crankshaft is completely rebuildable with genuine Hot Rods connecting rods
• Stroker crankshaft assembly add 1.5mm to 5mm of stroke depending on application; in some cases cylinder head must be modified or special pistons used (as noted)
• Main bearings not included
• +5mm longer rods
• Requires special Vertex long rod pistons and G093 gasket kit when using OEM cylinder heads.

PART 4105 INFO:

 

(+4mm stroke) produces 209cc with standard piston

Important: Head Chamber area must be machined 2mm deeper and the engine cases will need to be bored out to accept the longer stroke crank

Connecting Rod Side Clearance: 0.4-0.85mm

Engine Type: 2-Cycle

Final Displacement: 209cc

Increased Engine Stroke: 4mm

Stroke: 61mm

Type: Stroker