JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0)
JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0)
JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0) JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0)

JOG 90 Long Stroke Bakelite Crankshaft 45mm(+3.0)

Faster primary compression. Longer-stroke torque. OEM-fit build.

This Bakelite Long-Stroke Crankshaft for Yamaha JOG 90 combines Bakelite (phenolic) case-stuffing inserts with a 45.0 mm (+3.0) stroke. The inserts trim crankcase dead volume to sharpen primary compression, while the added stroke raises displacement potential for stronger low-to-mid pull—once cylinder height, timing, and fueling are set correctly. Precision journals and OEM-matched tapers keep assembly straight and predictable.

Highlights

  • +3.0 mm Long Stroke — 45.0 mm stroke broadens torque potential after proper top-end setup.

  • Primary-Compression Boost — Bakelite stuffers reduce case volume for quicker pressure rise off the line.

  • Cleaner Case Flow — Web shaping helps direct mixture efficiently toward the transfers.

  • Precision Interfaces — Tapers/threads/keyway match OEM bearings and ignition hardware.

  • Build-Ready — Designed for straightforward truing, seal fit, and clearance checks.

Product Specifications
✔ Type: Bakelite-stuffed long-stroke crankshaft
✔ Stroke: 45.0 mm (+3.0)
✔ Fitment: Yamaha JOG 90 (confirm year/engine code)
✔ Interfaces: OEM-match main-shaft tapers, threads & keyway
✔ Bearings/Seals: Compatible with OEM-spec main bearings & oil seals
✔ Material: Forged steel webs & connecting rod, Bakelite inserts
✔ Package Includes: Crankshaft assembly ×1

Installation Notes

  • Set cylinder height/base spacer, compression ratio, and squish clearance for the +3.0 stroke.

  • Re-map port timing / ignition advance / fueling to suit the longer stroke and higher case pressure.

  • Confirm small-end pin diameter and bearing spec match your piston/rod kit.

  • Check crankcase/web clearances, measure runout after bearing install, use new seals, and complete careful break-in.

Power You Can Trust.