JSN 900cc competition short block engine (Black anodized head shell and power valves)
900cc is a +4mm Yamaha stroker
This short block engine includes:
- Assembled Shortblock
- Nikasil plated CPI cylinder with JSN porting – comes ported for max performance.
- JSN epoxied, CNC ported, trenched and painted new cases
- High strength custom alloy cylinder studs
- +4mm CWI billet stroker crankshaft
-
Wiseco Pistons
- JSN engineered head shell and domes
- JSN power valves,
- JSN black anodized PV guides
- JSN black anodized PV caps (raw finish shown in picture)
- PV boots and retainers
Optional Services
- $130 – Exhaust manifold bore & port matching (buy new or customer can ship exhaust manifold to HSI)
- $175 – Intake manifold and speed plate bore & port matching for carbs over 48mm (buy new or customer can ship exhaust manifold to HSI)
This engine will come fully assembled. For additional pricing we can port match the intake manifold + speed plate to your carbs if they are larger than 48mm, and can port match your exhaust manifold. The little things add up to make a large difference! PLEASE ADD ON HERE IF YOU WANT THIS SERVICE.
* This short block engine does NOT include a flywheel cover, bed plates, or manifolds
* This is not a stocked item (ETA 90 days - but often arrives sooner)
Part Number(s): 83-JSN-900
00
