JSN1105 Big Bore 10mm Stroker Engine

JSN Engines are built to order.  There is a 90 day lead time for all JSN engine orders though delivery times are typically faster. 

the JSN1105 offers incredible performance for freestyle or freeride while still utilizing stock (heavily modified) cases.  Featuring the world famous CPI cylinder, the JSN1105 is the most powerful +10mm stroker engine in the industry.  We’ve taken the cylinder that changed the jet ski industry and paired it with an engine package thats reliable and easy to maintain.  This engine blows many of the competitors 1200s away.

We start with clean stock cases then sand blast and epoxy.  We then CNC port the cases so every build is exactly the same.  Trenching is also done on our in-house CNC equipment and custom blowout plates added to support the lower end trenched area.  Every engine comes fully assembled and pressure checked.  You’ll have access to a full build profile with every spec down to what type of case sealant and epoxy was used on our website.  Looking to buy a used JSN engine and not sure how it was originally built?  We’ve got you covered – you can simply enter the engine serial in our engine catalog and find every detail of how that engine was originally built.

Whats Included?

• Assembled Shortblock
  • Nikasil plated CPI cylinder with JSN porting – EVERY 1105 comes ported for max performance.  No “comp” or secret sauce porting here.
  • JSN epoxied, CNC ported, trenched and painted stock cases with blowout plate (clean used)
  • High strength custom alloy cylinder studs
  • Blueprinted +10mm 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

• $100 -Exhaust manifold port matching (customer ships exhaust manifold to JSN)
• $50 – Custom head shell engraving