Namura .020 Over Bore Top End Kit for Sea-Doo 1500 4TEC non-SC 2002-2019 100.5mm
Namura .020 Over Bore Top End Kit for Sea-Doo 1500 4TEC non-SC 2002-2019 100.5mm
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Top End Kit for Sea-Doo 1500 4TEC non-SC .020 Over Bore 100.5mm
This top end kit provides a .020 over bore piston and ring set for Sea-Doo 1500 4TEC non-supercharged engines from 2002 through 2019, restoring compression and performance when the cylinder is reconditioned to 100.5mm. The kit includes a piston, rings, wrist pin, and circlips for a complete top-end rebuild on select Sea-Doo 1500 4TEC models.
Overview
Designed as a direct replacement top end kit for Sea-Doo 1500 4TEC non-supercharged engines, this .020 over bore set uses a 100.5mm piston to accommodate a light cylinder overbore. It is ideal for rebuilding worn or damaged top ends on Sea-Doo watercraft from 2002 to 2019, restoring reliable power and sealing.
Built For Performance
- Forged piston construction for high-strength and durability
- Precision-machined wrist pin and circlips for secure assembly
- Compatible with non-supercharged 4TEC engines only
- Includes complete ring set for proper compression and oil control
- Engineered to match OEM clearances when used with a properly bored cylinder
Fits These Machines
- for Sea-Doo GTX 155 (2002-2005)
- for Sea-Doo GTX 215 (2006-2009)
- for Sea-Doo RXP 155 (2003-2005)
- for Sea-Doo RXP 215 (2006-2009)
- for Sea-Doo RXT 155 (2003-2005)
- for Sea-Doo RXT 215 (2006-2009)
On-The-Job Use
- Replacing a worn top end on a high-hour Sea-Doo 4TEC engine
- Rebuilding an engine after a piston seizure or scoring
- Restoring compression for stronger acceleration and top speed
- Performing a mid-life engine refresh for personal watercraft
Specs At A Glance
| Piston Size | .020 Over Bore (100.5mm) |
| Application | Sea-Doo 1500 4TEC non-SC (2002-2019) |
| Components Included | Piston, Rings, Wrist Pin, Circlips |
Good To Know
Q: Do I need to recondition my cylinder before using this kit? A: Yes, this .020 over bore piston requires the cylinder to be bored to 100.5mm and honed to proper clearance; a standard bore cylinder cannot accept this piston.
Q: Can I use this kit on a supercharged Sea-Doo 4TEC? A: No, this top end kit is specifically designed for non-supercharged (non-SC) engines only; using it on a supercharged model will result in incorrect compression and potential engine damage.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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