SBT Piston & Ring Set for Sea-Doo 4-Tec Supercharged GTX 4 Tec SC/RXP SC 420890244

• This is a Forged SBT Piston, compatible for all supercharged applications including : 185hp, 215hp, 255hp and the 260 hp. 
• Our "standard" pistons are comparable to others premium pistons. 
• SBT is so confident in the quality of our pistons that all pistons come with a LIFETIME warranty against manufacturers defect!
• Fits:420890244
• The Sea-Doo 4-TEC Supercharged Piston Kit Includes:
• Piston
• Set of Steel Rings,
• Cir-Clips
• Piston Pin 

2007 150 Speedster 215 SCIC
2009 150 Speedster 215 SCIC
2009 150 Speedster 255 SCIC
2010 150 Speedster 255 SCIC
2011 150 Speedster 255 SCIC
2012 150 Speedster 260 SCIC
2007 180 Challenger 215 SCIC
2008 180 Challenger 215 SCIC
2011 180 Challenger 215 SCIC
2012 180 Challenger 215 SCIC
2007 180 Challenger SE 215 SCIC
2008 180 Challenger SE 215 SCIC
2009 180 Challenger SE 215 SCIC
2011 180 Challenger SE 215 SCIC
2012 180 Challenger SE 215 SCIC
2009 180 Challenger SE 255 SCIC
2010 180 Challenger SE 255 SCIC
2011 180 Challenger SE 255 SCIC
2012 180 Challenger SE 260 SCIC
2012 180 SP 260
2007 200 Speedster 215 SCIC
2010 200 Speedster 510 SCIC
2011 200 Speedster 510 SCIC
2012 200 Speedster 510 SCIC
2012 210 Challenger 260 SCIC
2011 210 Challenger SE 430 SCIC
2012 210 Challenger SE 430 SCIC
2012 210 SP with Tower 430 SCIC
2011 210 Wake 430 SCIC
2012 210 Wake with Tower 430 SCIC
2007 230 Challenger SE 215 SCIC
2009 230 Challenger SE 215 SCIC
2009 230 Challenger SE 255 SCIC
2008 230 Challenger SE 430 SCIC
2011 230 Challenger SE 430 SCIC
2012 230 Challenger SE 430 SCIC
2010 230 Challenger SE 510 SCIC
2011 230 Challenger SE 510 SCIC
2012 230 Challenger SE 520 SCIC
2009 230 Challenger SP 215 SCIC
2007 230 Challenger Wake 215 SCIC
2008 230 Challenger Wake 430 SCIC
2011 230 SP 430 SCIC
2012 230 SP with Tower 430 SCIC
2009 230 Wake 215 SCIC
2009 230 Wake 255 SCIC
2011 230 Wake 430 SCIC
2011 230 Wake 510 SCIC
2010 230 Wake SE 430 SCIC
2010 230 Wake SE 510 SCIC
2006 Challenger 180 4-TEC
2005 Challenger 180 4-TEC SCIC
2014 GTI 155 SE
2012 GTI Limited 155
2013 GTI Limited 155
2014 GTI Limited 155
2012 GTI SE 155
2013 GTI SE 155
2012 GTR 215
2013 GTR 215
2014 GTR 215 SCIC
2012 GTX 155
2013 GTX 155
2014 GTX 155
2008 GTX 215 SCIC
2009 GTX 215 SCIC
2012 GTX 215 SCIC
2013 GTX 215 SCIC
2006 GTX 4 TEC Limited
2003 GTX 4 TEC Limited SCIC
2004 GTX 4 TEC Limited SCIC
2005 GTX 4 TEC Limited SCIC
2003 GTX 4 TEC SCIC
2004 GTX 4 TEC SCIC
2005 GTX 4 TEC SCIC
2006 GTX 4 TEC SCIC
2010 GTX iS 215
2011 GTX iS 215
2007 GTX Limited
2014 GTX Limited 215 SCIC
2009 GTX Limited iS 255
2010 GTX Limited iS 260
2011 GTX Limited iS 260
2012 GTX Limited iS 260
2013 GTX Limited iS 260
2014 GTX Limited iS 260
2012 GTX S 155
2013 GTX S 155
2007 GTX Wake
2007 GTX Wake 215 SCIC
2008 GTX Wake 215 SCIC
2008 Islandia SE 430 SCIC
2005 RXP
2006 RXP
2008 RXP 155
2007 RXP 215 SCIC
2008 RXP 215 SCIC
2009 RXP 215 SCIC
2004 RXP SCIC
2010 RXP X 255
2011 RXP X 255
2009 RXP X 255 SCIC
2012 RXP X 260
2013 RXP X 260
2014 RXP X 260
2005 RXT
2006 RXT
2007 RXT 215 SCIC
2008 RXT 215 SCIC
2010 RXT 215 SCIC
2011 RXT 260
2012 RXT 260
2013 RXT 260
2014 RXT 260
2011 RXT aS X
2009 RXT iS 255
2010 RXT iS 260
2011 RXT iS 260
2012 RXT iS 260
2009 RXT X 255
2011 RXT X 260
2012 RXT X 260
2013 RXT X 260
2014 RXT X 260
2006 Speedster 200 4 Tec SCIC
2005 Speedster 200 Twin 4 Tec SCIC
2007 Speedster Wake 215 SCIC
2008 Speedster Wake 310
2008 Speedster Wake 430 SCIC
2006 Sportster 4 Tec
2005 Sportster 4 Tec SCIC
2006 Sportster 4 Tec SCIC
2012 Wake 155
2013 Wake 155
2014 Wake 155
2009 Wake Pro 215
2010 Wake Pro 215
2011 Wake Pro 215
2012 Wake Pro 215
2013 Wake Pro 215
2014 Wake Pro 215

Piston to Cylinder Clearance:
The piston size plus the clearance equals the final bore size. For the recommended clearances by make and model, see Table 1. The cylinder first should be bored to within 0.002” of the final bore size. The remaining 0.002” should be removed with a 400 grit cylinder hone. The honing process should be controlled such as to leave a 45 degree crosshatch pattern on the cylinder wall.

Port Chamfering:
Once the cylinder is honed to the final size, all of the ports in the cylinder wall should be chamfered with a file or chamfer tool. The chamfered edge should be cut at approximately a 30 degree angle around the entire port. The cylinder should then be honed with a 400 grit flex hone to apply a uniform finish and to re-establish the 45 degree cross-hatch pattern.

Cylinder Cleaning Process:
Clean cylinders in warm soapy water using a firm plastic brush (such as a tooth brush), then dry, and immediately lubricate with 2-stroke oil. Honing grit tends to reside in the crosshatch and must be scrubbed out. An extremely clean cylinder free of grit is critical in order to avoid “drag marks” and other damage to the cylinder wall after assembly.

Setting the Ring Cap:
Place the piston ring in the cylinder. Use the piston to push the ring approximately 5mm from the top of the cylinder in order to square the ring in the cylinder. Use a feeler gauge to measure the gap between the ends of the ring. If the gap is too small, one end of the ring must be filed. Re-install the ring and measure again to confirm the final dimension. Recommended ring gap clearances are shown in Table 2.


Piston Installation:
Install the base gasket (we recommend Threebond 1211 as a gasket treatment). Lubricate the wrist pin bearing with 2-stroke oil and install the piston on the connecting rod. The designation mark on the piston crown points in the direction as shown in Table 3. Install the c-clips with the open end in either the 6 or 12 o’clock position. Install the rings onto the piston. Using your hands or a ring compressor, collapse the rings into the ring grooves and install the cylinder. Torque cylinder to proper torque specifications.

Table 1: Piston to Cylinder Clearance
Clearance	Application
2 Stroke
.004”-.005”	Kawasaki 440, 550, 650, 750, 900, 1100 Yamaha 500, 650, 701, 760, 1100, 1200
.0045”-.0055”	Yamaha 800, 1200pv, 1300
.005”-.006”	Seadoo 580, 650, 720, 800 Polaris 650, 750, 780, 900 Kawasaki 1200
.007”-.008”	Polaris 700, 1050 Seadoo 951, 800 RFI
4 Strokes
.001”-.0022”	Seadoo 112 (N/A)
.002”-.004”	Seadoo 113 (S/C)
.002”-.003”	Yamaha 408, 410, 411
.0015”-.0025”	Kawasaki 213, 214
.0005”-.0015”	Honda 600, 601

Table 2: Ring End Gap
Clearance/Tolerance	Application
2 Strokes
.011” +/- .003”	Kawasaki 1100
.012” +/- .002”	Seadoo 800
.012”+/- .004”	Kawasaki 440, 550, 650 Yamaha 500, 650, 701, 760, 1100, 1200, 800,1200pv Tigershark 640, 770, 1000
.013” +/- .003”	Seadoo 580, 650, 720 Kawasaki 750, 900, 1200
.013” +/- .005”	Polaris 650, 700, 750, 780
.014” +/- .004”	Polaris 900, 1050
.019” +/- .001”	Tigershark 900
.022” +/- .003”	Seadoo 951/DI
4 Strokes
.015”-.021”	Yamaha FX Top Ring
.019”-.027”	Yamaha FX Middle Ring
.011”-.023”	Yamaha FX Oil Ring
.013”-.017”	Yamaha VX/FXHO Top Ring
.017”-.023”	Yamaha VX/FXHO Middle Ring
.004”-.014”	Yamaha VX/FXHO Oil Ring
.006”-.014”	Seadoo Top Ring/Middle Ring
.006”-.012”	Seadoo Oil Ring
.010”-.016”	Kawasaki Top Ring
.016”-.022”	Kawasaki Middle Ring
.016”-.023”	Kawasaki Oil Ring
.007”-.013”	Honda Top Ring
.016”-.022”	Honda Middle Ring
.010”-.030”	Honda Oil Ring

Table 3: Piston Arrow Direction
Make	Engine	Marking	Position
Seadoo	All	Arrow	Towards exhaust
Kawasaki	All (except 4-stroke)	Arrow	Towards Exhaust
Kawasaki	4-strokes	Dot	Towards exhaust
Polaris	650, 750, 780	Arrow	Towards front
Polaris	700, 900, 1050	Arrow	Towards exhaust
Yamaha	500	“UP”	Towards front
Yamaha	All others	Arrow	Towards exhaust
Tigershark	640, 1000	Arrow	Towards exhaust
Tigershark	770, 900	Dot	Towards exhaust
Honda	4-strokes	In	On the intake side