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JE PISTONS - YAMAHA
Industry leader in forged racing pistons!

HONDA | KAWASAKI | SUZUKI | YAMAHA

1998-2003 YZF-R1/FZ1/RX1
2004-2006 R1
2007-2008 R1
2009 R1

2001-2005 YZF-R6
2006-2009 YZF-R6

1998-2003 YZF-R1/FZ1/RX1 Std Bore: 74mm Note: * Gasket does not fit RX1 Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Ring #	Gasket #

262326	998cc	74mm	STD	9.0:1	191	Round	XA7400	JC8562*	1

247958	998cc	74mm	STD	10.0:1	182	Round	XA7400	JC8562*	T,1

174998	998cc	74mm	STD	13.0:1	177	Round	OEM-not included in kit	JC8562*	M,1

222096	998cc	74mm	STD	13.0:1	163	FSR	XA7400	JC8562*	M,1

222095	1052cc	76mm	+2mm	13.0:1	171	FSR	XG7600	JC8563*	1

2004-2006 R1 Std Bore: 77mm Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Gasket #
222099	998cc	77mm	STD	13.5:1	183	FSR	JC8686

222098	1051cc	79mm	+2mm	13.5:1	191	FSR	JC8695

2007-2008 R1 Std Bore: 77mm Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Gasket #

262541	998cc	77mm	STD	13.8:1	196	FSR	email

2009 R1 Std Bore: 78mm Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Gasket #

290126	998cc	78mm	STD	13.5:1	201	FSR	email

2001-2005 YZF-R6 Std Bore: 65.5mm Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Gasket #

247959	618cc	66.5mm	+1mm	12.5:1	129	FSR	email

221324	637cc	67.5mm	+2mm	12.5:1	127	FSR	JC8575

2006-2009 YZF-R6 Std Bore: 67mm Please email Dynoman for price and availability
Piston Kit #	Disp.	Bore Size	Over Size	Comp Ratio	Gram Wt (g)	Skirt Style	Gasket #

262317	599cc	67mm	STD	13.1:1	130	FSR	email

262318	635cc	69mm	+2mm	13.1:1	142	FSR	email

Footnotes:

A	fits 3.480 and 3.500 stroke
B	Oil Rail Support is Included
C	.927 Pin Diameter
D	.912 Pin Diameter
E	.990 wrist pin
F	Indicates 1.040 Pin Diameter
H	Indicates 1.094 Pin Diameter
J	Indicates 3mm Oil Ring
K	.945 Pin Diameter
P	.975 Pin Diameter
S	Solid dome design
W	428 Crank Shaft
X	angle milled heads

L	Limited Availability
M	Made To Order
T	Accepts Turbo and Nitrous
Q	Mini Sprint
Y	Pro Mod
*	Head and Base only, top-end #JC7798
**	Must use JC0001 gasket
*******	Must Sleeve Bore and Machine Case
1	JE Gasket does not fit RX1
2	Fits +1mm Oversized Valves
3	Fits +1mm Oversized Int & +2mm Oversized exh valves
4	Fits +2mm Oversized Valves
5	Piston is .014" taller for tighter deck clearance
6	Must run base spacer plate #JC7121
7	Z400 Gaskets: 92mm - JC7978, 94mm - JC7979, 95mm - JC7777
8	No head modification required
9	Big Bore Kit
10	Big Bore Kit 4 5/8" stroke

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