2026 KPMI Full Catalog V1 - Flipbook - Page 309
YAMAHA XS 650 1970-1983
®
™
YAMAHA
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure
Open Pressure
@ Lift
100#
228#
.515"
Intake
80-80340
.515”
1.450"
Exhaust
Kit Includes
4
H. T. Steel Retainers
4
H. T. Steel Keeper Pr.
4
CrSi Valve Springs
4
H. T. Steel Basewashers
Must use Kibblewhite® Guides with high lift cams. This kit is supplied with radiused bead keepers and must be used with radius groove valves
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
1.620"
0.3145"
25º
4.105"
Standard
1.384"
0.3140"
29º
4.030"
Standard
KPMI P/N
Type
Head Diameter
80-80380
Intake
41.15mm
80-80383
Exhaust
35.15mm
These valves utilize a radiused keeper groove. To install in models prior to 1973, use with radius beaded keepers #51012-4
Valve Guides • C630 Bronze
A
B
C
D
E
0.430"
0.550"
0.840”
1.290"
0.905"
0.430"
0.550"
1.150"
1.550"
0.905"
F
G
Intake
0.3140" 0.5930" / Std.
Exhaust
80-80370
+0.001”
80-80371
+0.002”
80-80372
+0.010”
80-80379
80-80360
0.3140" 0.5930" / Std.
Use O.E.M. valve guide seal
+0.001”
80-80361
+0.002”
80-80362
+0.010”
80-80369
YAMAHA VARIOUS 660'S 2001-2008
®
•
GRIZZLY™ 2002-2008
RAPTOR™ 2001-2005
•
•
RHINO™ 2004-2007
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure
Open Pressure
@ Lift
55#
145#
.345"
Intake
80-80030
.450”
1.205"
Exhaust
Kit Includes
5
Titanium Retainers
5
CrSi Valve Springs
3
In H. T. Steel Basewashers
2
Ex H. T. Steel Basewashers
KPMI P/N
80-82390
Type
Max Valve Lift Installed Height Seat Pressure
Intake
.450”
Exhaust
Kit Includes
5
3
3
3
1
1.205”
55#
Open Pressure
@ Lift
145#
.345”
In / Ex Titanium Retainers
5
In / Ex CrSi Valve Springs
In H. T. Steel Basewashers
2
Ex H. T. Steel Basewashers
In Std. Black Diamond™ Valves 2
Ex Std. Black Diamond™ Valves
In Std. C630 Valves Guides
2
Ex Std. C630 Valve Guides
Top End Gasket Kit
291
Cylinder Head Service Kit
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