2026 KPMI Full Catalog V1 - Flipbook - Page 219
NORTON 850 1973-1977
®
Type
Max Valve Lift * Installed Height Seat Pressure Open Pressure
@ Lift
Intake
.500”
1.420"
105#
185#
.320"
50-0460
Exhaust
4
7075-T6 H. A. Retainers
4
H. T. Steel Keepers Pr.
Kit Includes
4
CrSi Valve Springs
4
H. T. Steel Basewashers
KPMI P/N
nORTOn
Valve Spring Kit • Lightweight Racing
*Important: In order to achieve the above installation height, it will be necessary to spot face the spring pad prior to guide installation.
Valve Spring Kit • O. E. M. Replacement
KPMI P/N
50-50000
Type
Kit Includes
Intake
H. T. Steel Retainers
Exhaust
4
CrSi Valve Springs
50-50001
H. T. Steel Basewashers
50-50004
4
4
50-50003
Max Valve Lift
Installed Height
Seat Pressure
Open Pressure
@ Lift
.410”
1.280"
93#
170#
.320"
All components are the quality you can expect from Kibblewhite®, manufactured to exact O.E.M. dimensions. These O.E.M. replacements parts may be
purchased separately using the above part numbers.
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
1.500”
0.3115”
1.5” R
4.065"
Standard
1.300"
0.3110”
27º
4.015"
Standard
KPMI P/N
Type
Head Diameter
50-4092
Intake
38.10mm
50-4091
Exhaust
33.02mm
Valve Guides • C674 Bronze
A
0.330"
B
0.400"
C
1.030”
D
1.560"
E
0.680"
F
0.3105'
G
0.6260" / Std.
+0.002”
+0.004”
+0.006”
0.525"
0.580"
0.955'
1.420"
0.680"
0.3105'
0.6260" / Std.
50-0652
+0.002”
50-0653
+0.004”
50-0654
+0.006”
50-0655
Note: Exhaust seals are not required.
Intake
Exhaust
50-0648
50-0649
50-0650
50-0651
Push Rod • Chrome Moly Tube • H. T. Steel Endpieces
KPMI P/N
Type
Material
“A”
“B”
Quantity
Intake
• Thin Wall Chrome Moly
Tube
• H. T. Steel Tips
8.150"
8.010"
Pkg. of 2
7.300"
7.160"
Pkg. of 2
50-50010
Exhaust
Stem Diameter
5/16"
O.L
0.465"
Seal O.D.
0.550"
Seal Style
1
A
0500”±0.010”
Part Number
71012-4
71012-8
71012-16
71012-50
71012-100
Designed for these guide specs
B
C
D
0.445”
0.230”
0.280”
Quantity
Pkg. of 4
Pkg. of 8
Pkg. of 16
Pkg. of 50
Pkg. of 100
Type
Intake
Exhaust
Quantity Discount
0%
0%
Less- 10%
Less- 15%
Less- 20%
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201
Valve Guide Seals • Viton®
