2026 KPMI Full Catalog V1 - Flipbook - Page 142
HONDA CRF 450R 2002-2008
®
™
HONDA
Tappets • O.E.M Replacement • H.T. Steel
KPMI P/N
Type
Coating
A
B
30-30648
Intake H. T. Steel 26.00mm 1.0232” 0.970”
C
E
F
Quantity
0.790”
0.255”
0.115”
Pkg. of 2
Refer to KPMI® Tappet Section, in back of catalog, when selecting oversize tappets.
Keeper Set • O.E.M. Replacement
“B”
KPMI P/N
Style
30-30650
Single
Radius Bead
“D”
“C”
A
E
Type
A
B
C
D
E
Quantity
Intake
0.215"
7.0°
0.179"
0.214”
0.262”
2 Pr.
Exhaust
0.196"
7.0°
0.170"
0.205”
0.236”
2 Pr.
Note : The bead height is referenced from the minor diameter of the keeper to the center of the bead.
Cylinder Head Stud Kit
KPMI P/N
O. L. "C"
Body Dia.
A
B
Remarks
30-33850
7.25"
0.439”
1.00”
1.00”
12mm Oversize Diameters
Includes
4
H.T. Steel Studs
4
H.T. Steel Nuts
4
H.T. Steel Washers
KPMI® Cylinder Studs are made from 180,000 psi yield strength, 昀椀ne grain, heat treated, aircraft grade alloy steel. When you want a stud that meets proof-stress and
maximizes clamping force, look no further. KPMI® “rolls” the threads, heat treats and then centerless grinds the entire body of the stud. Rolling the threads creates the
toughest and strongest thread possible and centerless grinding removes notch sensitivity. The 昀椀nal process for all KPMI® Studs is to encase the entire stud with premium
corrosion resistant treatment of Black Oxide. Congratulations on your choice to purchase a stud that meets and exceeds your stock-replacement of high-performance
needs! IMPORTANT NOTE / CYLINDER HEAD MODIFICATION REQUIRED: The OEM cylinder studs have a reduced diameter body and upper thread. This thin section
stud can be inadequate when pushed to the limit in maximum performance applications. These KPMI® Black Diamond™ studs feature a 12mm diameter for the entire stud,
providing maximum clamping force for extreme duty and peace of mind. A simple drilling operation with a 1/2” drill bit is required to modify the cylinder head.
Cylinder Head Stud Kit • No Head Mods Necessary
O. L. "C"
KPMI P/N
30-33950
Includes
Body Dia.
6.90"
4
0.358”
H.T. Steel Studs
A
1.00”
4
B
Remarks
1.00”
Std. OEM 12mm &
10mm Diameters
(No Cylinder Head
Modi昀椀cation is required)
H.T. Steel Nuts
4
H.T. Steel Washers
KPMI® Cylinder Studs are made from 180,000 psi yield strength, 昀椀ne grain, heat treated, aircraft grade alloy steel. When you want a stud that meets proof-stress and
maximizes clamping force, look no further. KPMI® “rolls” the threads, heat treats and then centerless grinds the entire body of the stud. Rolling the threads creates the
toughest and strongest thread possible and centerless grinding removes notch sensitivity. The 昀椀nal process for all KPMI® Studs is to encase the entire stud with premium
corrosion resistant treatment of Black Oxide. Congratulations on your choice to purchase a stud that meets and exceeds your stock-replacement of high-performance
needs!
Cylinder Head Nuts
KPMI P/N
Hex Pattern
Material
O. L.
F. D.
Thread
Quantity
41009-4
12mm
H. T. Steel
0.505”
0.750
M12 x 1.25
Pkg. of 4
41010-4
12mm
H. T. Steel
0.400”
0.700”
M10 x 1.25
Pkg. of 4
Replacement nuts for Stud Kits, #30-33850 & 30-33950, but can be used for general purpose (see diagram for detail)
124
These nuts are manufactured from a high strength premium steel that promotes excellent surface 昀椀nish and tight tolerances, two critical factors for achieving
correct 昀椀t and torque. After machining, the nuts are heat treated to a speci昀椀c depth. This creates hard, wear resistant working surfaces, while retaining a ductile
core to prevent cracking under load. The premium black oxide treatment gives an excellent, corrosion resistant appearance.
order 650-557-2046
