Note: This is a specialty product and is not currently available for purchase online. Please call Duncan Racing International and a DRI staff member will assist you by collecting the required specifications and placing your order. Thank you.

All DRI Camshafts are made in the USA to ensure the best quality. Camshafts are available in different power curve options to fit your riding and racing needs. CAM TYPE: Steel Billet made in USA.

CORE REQUIRED: No core required.

GRIND OPTIONS

X11 Grind Camshaft
Part #: 108-X11
Specifications: Midrange/Top End Cam, Lift: .430"/.385", Duration 266°/282°
Application: Motocross/Sand Dune Riding
Notes: 1, 2, 3

X22 Grind Camshaft
Part #: 108-X22
Specifications: Bottom/Midrange Cam, Lift: .412/.350", Duration 260°/268°
Application: Baja/Cross Country
Notes: 1

X33 Grind Camshaft
Part #: 108-X33
Specifications: Maximum Top End Cam, Lift .435/.385" Duration 276°
Application: TT/Drag Race Cam
Notes: 1, 2, 3


IMPORTANT NOTES

1.HD Valve Springs are required for this camshaft.
2.Shortened Bronze Guides are required for this camshaft.
3.New or modified piston required for this camshaft. Additional valve pocket relief in piston is required due to increased camshaft lift.
4.'08 -’14 TRX450 electric start model uses different mechanism.
Use part #140-grind #. All grinds are available in #140 -X11, X22, X33

CAM SPROCKETS: These cams use stock OEM cam sprockets or aftermarket slotted/adjustable cam sprockets.

COMPRESSION RELEASE: These camshafts use the stock OEM compression release mechanism installed and set as per the OEM Honda service manual.

CAMSHAFT ACCESSORIES

#VS-281H Heavy Duty Valve Springs w/Titanium Retainers $249.00

#VG-3730 Shortened Bronze Guides Intake 29.95ea

#VG-3740 Shortened Bronze Guides Exhaust 29.95ea


CAMSHAFT NOTES

All camshafts will offer their maximum performance when used with a professionally ported cylinder head and professionally cut valve seats.

IMPORTANT NOTE When installing a high performance camshaft it is the responsibility of the engine assembler to check and confirm that the piston to valve clearance is adequate. Minimum clearance is .060" from valve to piston at peak lift. Tolerances can and will vary from engine to engine. There is not substitute for checking that these tolerances are correct. This is especially critical when mixing camshaft and pistons from different engine builders. One of the correct and easiest ways of checking this is by using the "claying the piston dome" method.
Call DRI or consult a professional technician.

What is the difference between a billet and hardfaced cam?
Billet cams are sold outright with no core required. They are machined in the USA and are specially heat-treated for wear resistance. Billet cams are used when problems arise in the hardfacing process of stock cams.

Hardfaced cams are made from stock cams. In the hard facing process, stock cam lobes are welded with a hard surfacing alloy to increase durability as well as provide additional stock for high-lift profiles. The stock cam (or stock ?core?) can then be ground to almost any desired lobe shape.Some models such as YFZ 450 prohibit this type of modification because cam journals can distort in the welding process.