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.

Product Information:
YAMAHA RAPTOR MODELS:
2006-14 (dual EX port)
2015-21 (single EX port)
PRICE: $499 when cam core is sent in
Core Charge $325
New Camshaft when no core is sent in $795
CAM TYPE: Hardfaced made in USA. (On OEM Cam Core)
CORE REQUIRED: Stock Camshaft.

GRIND OPTIONS: X1H or H2H
X1H Grind Camshaft
Part #: 294-X1H
Specifications: Bottom/Midrange Cam, Lift: .420’/.385", Duration 246°/244°
Application: Trail Riding/Woods/Cross Country
Notes: 1, 4, 5
X2H Grind Camshaft
Part #: 294-X2H
Specifications: Midrange/Top End Cam, Lift: .480/.445", Duration 264°/260°
Application: Aggressive Sand Dune & Trail Riding/Drag Racing
Notes: 1, 3, 4, 6, 7

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.Customer must send in stock camshaft core. If no core is supplied, customer must pay core charge of $325.00
5.Rocker arm clearance (cam lobe to rocker) must be checked .
6.Rocker arms (both IN and EX) must be modified. Due to increased cam lobe size; material must be removed from rocker arms to allow for proper cam lobe to rocker clearance.
7.Head casting must be modified to allow for camshaft to be installed in head.
* For specific information regarding camshaft notes contact a DRI technician.

CAM SPROCKETS: These cams use stock OEM cam sprockets or aftermarket slotted/adjustable cam sprockets.
ROCKER ARMS: The cams uses stock OEM rocker arms. Rocker to cam lobe clearance must be checked. On X2 Cams a rocker modification is required.
**See all Cam Notes and call DRI for more information.

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

CAMSHAFT ACCESSORIES
#80-80410 Heavy Duty Valve Springs w/Titanium Retainers $229.00
#80-804290 Shortened Bronze Guides $19.95ea
#DR-80400 Oversized Valve Kit (s/s +1.0 In & Ex) $230.00
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.