Honda 400EX Camshafts

Honda 400EX Camshafts

CAM TYPE: Hardfaced made in USA.

CORE REQUIRED: Stock Camshaft.
No Billet camshaft available for this model


X1H Grind Camshaft
Part #: MC-196X1-H
Specifications: Bottom/Midrange Cam, Lift: .346", Duration 246°
Application: Woods/Cross Country
Notes: 1, 4, 5

X2H Grind Camshaft
Part #: MC-196X2-H
Specifications: Midrange/Top End Cam, Lift: .378", Duration 254°
Application: Motocross/Sand Dune Riding
Notes: 1, 4, 5

X6H Grind Camshaft
Part #: MC-196X6-H
Specifications: Maximum Top End Cam, Lift: .402"/.385", Duration 270°/262°
Application: TT/Drag Racing
Notes: 1, 2, 3, 4, 5


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 $236.00
5.Customer must send in stock rocker arm cores. The poor quality of the OEM hardfacing requires that the rocker arms be re-hardfaced to match the camshaft. The price for hardfacing rocker arms is $65.00 per arm (4 qty). This is mandatory for warranty. If no cores are supplied, customer must pay rocker arm core charge of $176.00.

No Billet camshaft available for this model.

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

ROCKER ARMS: The cams uses stock OEM rocker arms. Due to poor quality OEM hardfacing, it is highly recommended that the (4 qty) stock rockers are welded and rehardfaced to match cams. Additional $65.00 charge per rocker arm (4 qty) applies. This is mandatory for warranty.

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


RD-267H Heavy Duty Valve Springs w/Titanium Retainers $169.66

RD-268H Heavy Duty Valve Springs w/Chromoly Retainers $137.86

30-3120 Shortened Bronze Guides 19.95ea


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

Valve to piston clearance MUST be checked on ALL high performance cams. We recommend .060° clearance for both in take and exhaust valves.

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.

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.
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