Jump to content

2011 crf450r

Recommended Posts



Honda made the same changes that the tytpical CRF450 owner made last year; That's good engineering; The CRF250 gets a new map, muffler and HPSD damper

2011 Honda CRF450.

Honda press release: Motocross is a battle, and you’d better bring your “A” game whenever you show up—either that, or be prepared to eat a bucketful of roost. But when you’re on a 2011 Honda CRF450R it’s everyone behind you who’ll be savoring that dirt-flavored banquet. Why? Because we’ve given the CRF450R some serious upgrades.

First, the 450 gets a new 46mm throttle body, new fuel injector, and new ECU mapping so the engine makes more low end and midrange torque, and also offers even better throttle response. The power is easier to control, but without any loss of top end—better than ever for intermediate and expert riders alike. And our chassis designers were just as busy, updating the CRF450R subframe and taking the opportunity to fine-tune the subframe's stiffness. A new rear shock link and lower shock mount for improved front/rear balance and better suspension action especially over square-edged bumps.

And finally, new 2011 AMA rules state that every MX bike will have to meet the new 94 decibel rule. Both our CRF450R and CRF250R do that easily, thanks to a new exhaust system that works in conjunction with the new FI settings. So while the other guys might just change a muffler, that’s just where we started. And the first time the gate drops, it’s gonna show.


Engine Type: 449cc liquid-cooled single-cylinder four-stroke

Bore And Stroke:96mm x 62.1mm

Compression Ratio:12.0:1

Valve Train: Unicam, four-valve; 36mm intake, titanium; 30mm exhaust, steel

Induction: Programmed Fuel Injection (PGM-FI), 46mm throttle body

Ignition: Full transistor with electronic advance

Transmission: Close-ratio five-speed

Final Drive: #520 chain; 13T/48T

Front Suspension: 48mm inverted KYB® Air-Oil-Separate (AOS) with rebound and compression-damping adjustability; 12.5 inches travel

Rear Suspension: Pro-Link KYB single shock with spring preload, rebound damping adjustability, and compression damping adjustment separated into low-speed and high-speed; 12.6 inches travel

Front Brake: Single 240mm disc with twin-piston caliper

Rear Brake: Single 240mm disc

Front Tire: 80/100-21

Rear Tire: 120/80-19

Wheelbase: 58.7 inches

Rake: (Caster Angle): 26° 52'

Trail: 114.5mm (4.5 inches)

Seat Height: 37.6 inches

Ground Clearance: 13.1 inches

Fuel Capacity: 1.5 gallons

Curb Weight: 236 lbs

Link to comment
Share on other sites

I am kind of ... "WHAT???" ... I don't understand why EVERY YEAR Honda keeps people waiting for the launch of their next model year, while EVERYBODY else has already introduced their bikes.

Sure I can see it if there are a lot of changes, but new mapping, shock link and HPSD ... seriously ??? ... that was the "big wait" 😏 Oh and a longer muffler.

Looks nice overall 😏

Link to comment
Share on other sites

The 46 mm TB would be inline with the rubber intake manifold as the 2009-2010 TB tapered from a 50 mm plate to 46 mm @ the rubber manifold . I have modifyed the KX450 f TBs to 45 mm with a speceil TP and was able to get them to flow with in 20 cfm of the hondas .

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

  • Create New...