The SRmoto 2019 Honda CRF450L Supermoto Conversion

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SRmoto Build #20

One of the great things about dual sport bikes like the CRF450L is that it can be two bikes in one. With the stock knobbies, you have a high performance off-road bike, and by adding a set of 17″ supermoto wheels and tires, you also have a very capable corner carver for the street.

Converting a CRF450L to a supermoto is pretty straightforward. All you really need is a good set of 17″ supermoto wheels like the ones we use from Warp 9 Racing, and then some sticky tires like the Dunlop Q3+ we use (see details below). There are a few things you need to do to fit the smaller 17″ wheels/tires. Up front, in order to clear the smaller 17″ supermoto tire, you have to re-route the front brake line to the outside of the fork leg and also trim the plastic lower fork protectors so the front tire doesn’t rub. On some dual sports, you need need to source a shorter kick stand so the bike doesn’t stand straight up with the kickstand down…. but with the CRF450L, you don’t need to, and the stock kickstand works just fine. As for a rear sprocket, the gearing you choose is a personal preference type of thing, but on our bike we went with a 50T rear sprocket at first, which is one tooth smaller than the bikes stock rear sprocket. For a supermoto, we didn’t really care for that gearing, and now we are running a 46T rear and like that much better.

Here’s what we’ve done to the bike so far, and some of our future plans…

SUPERMOTO WHEELS/TIRES/MISC STUFF:
• Warp 9 Elite Supermoto Wheels
   – Gold Rims, Black Hubs, Silver Nipples, Silver Spokes
   – Warp 9 Racing Rear Sprocket, Black, 46T
   – Stock front brake rotor
   – Coming soon… 2-piece floating Warp 9 Front Rotor
• Michelin Front and Rear Inner Tubes
• Dunlop Q3+ Front Tire (120/70-17)
• Dunlop Q3+ Rear Tire (150/60-17)
• Warp 9 Front/Rear Axle Slider Set (Red)

ENGINE/PERFORMANCE:
• Yoshimura RS-4 Full Exhaust System **
• Twin Air Pre-Oiled Air Filter
• JD Jetting EFI Controller
** NOTE: This exhaust system is only approved by Yoshimura for the CRF450X off-road bike. It is not currently recommended or approved for use on the CRF450L dual sport. To make our bike run properly, we are using a JD Jetting EFI Controller and have adjusted the Controller settings to JD Jettings recommended settings for an aftermarket exhaust/air filter.

LIGHTING/ELECTRICAL:
• 12oClockLabs Integrated Tail Light / Fender Eliminator
• License Plate Frame, Black
• 12oClockLabs Fixed Rate Turn Signal Flasher
• 12oClockLabs Speedometer Calibrator

HANDLEBARS/HANDGUARDS:
• Stock Renthal Handlebars
• Zeta Handlebar Riser Kit, 30mm
• CRF450L Cycra Ultra Probend CRM Handguard Package
• Pro Taper Sport Bar Mount Cones for Honda (Black)
• Pro Taper Pillow Top Grips (Grey/Black)
• G2 Tamer Aluminum Throttle Tube
• CRF450L Supermoto Street Mirror Package
• Honda Mirror Hole Plugs