Category: Daggrs Gr1 project

Test ride: Tomahawk clip-ons and pulley Xtreme kit

Last night I test rode my motobecane Av10 moped 50cc with the Tomahawk 28mm clip-ons and the Doppler clutch pulley with the Tomahawk Xtreme kit + push/pedal start one way bearing HFL 3030 wider than stock (I had to lightly grind the circlip to clear the shoe springs).


The tubes can be cut or inserted deeper but I wanted to test the widest position with the tubes 10.5 inches long from the clipon. Even though I was afraid that the aluminum tube gauge might be a little too thin, matching the standard handle bars steel gauge (to fit any bar end without drilling), they were actually strong enough after braking hard with my upper body weight on them and hitting the potholes of Los Angeles bad roads. The advantage is their super light weight and if you crash they’ll probably bend or break before the expensive CNC machined clipon part. The racing position with 8 degree angle felt good, I like them.


The heat treated 8mm posts + the triangle brace are bulletproof. The brace is not stainless steel so remember to wipe it with oil to protect it from potential rust. The push start HFL 30/30 one way bearing upgrade is wider and feels stronger than the stock doppler 30/20 bearing, with no shuttering problem. So far so good, the best one out of all the one way bearings I’ve been testing. The clutch pulley doesn’t shutter anymore. Thanks for the tip Naz! (moped builder and racer from Seattle).


Back from the ride. The clutch grabs a little late at high rpms with the strong clutch stock springs, feels good for track but might be annoying, loud, and fuel consuming for street riding. Also, my piston ring is completely worn out with loss of compression and power, the engine revs high but with less torque doesn’t pull as hard as it used to. The Bidalot 50cc kit is a 3rd hand with thousands of miles on the nikasil and a leaking exhaust ball joint, the port duration was also set for high rpms and top speed for the track, not low end power. I couldn’t go full speed, too dangerous with the cell phone is my left hand.


The raffle ended today Wednesday, Feb 1st 2012. Thanks everybody for the great feedback!

And the lucky winner is….


From the Mohawk Mammoths, Albany NY.

Congrats man! Email us your shipping address so you can rock those Tomahawk clip-ons on your bike soon.

From AV7 to AV10

Here’s a motobecane 50cc engine I built for a customer who wants to swap his av7 engine 2 ports cylinder inducted and experience the power of a better av10 engine 3 ports case inducted reed valve with lubricating holes for the crank bearings.

I’m using used stock av10 cases, used crank + new bearings and seals, new 50cc doppler kit, used stock RMZ head with decomp, used stock cdi (also have a back up new mvt cdi), new 19 carb, new doppler exhaust, new doppler er3 variator with bearing clutch function, stock double spring, no launch lever.

I’m using my wonder bread moby frame to test the engine, once perfectly tuned I’ll send it back to Chicago, ready to mount and blast after re-jetting.

If you’re interested in a similar set-up for your moby or build a whole bike just contact Tomahawk.

Short video 1st start a mano:

2h break in session with rich carburetion + heavy variator weights, and old doppler pipe (thx Tracy!)

The engine is ready for final test runs, carb and variator tuning. Then pack it and ship it.

Motobecane stock cases available at

AV7                                                                     AV10


Bonus pics:

Back from my meeting with Santa Claus after reinstalling my 50cc Bidalot engine, blasting everybody’s ears and racing some Ford Mustangs on Hollywood Blvd with my screaming 12,000 rpms pressing hard on the launch lever. I never get tired of it!

The perfect plug, the color looks richer in real with a nice light chocolate brown/brick red.