Re: 77cc VARIATED MOBY IT'S HAPPENING

Guess I'll have to retire my 53mph Cimatti Gran Prix.

Christophe, are you talking about the socal motorized bicycle race in October?

We're probably gonna have a separate class for mopeds...

Re: 77cc VARIATED MOBY IT'S HAPPENING

I saw something about tomahawkcup 2021 hashtag.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

ya that's the race I'm gonna try to get the bike ready for and have Reynie race it.

It's for my own fun, smell that 2stroke racing fuel in the pit again, rediscover the track with the new pavement, maybe ruined by then by the drifters :)

But also for the first time run something bigger than 50cc 12hp and hopefully drop the lap times under 1:10 min consistently vs 1:12 min, maybe not the first weekend out but we'll see... that's the goal.

Also get out the shop and get some sun tan :) (edited)

Re: 77cc VARIATED MOBY IT'S HAPPENING

my full rigid ciao goes 38 and thats way faster than a moby

Re: 77cc VARIATED MOBY IT'S HAPPENING

Maybe it's cuz I'm old, but I feel like anything over 35 mph on a moped is sketchy.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Tweaker trash /

> Hepatitis J [OFMC] Wrote:

> -------------------------------------------------------

> > Tweaker trash Wrote:

>

> > -------------------------------------------------------

>

> > My moby hits 50mph 3/4 throttle

>

> lol embarassing

Only if I tryed

Re: 77cc VARIATED MOBY IT'S HAPPENING

Nice! Scooter parts are a level beyond most moped parts. This is my derbi variant, modded to take a newer start v motor and bidalot cylinder. 97.5cc. Still getting it tuned in but definitely fun

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Re: 77cc VARIATED MOBY IT'S HAPPENING

🇮🇹💦 Of the Loin /

What is that radiator btw

Re: 77cc VARIATED MOBY IT'S HAPPENING

That radiator mount is incredible

Re: 77cc VARIATED MOBY IT'S HAPPENING

> 🇮🇹💦 Of the Loin Wrote:

> -------------------------------------------------------

> What is that radiator btw

Some mishimoto that was on clearance. Kx250 I think

> * wormdirt * Wrote:

> -------------------------------------------------------

> That radiator mount is incredible

I had this guy chillin from a past idea, had to angle it to clear forks at full turn. Might end up chopping it off and going bigger. Gets warm quick

Re: 77cc VARIATED MOBY IT'S HAPPENING

Right on. I don't think it's 100% confirmed yet, but I think we're racing at Apex in Lake Perris in October, not AVS/grange.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

I'm old too... but I ride a Tomos Sprint at about 43 mph top speed and it feels safe.

But I did crash 10 years ago during a group ride with a puch pinto full rigid frame at about 30 mph and it didn't feel good at all.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Oh ok. I thought it was at Apple Valley Speedway.

I've done some night racing at APEX way back in 2011 or 2012 with my Peugeot 50cc against some crazy fast e-bicycle, I couldn't keep up in the straight, not even close :) ... I actually test rode it and it felt almost as powerful as a 125cc or even 250cc 2stroke bike with insane torque.

Small but fun track, closer to LA.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Monster Derbi... wheelies all day !

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

My bad... I meant Adams Motorsports track is where I raced against monster e-bikes way back :)

But I've raced at Apex couple of years ago.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Yeah, those were the races I put on at Adams. Awesome track, but I think they banned motorized bikes and mopeds.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Yeah I have some good memories of the night races, the motorzied bicycle racing scene is definitely fun and committed.

Looks like the drifters took over that one too :) ... generates more money for the track owner, makes sense...

Re: 77cc VARIATED MOBY IT'S HAPPENING

Mitchell Hoover /

Those numbers are insane, ill have to look into the race at Apple Valley. Should be my first race on my bike. Hopefully Shane and Tim can make it out?

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Just finished the bottom end assembly in good old basement.

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

I'm using some SKF bearings and seals + hand cut gasket. (edited)

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

All went well, the crank spins super freely. I just need to find and install the seal retaining circlip on the variator side.

Then work on the top end assembly, ignition and transmission.

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Re: 77cc VARIATED MOBY IT'S HAPPENING

SKF not what they once were in my experience. I will be curious to see how they hold up. I would go KOYO myself.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

That's true. These C4 felt ok during assembly, We're gonna find out.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Back from a session in the basement... aka "Batcave" or "James Bond room"... named by few people who visited it over the years :)

Cylinder, piston, and head clean up. The kit is stock, zero porting.

Setting the squish with different base gasket thickness.

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Setting the compression ratio and port duration.

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Final assembly, et voila...

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Looks great. Stoked to see that on a bike. Whats the details on that Variator?

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Thx.

It's a discontinued Bidalot scooter variator with weight arms instead the most common roller weight variators in 17mm belt size.

Not that you can't find tune a roller weight variator, but I'm used to this type of variator and wanted to try it on a monster setup. Plus, I don't have to deal with the roller weights falling off every time I remove the belt.

I replaced the guide plate with a thicker one custom made, my good buddy Shaw the SoCal moped guru welded a very long time ago the scooter kick start nut that comes with splines inside, to secure the variator plate on the crank.

Re: 77cc VARIATED MOBY IT'S HAPPENING

Christophe Naulet /

Finally, after so many years sitting on the shelf... just got too busy fixing customers bikes or engines, never had a second to work on my own project, which I was ok with... running the moped shop first, playing with mopeds second. But I'm glad I pushed myself and found the time to make it happen. This thing looks like a beast!

Installed the carbon fiber reed block, intake, 28mm carb, PVL ignition, Bidalot variator.

Phase one is done, but there's still plenty of work to be done... can't wait to twist the throttle...

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Re: 77cc VARIATED MOBY IT'S HAPPENING

Tweaker - cool bike, but that GR1 setup is nowhere near the level of what Christophe is building. ( i mean that nicely) He is going to have serious trouble keeping the front end down, especially with a light pilot like Reynie. I am very excited to see this thing rip, and maybe get a chance to ride it.

Glad to see you are working on a cyclomoteur de course Christophe. See you in October I hope.

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