kit for moby

i really want a 70cc kit for my 50v, but cant find one anywhere. what the hell? am i just shit out luck here? or does anyone have any ideas?

Re: kit for moby

TIP: www.mopedjunkyard.com just got 70cc airsals in for 200$

Re: kit for moby

and now that I said something better hurry up and order one b4 they are all gone =) And say thank you

Re: kit for moby

look under Motobecane-engine parts

Re: kit for moby

thank you. you truly are the king of kings.

Re: kit for moby

just ordered it. awesome.

Re: kit for moby

It's such a shame, the airsal kit is nothing like the other two. It's not even 70cc, it's 66cc (45mm). It's not a bad kit, more like a larger version of the stock cylinder.

Re: kit for moby

Can someone please tell me about my Autisa kit? It looks a lot like that Airsal, and I measured the cylinder st about 45mm.

I have never once heard of another person with an Autisa 70cc kit (though I have heard of someone with a 50cc Autisa on their Moby). So, do I really have a rare Autisa kit or just an Airsal I was told was an Autisa?

Re: kit for moby

nickj from kzoo has a 70 autisa.

when devin built your engine a million years ago im pretty sure he just had that kit lying around, or he bought it from mopedwarehouse. its not rare, just discontinued much like all ancient technology AV7 kits. or it could be an airsal. havent you even looked? it probably has stampings. i swear to god though you mention it in every single motobecane related post since 2005.

45mm = about 66-67cc

46mm = 70cc

Re: kit for moby

wow good to hear about another one out there. But umm yeah Im sure the original poster appreciates me mentioning it in this particular post.

Re: kit for moby

i appreciate everything you do.

Re: kit for moby

so my moby has the 20 mph engine, and i have been told that to fit this kit it might take some doing. anyone know what i'm in for? i also have a seized 30 mph engine, should i just get that one up and running with the kit? suggestions?

Re: kit for moby

Depends: one, is it variated or not. You definitely want a variator on your kitted Moby. You also want a bigger intake and a dellorto carb. An adjustable variator from Treatshq on ebay would be nice as well. If your other motor is seized at the top end but the rest is ok, then just put the kit on it. The kit pretty much replaces the whole top end enyways. Also, Im not positive on this one but I think the only difference in the motors other then the variator would be the size of the stock intake and carb. In other words, if both engines are variated then their bottom ends should be exactly the same. Not sure though so dont quote me on this one...

Re: kit for moby

they are both variated. not sure the extent of the problems with the 30mph engine. i'll probably just skip that. i have a dellorto 15.15 carb, but will be getting a 19mm when i get the money.

thanks for your help.

Re: kit for moby

A bottom is a bottom as far as 50v goes.

Re: kit for moby

awesome. wish me luck.

Re: kit for moby

I think we have established that there are differences in the cylinder on the 20mph model, but not the bottom ends. I would think your bottom end on the 20mph would be a good choice since it has had less power put to it throughout its life, and would therefore be less worn.

Re: kit for moby

beware that there is actually a 20mph bottom end that is different and is not clearanced for the skirt on the standard 30mph cylinder. All the other parts are interchangeable with each other so if you have a variator you can put it on any crank.

Re: kit for moby

wait, i'm confused now. if it is variated, it will be cool? i think thats whats you're saying. right?

Re: kit for moby

If it is variated, it will be very cool. It will also perform better (better gearing). A CVT (aka a variator) was first put on a vehicle by Motobecane, a year after it was invented (I think in the 50s). Since then, they have been become very popular on mopeds and scooters, and they started to be used on cars I think in the 80s, though very rarely. Once the Honda Insight came out, the first hybrid, they started being used much more frequently on cars, and now they are an option on a wide range of cars including basically all Nissans, and even a very off-road capable jeep (I mention because there is actually a jeep now that is not so off-road capable).

Re: kit for moby

🇮🇹💦 Of the Loin /

the 20mph bottom ends have a ridge, making them unuseable with any other top end.

you have to use a 25 or 30 mph bottom end.

Re: kit for moby

fish_SHARK /

im wondering if the ridge is only on non variated bike or only the non variated 20mph version

the only ridge ive seen was on a dimoby bottom end, though i do have a handful of different cylinders that have the accommodation for the ridge.

ive tried to grind the outside piston skirt to fit into the ridge, im willing to say it wont work with out a lot of work, and perhaps the right tool.

Re: kit for moby

okay, so it looks like i will be using the bottom end from my seized 30mph. just to be safe. the way i figure it is that there is no reason to disassemble the 20mph if i'm not sure if its going to work. plus, why the hell not get the 30 going and throw the 20 on another frame. fuck. this is going to happen. one way or another.

Re: kit for moby

I put a 70cc Airsal on my 20mph dimoby... had to grind out the case to remove the lip and match up the transfer ports. In my opinion it doesn't take too much more work than port-matching any jug to any case. Then put on a tunable variator, which you might wanna do for performance anyway.

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