MOPED ARMY

it sounds like you might just need a new belt actually. 4L320 or 17321, hardware store or auto store your choice.

the A speeds are 30mph versions, and it will go about 30, although they tend to just keep picking up speeds (i can hit about 35 or so on a flat)

the 51v's were never really introduced in the states. The engines are reed valve unlike the piston ported mobys which are pretty standard.

Basically the 51v's are desirable because all the kits for mobys are reed valve kits, and so the 51v motor is perfect for it.

Speaking of which I would love to buy one of those 51v engines, intake and all off you

yea they look really neat. Both of them are 1981 models. A belt...? didn't think of that but I dont think thats it because the belt on it seems pretty good. oooo Thats cool how the 51 motors can be kitted. Well I bought 3 and my dad is going to take 2 of them and I'll only get one even though I bought them so I mean, I'm still thinking about which to take. The 51v need a considerable amount of more work. The 50v is almost totally complete. I think because I have a batavus project and a puch maxi project I'm going to take the easy way and go for the 50v. We have had some verrrry fast motobecanes. I new about the speed classes but the thought never entered my mind that the ones we had were of different class. It explaines why our old rusty one flew by the mint one. It was a higher class!

One of the 51v's is a C class and the other is a B so I think I'm getting an ok deal.

After all, we drove a good 150 miles or so to get them. Yea we have relatives in the area but had no intention of going proir to this deal. I'm really pumped to get that A speed on the road. According to my father we've never had one and that old rust one was a real beast! Whoooo!

Ok, thanks for all your help guys.

My dad is a mechanic but the more brains on this the easier it will be to get it running. think we wil want to hang on to the 51v's but I think that once I get this 50v all good and running and a reall sweet moped, I'll sell it in the spring. The nicest thing about the 51v's is the seat. It's easily big enough for 2. I mean, with room to spare. These motobecanes even had racks and mint clean tanks. O Yea!!!

Any other thoughts on my issues be sure to share!

Thanks For Your Help!

Jim

well I can't really check for spark cause the magneto doesn't move very fast when ya pull in the decompression. Not the kill switch. there is definately some kind of clutch issue with this one here...

Jim, you can check for spark just by turning the flywheel/magneto by hand... pull the plug, hold it against the engine block, and give the flywheel a (clockwise) spin. With the plug hole wide open, there will be no compression so it should be relatively easy to turn. If it's hard to turn, you may have found your problem-- rusted crank or something like that.

abd to everyone looking to buy a motor, I think we'll hang onto them for now

LAME

you better build a sick moby if ur gonna hang on to them. 51 engines should not just be sitting around in the garage.

replace the belt you'll be surprized, get the 17321 from an autoparts store

i could be wrong but your description points right to the belt, also make sure the decompress is actually working.

lemmy know how it goes good luck.

ok. I thiunk we have 5 moby's maybe 6 so I'll go give it a try. got so many parts I know we have belts here.

Thanks

Jim

huh. and it isnt the belt. pulled the clutch apart and something aint right.

buy yourself the 14/14 dellorto replica from davesmotors it will go even faster

same, do you have a biturbo on a moby? I'd like to see a pic if so.