MOPED ARMY

i'm pretty sure stock bing on a 2HP is 14MM, and the 15MM was an upgrade for those who had smaller carbs that that, like 12MM.

correct me if i'm wrong...

A 19mm Dellorto PHBG will give the best performance, but is also harder to tune. You could probably find a 16 or 17 PHBG if you are worried about "over carbing" but I don't think that is a big deal. If you want easier and cheaper you can make do with a 15/16 Dellorto or 15 Bing on a small kit.

To tune a carb, beyond the idle screw? What else is tuneable? I found the Dellorto on treats, noticed there is different choke options.

Pull// which is the bing style?

Lever// like the tomos dellorto?

Cable//which would lead up to the handle bars?

What does PHGB stand for? I like the suicide pull choke, which would lead to a cable choke?

Is the intake a big deal? Thats the part from carb to engine..cha?

Ill end up with a mellow kit that keeps me on the road with low maintenance. For real the tires on the maxi are so small I dont wanna go tooo fast.

Keep the info coming if your down.

Thanks!

It seems Ive looped a fair crowd, so Ill ask too many questions. (Im basically the only moped shredder in my town, so here is where I learn) When it comes to kits, I see metrakit as one of the better? Ive seen polini around alot too. Whats my best bet for a decent kit?

what pipe do you have now? with the stock cylinder, a decent pipe and the 15 bing you should be able to get good speed while staying reliable. if you're not satisfied then, jump to the kit and carb

my 2 cents...

Ok so my 2 cents on this. Bing is easier to tune less to mess with etc... Dellorto you have a lot you can tune tweak and mess with. So if your looking to go as fast as you can go with a dellorto. If you just wanna ride and aren't worried about racing anyone stay with the bing. The SHA carbs are single jet carbs like the Bings they're just cheaper to buy. The PHBG and SHA is just the model of carb. The AS/DS/CS/etc... if I remember right is how the carb attaches to the intake (that piece the goes from the carb to the engine). Hose mount means theres a hose that attaches the carb to the intake clamp means the carb its self clamps onto the intake. The intake is a small deal. No point in putting a 20mm carb on a 12mm intake as you can only flow 12mm worth of fuel and air. So intake should be of equal or greater size than the intake withing reason. If the intake is too big you're not gonna be able to mount the carb on the intake. Pull choke means theres a nob you pull on to set the choke lever means theres a lever you push on and cable means you can attach the other end of the cable to what ever you want. If you look in the wiki theres a ton of info and also a step by step guide on how to tune these carbs. As you do it more you'll get better at it. Also the Polinis are fast..... very fast. The metra's are alot more forgiving and can be decently quick. Soft seized my metra 65 twice thing still runs like a top.

Turns out I do have a 14mm. Its totally stock. Your saying with my stock bike a 15mm bing & a good pipe the puch can be at 50mph? I overmixed the gas/oil at 25:1 (I swear it said that mix on the side cover) & I was getting up to 30mph. The bike has 624 original miles. Carb has a busted top gasket (bings are hard to put back together I thought. That damn top gasket) So Im going to make my own until I order a new part.

Theres a polini 64 kit with a 50 hi hi head. What components deciphers the engines cc. I dont understand the 64cc kitt with a 50cc head.

Thanks

i dont think youll get a whole lot different performance moving from a 14mm bing to a 15mm. carb size is not quite as important as other aspects...you can have a fast bike with a small carb easy.

dont overmix the gas. that will not help your performance. 50:1 is a safe starting point, adding more oil will only bog you down.

top gasket isnt even needed. i never ran one on my bing or my dellortos and it made absolutely no difference.

the engines CC is determined by the size of the bore in the cylinder. lets say you have your stock 50cc cylinder, when you look down it, its this size visually: o ...but you look down an 80cc cylinder and it will look like this: O ...horrible example but it kind of explains it.

disregard the cc rating on a head, those treats 50cc heads are just designed to be used with a 50cc engine, but since your piston never touches the head (ideally..) it makes no difference.

Don't rob yourself of possible speed. Check and lube your drive chain, make sure your brakes arnt stuck, tires to correct PSI, maybe new petcock as well as fuel line, also with your nasty gas tank a fuel filter on your g

as line.

For my friends I suggest polini case matched 15 bing estoril pipe.. Works for sf and my friends that wanna ride and not bother with tuning

Polini, 15 bing.. My first set up and it did me no wrong. The real learning came when I went phbg.