Urban variator

garrett truebenbach /

I have an 83 urban stock 50cc with pipe and vm20 with a 200 jet and runs great only prob is with the stock belt but it only does like 33 on a flat and I think the only reason is the gearing so I bought a 31 belt but take forever to accelerate . I think I need to put lighter wheights in the vario but I don't know how to do that where to get them or wich ones I need / fit on it

Re: Urban variator

16x13 weights, treatland, get a scale.

Re: Urban variator

Probably too large of a carb as well for a stock cylinder.

Re: Urban variator

Dirty30 Dillon /

Whoa, that's a fat jet you're running. Sounds like you've got a leak somewhere that's killing your power and being overcompensated with jetting.

Re: Urban variator

I don't even know what a urban is, but it's dual variated right?

If so, going down from the stock 33 to a 31 belt would just fuck up the variators range and could snap the crank. Thats if the numbers you are posting are refering to belt length.

Re: Urban variator

The bx31 is not actually 31 inches long.

Re: Urban variator

Jet sounds fat too. I noticed that was odd as well?

Re: Urban variator

garrett truebenbach Wrote:

-------------------------------------------------------

> I have an 83 urban stock 50cc with pipe and vm20

> with a 200 jet and runs great only prob is with

> the stock belt but it only does like 33 on a flat

> and I think the only reason is the gearing so I

> bought a 31 belt but take forever to accelerate .

Forget my last post, I somehow read this as your stock belt was a 33 and now you are running a 31...

Re: Urban variator

garrett truebenbach /

So I opened the variator and there is like grease all inside covering the weighs Is that suppose to be like that I will post a pic in the morning but if I put new weights should I leave the grease/oil in or clean it out

Re: Urban variator

Yes the pulley is greased and the dust cover has a gasket. The grease is for low maintenance and long life of the weights.

Re: Urban variator

Take half of the stock weights out, It takes a few minutes and is a big improvement. Might not get you to where you want to be but it's a quick free mod.

Re: Urban variator

garrett truebenbach /

I did take half out it runs a lot better

Re: Urban variator

#CrazyWayne™ rocks. #CrazyWayne /

Put a yellow 1,500rpm contra spring in the back.

Your cylinder is stock so start with 5gram rollers.

and do some porting.

Re: Urban variator

garrett truebenbach /

The yellow spring will that just make the clutch grab later ?

Re: Urban variator

No it will resist the weights and make them act lighter. You are thinking of clutch springs.

Re: Urban variator

Kevin Bishop /

take a 1/8' or 3/16" drill bit and drill out the center of your weights then maybe ramp and put windows in your vaiator

Re: Urban variator

The pulley is a 6 roller, don't just throw hobbit tactics out and transplant them. There is really no need to notch or window anything. The bike will outgear the power it makes long before that.

Re: Urban variator

Kevin Bishop /

Then get rid of the grease and go with graphite instead.

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