Size Matters. Maddog 50cc Variator Size Tested for 139QMB. 50MPH!

[@christophersherratt7299]

Draw around it so you have a accurate size and don't over do it

[@joshgnzlez116]

nice video Sir, Thank you very much. I have a stock variator (& clutch) on a (139qmb)I'm running almost full diameter/lenght on the variator side, kind of scary keep adjusting it cause I dont want the belt fall off 😅. *Tao Tao 139qmb - with BBK , stock: clutch, variator, cam, carburetor , still runs 42mph, I weight approx 205lbs

[@GhettoWrench]

Are you sure your belt is the right size? Sounds like the belt could be a few mm too long and not dropping all the way down into the rear (clutch). Also how thin is the belt? It should be about 28mm wide I think. A narrow or worn belt could be an issue also.

[@christophersherratt7299]

The variator plate ram use longer boss i thinking why not heat it up press it flater

[@GhettoWrench]

Hmm. That's a really good idea. Why not? Cause I didn't even think of it. LOL. I have a huge press at the shop that will flatten nickles. I would not even have to head it. I could just press it a couple of mm. Damn. Thanks!

[@christophersherratt7299]

I Must of missed this video knowing you have a tool shop take the high point on variator down on your lathe so they come closer together why not have a go at casting your own stuff

[@GhettoWrench]

Another great idea. I like your flattening the ramp idea best. I can handle that. Then I could use that NCY variator on the cheap.

[@sethaustin5086]

What’s your belt size ?

[@GhettoWrench]

@sethaustin5086 maddogs are strange. The case is actually "extra long" so it takes a 788-18-30 belt. That is the only size I have ever used on the 50s

[@randyalmonte1431]

What kind of carburetor is on there? I have the same bike wanting to upgrade mine.

[@GhettoWrench]

Stock 19mm CVK. Waiting for the new one getting a kiehin 21mm PWK

[@randyalmonte1431]

I ordered a 21mm last week. I’m still waiting hoping it works out good.

[@randyalmonte1431]

What’s the best clutch and clutch bell to go with it

[@GhettoWrench]

@randyalmonte1431 I think it will. When I get the one for this bike I will make a video of any issues.

[@GhettoWrench]

@randyalmonte1431 honestly I have not tried anything but stock ones yet. I think I want to try that rolling wrench Reveno dirtbike style clutch in the 150, but super expensive. I have not researched the 50 clutches too much yet.