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Uberscoot 50cc BZM Polini

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  • Uberscoot 50cc BZM Polini

    Just finished so I thought I'd post a pic. Started off as a stock Uberscoot two speed scooter. Added Polini 910 rims/tires, Polini 6.2 engine with black insert crankshaft, BZM 50cc cylinder kit, and 15mm carburetor. Had to install above engine level gas tank due to float carburetor. Expecting 50 to 60 mph at 12 horsepower. Test ride coming next week.
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  • #2
    Pretty cool! So is that a big bore kit then? What is the stock displacement? And what did it take to mount it?

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    • #3
      Fortunately, it's not that hard of a modification with the Evo style scooters. The right side engine plate provides a nice flat surface for drilling the engine mount pattern. I started with a Polini 6.2 pocket bike engine. They come standard with 6.2 horsepower and are 40cc. I ordered the BZM 50cc air cooled cylinder kit from Italy. Much easier to deal with than water cooled...I've done those too. The kit is a direct bolt on. I already had the larger carburetor and exhaust to accommodate the larger displacing 50cc head kit. I had to drill the four mounting holes on the side engine plate to accommodate the Polini pattern. I also had to use the Polini clutch drum which with a small modification fits perfectly onto the Uberscoot transmission. It's like they were made for each other. But these things are like quarter mile race cars. I would not take one on a long ride. I use my Active powered Uberscoot for 20 mile rides all the time...it's the Toyota Camry of scooters.
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      • #4
        Thats hella sick...love the set up on it hows the gearing on it.whats the top speed on it

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        • #5
          Not sure on the gearing. I know the front is the stock 11 tooth. I switched out the back for a smaller one...probably 38 or 40...stock is 52. Got it up to 45 today but keep running into stop signs and red lights. I need a long strip without fear of cross traffic which is hard to find in Los Angeles. Might take it to an airport nearby soon. Stay tuned.

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          • #6
            I am actually looking to build a GSR, where can i find the complete BZM 50CC Race engine.?

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            • #7
              Originally posted by lonehead View Post
              Just finished so I thought I'd post a pic. Started off as a stock Uberscoot two speed scooter. Added Polini 910 rims/tires, Polini 6.2 engine with black insert crankshaft, BZM 50cc cylinder kit, and 15mm carburetor. Had to install above engine level gas tank due to float carburetor. Expecting 50 to 60 mph at 12 horsepower. Test ride coming next week.
              Where can i buy complete 50cc BZM Race engine for my GSR Rolling chassis

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              • #8
                Originally posted by lonehead View Post
                Not sure on the gearing. I know the front is the stock 11 tooth. I switched out the back for a smaller one...probably 38 or 40...stock is 52. Got it up to 45 today but keep running into stop signs and red lights. I need a long strip without fear of cross traffic which is hard to find in Los Angeles. Might take it to an airport nearby soon. Stay tuned.
                Hey buddy I'm looking for a spot in LA so I can speed test on my gsr

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                • #9
                  Sorry for the delay. I order my BZM parts from https://www.bizetamotor.com/en/ The website is super friendly, paying is a breeze, and even though they are in Italy, they usually ship next day and I get it within 10 days or so. That is super fast by Italian standards for shipping. Other stuff I've ordered from Italy can take a month.

                  I started with a Polini 6.2 motor and swapped out the head and piston with a BZM 50cc kit which comes with a cylinder head and piston. The cylinder cap is sold separately. They are also good about responding to questions. You can buy all the parts from them to build a complete BZM engine but that gets expensive. I have a bunch of like new Polini 6.2 engines that I took off of pocket bikes in case you're interested in one to build your BZM engine.

                  As far as a spot for testing speed on a go-ped (GSR) in Los Angeles, they are tough to come by. I did find some long straightaways on my last ride (early Sunday mornings) behind Playa Vista on Bluff Creek Dr but you might only get a few passes out there as it is very quiet with very wealthy dotcom residents who would probably call the police pretty quickly. Admiralty Way in Marina Del Rey is also a great spot where you can do a lot of runs with not pissing anyone off.

                  I'm thinking of starting a small group to ride on the west side of Los Angeles. My typical ride is just under two hours, 20 miles, with stops in Santa Monica, Venice, Marina Del Rey, Culver City, and West Los Angeles on Sunday mornings leaving between 8 and 9am. If anyone is interested, hit me up. We stop at all lights, ride on the right, and never piss off cars or people. Full gear and helmet a must. And there a several straightaways on the route for testing top speed.

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                  • #10
                    Pm’d

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