uberscoot 2x50cc - Pocket Bike Forum - Mini Bikes
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post #1 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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uberscoot 2x50cc

this aftermarket exhaust isnt specifically made for my scooter and same with this carb, should i do anything to this exhaust with expansion chamber and silencer? i cant figure out how to correctly adjust this carb.
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post #2 of 60 (permalink) Old 3 Weeks Ago
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its down in the top sometimes they use glue to seal the adjustment access

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post #3 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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thank you, im trying to figure out where it is ur talking about on the carb
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post #4 of 60 (permalink) Old 3 Weeks Ago
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be carfull this is a very sensitive idle adjustment
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post #5 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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ok i got it, what about my exhaust and silencer? thanks for all the help
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post #6 of 60 (permalink) Old 3 Weeks Ago
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you can take off the muff box drill a hole throw the baffle plate reach inside there with some neddle nose pliers twist it up then rip it out bolt it back on enjoy extra power and music

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post #7 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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what about get a new cheap engine that i can use bore kit with?
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post #8 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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that will go on my 2x50cc uberscoot
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post #9 of 60 (permalink) Old 3 Weeks Ago
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the reed inducted CAG engines downfall is the reeds it wont like running at high RPM for extended time the reeds will warp and you will be on the side of the road flipping them a lot (in seattle and spokane the scooter speed limit is 18MPH so it wont matter but in Cali i think its 30mph (call the police and ask on this) so you want the piston ported engine like the one you have...

you can get a euro engine but how phat is your wallet ??? euro race engines are exspeisve both to get and run.

you can put a 2 peace head kit on that once you become a advanced builder you can do a head chop...

The other thing is the CAG engine puts out less power then the Piston ported engine so you have to put more into it to get the same power output... ...

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Last edited by MrKitty; 3 Weeks Ago at 12:27 PM.
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post #10 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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are these 2 good, the 1st one is 110$ and 2nd one is 150$
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post #11 of 60 (permalink) Old 3 Weeks Ago
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That's a reed inducted CAG engine...

You're going to see two styles of engines in the price range is that you're looking at the engine that you already have a 49cc Pocket Bike piston ported 2 stroke engine yes that's right the stand-up scooter would come with the engine that's best suited for it... ( it's a knockoff Mitsubishi blower engine)

Then you're going to see various cagllari engines (CAG) it's a reed inducted 2 stroke ( it's a knockoff Robin weed wacker engine)

Look at where the carburetor is mounted on the cagllari compared to where it's mounted on a real race poloni engine and then you come to realize the drawback of your air fuel mixture having to get a Beating Around by the crankshaft and connecting rod before it gets shoved up the transfer ports...
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Last edited by MrKitty; 3 Weeks Ago at 08:54 PM.
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post #12 of 60 (permalink) Old 3 Weeks Ago
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Re: uberscoot 2x50cc

Quote:
Originally Posted by jdignan View Post
are these 2 good, the 1st one is 110$ and 2nd one is 150$
Not good enough to hit the speeds you stated you wanted to hit in the beginning of this thread without disassembling the whole engine and building it the right way which involves a degree wheel...

The reed inducted Cag engine aka Robin NB-350 and NB-411 brushcutter engine's downfall is its a tool based engine plain and simple.Theres no truly a way to totally control the action of the reed petals that get directly battered and blasted by the velocity of a spinning crank also with the reeds installed against the way the crank rotates unless you use highspeed electric solenoids to control the reeds,,

Without building that cag accordingly and tuning it on methanol it just wont perform like a good old non-Chinese real motorbike 2 stroke engine..Methanol and alky have a lighter stoitchometric weight so they have a lesser effect on the way the reeds react and the higher compression ratio exhibits a higher crankcase pressure aswell....

Buy and slap an aircooled KTM50 knockoff engine with 9hp and youll be better set than that chinese tool engine or make a blockoff plate with crank stuffer in-place of the stock cag reeds and install a piston ported head with a 2pc headchop also reed mod on the reed inducted engine bottomend with a FCC and a totally balanced bottomend…

EPR has a sikk piston ported engine with FCC mod done to it already to rock n roll..And its for sale...


Good Luck.

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Last edited by CAM2; 3 Weeks Ago at 09:12 PM.
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post #13 of 60 (permalink) Old 3 Weeks Ago Thread Starter
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is this what ur talking about?
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post #14 of 60 (permalink) Old 3 Weeks Ago
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most of the realy fast scooter tuner guys are running the Blata R40 engine might be worth looking into.

its a lot smaller
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Last edited by MrKitty; 3 Weeks Ago at 12:51 PM.
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post #15 of 60 (permalink) Old 2 Weeks Ago Thread Starter
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i have 300$ and cant afford the blata r40 and polini motors but want to know what i can do with my budget?
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post #16 of 60 (permalink) Old 2 Weeks Ago
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i dont understand where your going with this?? the 49cc piston port engine (the one the uberscoot comes with) is one of the biggest of the china engines

the onley way to go bigger is to do major modifications to the uberscoots transmission and mounting system and buy a real race engine and all this stuff is going to cost more than $300

People that are doing scooter engine swaps are starting off with scooters that have the small engines like 33 to 40cc and then they will swap in an engine like the one that's on your Uberscooter or they will use a CAG engine that's a little bit smaller then the Uberscoot engine and then mod it

please stop spamming the site with requests to buy an engine that does not exist.... you have started enough Threads about your Uberscooter now please use your existing threads don't worry everybody that uses this site will see your posts...

Faster then a speeding E Revo

Last edited by MrKitty; 2 Weeks Ago at 11:36 PM.
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post #17 of 60 (permalink) Old 2 Weeks Ago Thread Starter
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ok sorry man, i just wanted to go little faster than 30mph, since i fixed the exhaust its been better, dont mean to spam but thanks for all the help
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post #18 of 60 (permalink) Old 2 Weeks Ago
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dont worry we can help you get there......

what are you doing as far as tuning it???

What fuel and 2-stroke oil are you running and what are you mixing it at????

Have you gone through and checked all the bearings in the wheels to make sure that they spin nice and free????

Do you have zero break drag????

There's a lot of potential for loss in drag in the transmission especially in those things as well you should check on all of those things and make sure all the chains and cogs are lubricated with high performance lightweight oils and that the bearings are good free and well lubricated as well.


Change your exhaust system to an actual scooter performance exhaust system thats made for your bike like the ones Cam2 showed you.

Get the Billet aluminum air intake and filter

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post #19 of 60 (permalink) Old 2 Weeks Ago Thread Starter
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ive got after market carb and that dumb exhaust, getting ready to gasket delete i just need yamabond, is this not the aluminum air filter
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post #20 of 60 (permalink) Old 2 Weeks Ago
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Re: uberscoot 2x50cc

Quote:
Originally Posted by jdignan View Post
ive got after market carb and that dumb exhaust, getting ready to gasket delete i just need yamabond, is this not the aluminum air filter
If you want more power youre gonna have to do more than do the gasket delete.....


You must widen the exhaust port 1/8" on each side plus raise the exhaust port atleast 1/16"

For the intake side you want to widen the sides 1/8" each side and lower it 1/8"

For the transfer ports you want to open them up a lil so the flowmore fuel then also polish them ...

You want to reshape the skirt on the flow side of the cylinder so the cylinder skirt doesnt cause turbulence...

Turbulence is a power robber,,,,Velocity is what you need to make power.....

Seems to me this thing has been ridden hard with that exhaust leak hole and put away wet without very much love.....

What you really need to do is start off with a brand new fresh cylinder with brand new piston...……….

Good Luck

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Last edited by CAM2; 2 Weeks Ago at 07:00 PM.
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