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Post by mikeboogie on Apr 17, 2020 8:06:47 GMT -5
Hello all I recently bought my first scooter it's a 50cc taotao thunder 50 I'm gonna get someone to install a BBK and a couple other things. I came across a video of someone with the same scooter he listed the parts he used. Can someone please take a look at the parts and tell me if this is all i need to do a good BBK install and if i need anything else please tell me. I have a 50cc taotao thunder 50 are the parts below compatible with my scooter? thanks so much for any help... amzn.to/34GbboDamzn.to/3bk4jzyamzn.to/2RLySGOamzn.to/3af6TWu
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larryhobman
Scoot Enthusiast
Posts: 117
Location: Delaware beaches
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Post by larryhobman on Apr 17, 2020 12:47:18 GMT -5
That is not a true 20mm carb. stick with stock but change your jets. start with a 90 or 95
Piston kit is okay check that you have a short case. 10" tire is a short case. 12" is a long case
That digital speedo is just like the one I returned. Did not do 1 cylinder motors like it says. only 2 or 4 cylinder. also was hard to calibrate for small scooter tires.
The belt you selected is for a long case. check your case size before ordering.
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Post by Kenho21 on Apr 17, 2020 14:41:35 GMT -5
I agree with everything Larry said. Figure out which carb you have and get the appropriate jets.
I’m not super well versed in 4T stuff, so maybe someone else can chime in, but isn’t necessary to “upgrade” the cam as well when going to such a large bore on a 4T?
In a previous experience I had with a 4T, I wish I would’ve either bought a different scooter for more speed or been content with a little less performance on the 4T I had. Doing such a large (50cc-110cc) cylinder swap ended up costing me a couple grand in parts for something that was damn near impossible to get tuned and made to be reliable. I recently wanted a fast and reliable 4T, so I bought a Kymco 163cc lol. Not going down that rabbit hole again. Don’t ask me about my Zuma...
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Post by fugaziiv on Apr 17, 2020 15:25:48 GMT -5
FWIW, he's probably going to need to buy a new carb because the factory carbs on most of these bikes are sealed/junk and won't be viable.
Matt
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Apr 17, 2020 16:03:13 GMT -5
I love my 4t's, but you're asking for trouble.
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Post by Zino on Apr 17, 2020 17:26:41 GMT -5
Like Kenho said 4 strokes are alot more expensive to upgrade .
Invest 300 bucks on a 2 stroke will get you breaking 45mph with a good Pipe a rejetted carb and a upgraded variator
Invest another 500 bucks in a bbk kit & gears, carb upgrade and you push 55 mph.
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Post by mikeboogie on Apr 18, 2020 20:14:35 GMT -5
I asked a friend and he told me to buy this. amzn.to/2Vjh6g7amzn.to/3eDLhqfwould this be ok or do I need anything else for my 50cc taotao thunder 50? Can someone suggest a digital speedo thank you all for the help.. If I buy those will it give my scooter a little more torque and speed? I know it's not gonna be a huge difference but will there be a difference?
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larryhobman
Scoot Enthusiast
Posts: 117
Location: Delaware beaches
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Post by larryhobman on Apr 18, 2020 21:30:54 GMT -5
Is your carb sealed that you keep looking for a new one? Does your current carb work well? You need to decide if you want a 50mm or a 47mm. For a new builder I might say the 47mm is best. I have installed both sizes and I am going with a 52mm on my next build, a Kymco that I should have soon if this virus crap get done.
I say to just get the 47mm kits and a jet kit. Look at air box mods or order a pod filter. Look up the free ignition mod on this site too. Get a set of sliders. After these are the way you like then look into springs, 1k contra and 1k clutch to start.
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Post by Kenho21 on Apr 19, 2020 0:41:38 GMT -5
I asked a friend and he told me to buy this. amzn.to/2Vjh6g7amzn.to/3eDLhqfwould this be ok or do I need anything else for my 50cc taotao thunder 50? Can someone suggest a digital speedo thank you all for the help.. If I buy those will it give my scooter a little more torque and speed? I know it's not gonna be a huge difference but will there be a difference? I don’t think that carb is any different than a stock carb, unless yours is sealed.
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Post by mikeboogie on Apr 19, 2020 12:36:41 GMT -5
Yeah my carb is sealed the carb suggested by my friend is basically the same carb but with the jets upgraded...
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Post by tortoise2 on Apr 19, 2020 13:17:47 GMT -5
recently bought my first scooter it's a 50cc taotao thunder 50 Accept your slacker mistake! Replace with a 150cc scooter, get insurance, pass the motorcycle written exam, and drive around a few cones for the practical . . or take a Basic Rider Course. BBK installation typically leads to the ongoing aggravation of experiencing one reliability issue after another . . then eventual bearing failure!
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Post by fugaziiv on Apr 20, 2020 7:59:15 GMT -5
Yeah my carb is sealed the carb suggested by my friend is basically the same carb but with the jets upgraded... Okay, here's the real question. How fast do you realistically want to go? Matt
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larryhobman
Scoot Enthusiast
Posts: 117
Location: Delaware beaches
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Post by larryhobman on Apr 20, 2020 8:43:46 GMT -5
Yes if you are only looking for speed but want a scoot then buy a large one 650cc. Do not bother with a 150cc you still have to pay the same insurance. I fool with the 49's for fun hobby and not for real speed. Where I live, if you are not doing 60 or more you will be run over.
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roon
Scoot Junior
Posts: 5
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Post by roon on Apr 20, 2020 9:17:31 GMT -5
In my poor man's opinion, bang for the buck you can't beat the $25-$35 Amazon 47mm kit with the stock head and carb. This is not going to get you a reliable 50mph, but not much will without spending more cash than your bike is worth. Figure out what your expected result is and search to see what others have done to accomplish those goals. As others have said, if you are trying to pass cars on the interstate, a 139qmb is not the best place to start.
If you do go with a simple 44 or 47mm BBK, you will see an increase in torque to get you up going quicker but top speed will ultimately be limited by gearing. You can unseal your stock carb, there is info on this forum on how to do so. You can tune your CVT to match the new power curve. I rarely find it necessary to re-jet much from stock as long as you are using the stock airbox, a mixture adjustment at idle usually does it for me but YMMV. A set of jets to tune with is much cheaper than a new carburetor.
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Post by GrumpyUnk on Apr 21, 2020 8:17:19 GMT -5
The 47mm bbk will add some torque, so you can accelerate from a stop better and climb hills a bit better without slowing down as much. The carb you listed is a bit larger than stock, so should feed the 47mm decently. I don't think you will have to meddle with the jetting if you leave the stock air filter & box in place. You can remove the internal tube just 'after' the external feed to the filter box without problem, and it may allow airflow a bit more freely. Unless you are into tuning and tuning and tuning to get that last bit of power, doing the above should leave you with a bit more power for hill climbing and acceleration. Your top speed may increase a bit, but you should note that your engine will be turning rpms in the 8000-9000 rpm range the faster you go. Its longevity will likely be decreased from stock as it doesn't have enough power to turn those rpms as readily. I bought a Glixal bbk several years ago, and was pleased with its fit/finish, and it seemed to work well after installation. I am pretty sure Glixal and Goofit are the two largest amazon scooter parts dealers, and I think both are on aliexpress also. Their shipping from the Far East makes local purchase reasonable. You may get lower cost parts from the aliexpress dealers, but will wait. I have bought from this company, which is local(GA): www.ebay.com/itm/50CC-to-90CC-SCOOTER-MOPED-GY6-CARBURETOR-CARB-SUNL-ROKETA-JCL-/272504002390?hash=item3f72811756tom
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