Who has the fastest 50cc bbk scoot?  By  thebeerguy (Read 8,782 times)

You will have to get a piece of radiator hose to connect the carb to the manifold. My 32 mm is a tight fit but after some adjustments it does just fit.

ya a lot of ppl have told me that. I am new relativly new to scooters and an willing to learn the hard way. i havent taken the carb apart so idk what jets are in it. it came with a way bigger than stock intake. and to be honest i kind of want to stay away from the uni filters, they sound like a pain needing to be oiled all the time. ill buy a way bigger open air filter before i try a uni. (again learning the hard way probs). I have the valves set to .004 in and .005 exhasut btw. oh and the kit i bought came with big head valves.

www.scrappydogscooters.com/139QMB_50cc_Performance.html

i got the stage IV performance kit minus the exhaust. check it out give some more feedback i love all the info im getting form u guys!!

wow my mistake 24mm carb lmfao

Guys quit fooling around and just slap one of these in there
Alleyoop

ive ran the 24mm several times it works great, i run it with the 150cc manifold no spacer works and works well but pacmans gas

mwlehman wow hers out runs your Aprilia Is yours stock and in tune ? EFI or a carb ?

MillSC had a custom ported big valve head with a unrestricted exhaust , UNI and gears which allows him to use the 150 carb where a stock head , exhaust and airbox it would to big and not have enough flow to get the most out of it .

I had a TaoTao ATMa " secret 63 " and it would zip pretty good . I did go from 8 grams to 5 gram rollers since it is very hilly here as the area is called " The Fooothills " since I an below the Blue Ridge Mountains . I blew it up and got an Air Sal kit that I was suggested to right when I first joined the other site . I have had 40 or more two wheelers since I was 13 and I had the bug real bad and was sick of putting 80 a week in gas in a van . With the 50mm BBK I did use a 96 main jet with two washers to raise up the needle since no clip . Takeoff and uphill was a huge noticeable diff but top end was the same and I could do it with less throttle once it got up to speed . I sold it to a friend of a friend who had a scooter that he fried the engine . He was a new first time dad and needed a scooter to get to his two jobs . I let him take a test ride and he had the cash in his hand before he could stop . He was amazed at how much stronger my scooter was than his . So far only a belt break and I saw him a few months ago still riding it .I had a guy on Peace VIP 150 want to race me at a traffic light I walked off and left him on takeoff and it took him over a quarter of a mile to catch up and barely outrun me . I weigh 200lbs and he was maybe 130 .

My Jonway Magnum which is 2T with Minarelli engine with the 68 main jet replaced with a 75 would do 45 all day and hit a 50 and 50 plus ( according to the speedo ) with 13s . The exhaust port is D shaped rather than O so it restricted the engine to maxing at 8k RPMS . Even with a the blue racing CDI same top end and rev limit but a better midrange with advanced timing . A lil head porting and up jetting Im sure it would easily do a GPSed 50 + . With a 47mm or 70cc BBK , upjet , Uni and HP pipe it now screams up to 10,500 , take off was less since the unrestricted pipe does build up back pressure , but midrange and top end are a hoot . It came with 6g rollers I tried 4g but they where too light and lost top end by 4 MPH or so so I mixed then to equal 5 and liked it . With the BBK at 50 MPH ( speedo ) and 9k RPMs I could let up then hit WOT and with a lil effort pop a wheelie for a few feet . I got 8g sliders to cut down on it screaming but it only slowed my take off even 1.5k clutch springs added at the same time with a Hoca BB torque spring base . I can hit 50 MPH up a very large steep hill with a running start hitting 9k . I can cruise from 8k to 9k with barely any throttle and its no fun down hill as it over revs . Weird its not geared low and has a fast takeoff like a buddies Elite which is quick at first to 20 then looses its ump . When mine was still a 50 I installed a Uni vent cover which is smaller than the big red air filter and went with a main jet and it was faster on takeoff , a hair louder with more air intake , way more power in midrange but still topped the same . What is funny and true is I broke the speedo cable on the 2nd day so when asked how fast it was I said " It only registers 50 MPH " but the cable broke . It broke when I was taking off rather than maxing it out . I will have to get a gear set once I do a teeth count as it is like Pac Man on the gas . Stock 50 it could do 40 up many hills with a running start .

A buddy just bought a TaoTao Thunder which looks cool with modern designed body , LED strips around the two headlights , an arch of LEDs for the tail light and dual rear shocks where many are single . I got to ride it with only 16 miles on it and man it was sloooooow since it is stock out of the crate , where my scooter dealer makes a few mods like upjet , lighter rollers and a Gates belt . My Motobecane with pedals was faster except uphill since it had a single speed chain drive instead of a CVT . Tuning the CVT really helps improve performance . I rode it around and when I cracked the piston ( a hairline crack ) my ATM would still out run it and when mine was new I would do 15 to 20 MPH faster . My dealer said almost all of the TaoTao and Peace Sports out of the crate needed the valves adjusted as he said perhaps his should too as it is so wimpy it is not safe beyond the neighborhood . I told him about the Air Sal so soon we will get it to go faster .

I had a Honda Elite 2T stock and it would hit 35 maybe 38 . I bought a rich kids Honda Spree that he wrecked the front end for a mere 100 bucks . He dad was mad since he yelled out he spent over 300 on it in upgrades in 1989 dollars . I replaced the broke forks and a new tire on the front , cleaned the airfilter , put in a NGK iridium , and changed the gear lube . I never did anything else but put in gas and and ride it . From a dead stop below a tall and steep hill I hit 35 MPH with me , a smaller buddy and his lil brother on it at the same time . I would bury the 50 MPH with ease and it was not screaming or anywhere as loud as my Magnum . I never had an issue and I rode it like I stole as any other 17 year old would . The Spree was also the very first scooter I ever rode . I was used to pedal mopeds , a Honda Express and an Urban Express and dirt and street motorcycles . I loved that scooter so much that I cried after I sold it . With only the two Honda scooters to use as a database and several brands of pedal mopeds I wanted a scooter to play around and ride short distances . Well I learned the China scooters are no where close to being as good as my Hondas with the TaoTao cracking the piston on the 2nd day and exploding 6 weeks later . I have never in my life had a piston problem or had any idea that it was a common bug in China scooters more so if modded and the jetting is lean .

I bought the Magnum after selling my TaoTao as all of my 49cc street toys were 2T and I missed the peppy response and wang yang 2T exhaust sound . I loved how my Magnum has large 130/60/13s ( doughnuts ) which rode and handled eons better than the TaoTao with 10x3.5 tires . I was really impress that it has F&R disc brakes ( super rare on a 50 and many 150s ) with the rear having dual opposed pistons in the caliper instead of 2 side by side like on the front . I had my dealer follow me home in his truck to deliver it for me . I rode it around the block after filling up the oil tank . I liked it so much I rode it to another county around 22 miles away instead of taking my Echarm . I had so much fun that I saw the needle was on E and thought I could make it to a gas station in time since many are not 100% . Well it was and bzzzzzzzzzzz it ran out of gas . I was so happy from riding that it did not get me down and was a half mile push . Filled up and was smiling again . It has a street knobby so it has a lil bounce and reminds me of the old school minibikes . So stable I can ride with no hands even in a turn . The TaoTao has had me more nervous at top speed ( 55+ speedo ) than when I hit 160 MPH on a Hurricane 1000 ( later renamed CBR ) as the short tires and wheel base was fast to maneuver in turns but not stable .

Modding is fun and with a lil effort you get more out of it . Modding extreme plan on parts breaking and wearing out as most use street not high end racing quality parts like the Italian goodies . If you buy everything under the Sun a small engine can only do so much . To me IMO a real scooter experience is on a 2T like the old Vespas with fat tires . The Echarms 16s feel like a cross over from scooter to a motorcycle and rides great up to a true 60 MPH where it starts to get sketchy and more so at 75 MPH where my Magnum is stable at any speed even in strong gales .

If you want a hot rod 50 I would suggest get a 2T ( 2 stroke ) since they are faster , easier to tune and repair since less parts . They are almost all gone unless you can afford an Aprilia SR50 or find a used one to be a project

Don't count me out, I'm closing in on millsc's speeds only 8 mph more to go.....LOL all in fun