Christoffer Pritchett: You need to let it warm up for say 5 mins to make sure the
autochoke/enricher is warmed up. At that point, with the suspicion of an
unclogged carburetor and jets, you would want to adjust your fuel mixture
screw. Too far either way will make it bog. Find the center position. You
do want it to run on the rich side as it keeps the engine cooler. Quick
throttle turns while adjusting the screw will help you find the engines
happy place. It will be where the engine's idle is at the highest and
turning the throttle does not exhibit any bogging or choking. You may need
to do a few test runs under load to make sure you have it perfect. This
should all be done with a cleaned carb! With small engines atmospheric or
elevation changes greatly affect your carburetors performance. I would
retune the fuel/air mixture every 6 months as far as seasons are concerned.
Remember to reset the idle screw after tuning the mixture screw :) Always
use the highest octane gas that is offered!!!
Angel Sun: I have a 205cc briggs and Stratton OHV system with a belt drive, (1 belt)
from the motor to the rear tire. When I start the engine all is fine it
starts right up, but when I give it throttle to start moving i drives very
slow like 3 -5mph and it makes a squeeling sound I have to push the bike
along by kicking the ground like skatebording to get momentum when i do it
gets going better but incresed throttle makes squeeling sounds and the bike
never gets past like 10-15 mph it loses power. so I end up turning it of
and pushing it back home, do you have any ideas as to what is wrong this
has been hindering my progress for 6 months now
William Walters: I am having a problem like this. Basically it almost never starts and when
it does it is fine. If I don't hold the throttle open it seems to make a
grinding noise like it isn't getting enough cranking amps. I have taken it
to a scooter person and I told them it doesn't seem to want to start and I
wanted them to look over it and fix the issue. Also I wanted them to see if
they can give it a little more speed and ability to go up hills without
slowing down. Well they did that and it worked fine for awhile but
eventually stopped wanting to start after a few attempts. I really think it
may be the auto choke do you think this may be the issue as well?
abel berenguer: Hi Dios tks again four you all videos you been post, I have a Chinnes
scooter Sym Fiddle version 1 from 1999 my question is- is ok to use same
pipe size from the petcoke " vacuum pump" four the vacuum and petrol tank
you have a great Christmas and Happy new year four you and you family best
Goran Milanovski: I have an issue with my 80cc 4tact scooter, when im driving it it feels
like im changing gears, it doesent just go like you gave a full trotile and
go right? well its not it acelerates and for a second it stops and then
again acelerates its like a pause between start , middle and full gas , can
you help me with this one?
nathan hofschulte: 8000hp? holy crap
sam240se: your time for making this video is well appreciated. by the way i felt you
were talking to me cause my name is sam too. thanks for your help.
trevgoodchild: Cool video man, thanks for sharing.
mrfayetteville91: 8000hp Hemi? I dont get it
DIOSpeedDemon: @THe808KiNGX Sounds like you need a new drive belt and check your whole
drive belt system for a start.
G1LDZ: ..Which seemed until I knew where the oil was coming from wasn't much use,
so I go to investigate, looks like it's dripping from a little hole drilled
into the airbox, take off the cover and find oil in the bottom and on the
bottom of the air filter (but not that much) take off the whole air box and
the pipe that comes from carb has oil in it, and can see oil dripping from
the carb! checked out the internat again and can't seemed to find anything
on this so I'm stuck!!! PLEASE HELP DOISPEEDDEMON
crazydriverboy: When i rev my speedfight 2(50cc) it takes about 3 seconds for it to start
moving and it takes a while to but when it does reach 10mph the
acceleration speeds up by alot, i was thinking the clutch springs were too
hard and that they made the clutch engage at high RPM's but wouldnt that
increase the acceleration a bit quicker than when i reach 10 mph? the
scooter is restricted btw, please help!!
Kelly Burton: how do i fit fuel pipes on a piaggio zip 50 2t with a 19mm jog carburettor
please regards kelly
keyskennels: and i also have a 50cc chinese scooter. the motoer is brand new, but thw
starter pinion wont catch the drive face. it just spins. please help me out
xNOSKOP3: I have a piaggio Zip 2 Stroke and i had a problem where i had to hold the
throttle to keep it from cutting out and also wont go past 30mph i used to
get 55 my spark plug was dry and a mechanic said it should be wet from
petrol but im unsure if this is the problem or what the problem is im
unsure why it wont go past 30 i know i need new performance rollers but im
sure that isnt stopping the performance as it was fine before any
londonTown1989: these videos are amazing they help so much and i bet u have saved ppl so
much money thanks for sharing all these videos
DIOSpeedDemon: A racing variator will give you about 5 mph more speed and can be bought at
Vtcycles. check my home page for their website, thanks.
NucIearChrist: i have a chinese 49cc scooter. 4 storke
Robin Bigun: @DIOSpeedDemon I have the same problem! I will clean the jet! thanks
hammerhead042: What I'm going to check tomorrow is the cvt drive belt because I noticed
that some bolts were not all the way tight so I'm lead to believe it has
been tampered with before. If the belt or clutch is not the case does
anyone have any suggestions on what may cause that engine to scream out of
control and see no movement in the tire?
G1LDZ: PLEASE HELP!!! Oil coming out carb into air box on a 2 stroke!!! FULL
STORY..................... I just purchased a piaggio hexagon 180, was told
when I brought it that the autolube leaks but "not a problem because I've
just premixed since it did it last year" rode it back the 60miles and ran
lovely, next day pool of oil under bike dripping from air box, (Can't be
autolube!!!! How can autolube leak with no oil in it?) So not having much
mechanical know-how, I check out the Internet for Info....
DIOSpeedDemon: I cant hear anything on this video, sorry.
dammstr1991: as soon as i pour gas into my gas tank the gas starts pouring rite out what
can be the problem?
DIOSpeedDemon: @Sabbador Look around the head for any oil or gas leaks. This will show a
bad head gasket. It is imperative to change the head gasket after every
tear down. Go to a motorcycle shop, order a new gasket or three, for
spares, and change that used head gasket for starters. Get a new spark plug
while you are at it. SOunds like a blown head gasket to me. RH
delamsam2: my 70cc scooter engine cuts out when i twist the throttle more then half
way any idea what the problem could be ? thanks
Insanecoment: I need help! I have a Yamaha BWS Scooter, and when starts it and starts
drivin it leaks a lott of gass! I noticed this to day... I saw a stripe of
gass from where i was drivin... Pleas help!
gelgoorx: my honda 50 elite sr starts up great but i cant seem to get past 33 flat
road and 35 downhill plus the take off is slower than when i first got it
DIOSpeedDemon: a Maine turns on carburettor four the air screw ? How many turns the air
screw must go in? No more than 2- 2 and 1/2. Any more and you will have to
change your idle jet to the next largest size. THanks for the kind words.
Sabbador: @Sabbador (continueing my other comment) What do you think could be wrong?
Hope you can help. The carb should be working fine, but maybe it's the
menbrane again? It also as significant start problems. When kick starting i
need to kick 15 - 30 times lol. It's only a few years old and has run
mechaniczman64: TO: jalesj03 you might not have enough gas in your tank make sure your
choke iworking right when it starts to die unchoke it
jon phillips: what does mopped mean?
angel archilla: I have a Yamaha 50cc and I can hit top speed it will go up to 10mph the u
can hear it fail on me but if u keep on it u here a pop of air from the
DIOSpeedDemon: First you need to bring it to my house and let me Check It Out.. Seriously,
I have many videos on the subjects you ask. Thank you. RH
abel berenguer: You need to cleane your carburetor
mattsteam12: Hi. My 50cc 4 stroke is fine when its going along but when i stop it just
cuts out. Also if you blip the throttle then let go it still revs even
though i dont have my hand on the throttle. Do you know why? Cheers
Insanecoment: That have happand to me before... I dont know why but sudently it stopped
abel berenguer: Hi Mr. Dio tks 4 your great videos I like to see all your videos because is
amazing, just a question I have a Sym Fiddle version 1 from 1999 is two
stroke engine whit 75cc naraku cylinder, my question is - a Maine turns on
carburettor four the air screw tank you very much BERENGUER
Vain Batchelor: i have a vento zip. im loosing power going uphill and on semi grade hills
when the speed reaches 30 mph it takes off and cruzes fine . its just with
the lower end speeds. its a 2 stroke. it used to do fine . any help would b
DIOSpeedDemon: Sounds like a clogged main jet, which is very common from a bike that has
sit for a long time. Clean the jet and replace, then fire up. RH DSD
Bunks Medina: can you help me sir? i have idle problems too... my scooter wont stop... it
wont go idle at all.... the wheel just keeps on running.. what seems to be
Lewis Roper: i have a problem with my Aprilia SR50 R Factory. when i pull off it's
really slow and then picks up. i thought i could be the throttle cable but
now i think it's either the drive belt or the clutch. any ideas
Robert Kincaid: I have a Honda XR50R and after a crash, where it slid sideways across the
backyard, it started leaking oil at first, then straight gas from the air
filter box directly behind the carb. Any ideas what's wrong with it? And
how to fix?
THe808KiNGX: really need ur help i got a sym dd50 every time i start it and take it for
a ride while bulling back the throttle it goes faster and faster then bugs
out and starts to have lower acceleration can u help find whats wrong?
Matthew Poole: I have a 50cc V.I.P moped and i can crank it up but it will run for about 2
min and then cut off. by itself and then when i try to drive it i fully
throttle it then it slows down and cuts off i cant even get 20 feet. wht
the HECK is going on with it?
Mark Davis: My vento 150cc gy6 motor will not stay on. It run for 2 sec. then stop.
Could this be the carb jets?
meech78: A Hemi has 8 thousand horse power? (3:27)
josh hobson: i have a scooter it takes a wile to start but when it dose it only stays at
10mph then cuts out i have cleaned the carb and wd40 nearly every thing i
had a nasty shock from it the other day so it has the volts but its nt
using them please help
Roland Tingen: super mooi ik heb zelf yamaha aerox loopt weer mooi dankje
DIOSpeedDemon: I a glad to help and that is great you got it to work. Clogged jets are a
very common problem. RH DSD
sam macd: I have a Benzho 50 cc Scooter,When I start her up,she quit,s on me,,any one
out there know what it could be,Thank you.
2-50cc Scooter/Moped Carb Theory and Common Carb Problems4.7
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