Gilera dna 50cc running rich throttle dying

[dna50]

i let my dna 50 warm up and its fine on the stand reving up and everything but when i take it off the stand and try move off the throttle dies straight away. when i take the plug out its showing its running rich can anyone help
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hsaeed

[Syris the Indomitable]

There could be a number of reasons for this, the worst being a loss of power due to needing new piston rings or kit ECT.
The exhaust or port may need a decoke, gearing CV belt system could be knackered.

What colour is the spark plud?
If a light colour your running lean, if black your running rich, ir brown or even darkish brown your running ok.

It does sound like a power issue, you may just need to take the carb off and give the jets a good clean without messing with the mixture screws.
Clean the plug with wet and dry, replace along with the cleaned carb and try again.
If no luck adjust mixture screw.

By the way, you can increase pilot jet from 36 to 38 main jet 74 to 76 on these.
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In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[dna50]

the plug was brownish iv just replaced the piston and rings its not losing power the throttle just dies on standstill when you try take off on it but its fine when its on the stand it will rev right up its like theres not enough fuel getting through while the bikes under load
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hsaeed

[Syris the Indomitable]

Sounds like carb needs cleaning then, especially the jets.

One other thing though!
Not familiar with these bikes but I know some side stands have switches which cut the engine off if you try to ride away with the side stand down.(Or to that effect)

My intuition tells me that this may apply to the center stands on scooters too.
So just wondering if there is a safety device which cuts the engine or transmition when the scooter is in the center stand possition.
This could be faulty.!!!

But anyway give the carb a good clean, float chamber/needle valve and jets.
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In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[N cee thirty]

that guys a idiot ^^

check your air filter's not blocked and get a new plug
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[dna50]

i havent got a side stand only a main centre stand but it doesnt have a switch or anything on it. thanks ill clean the carb and see if it sorts it cheers
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hsaeed

[dna50]

lol i got a new plug in there already but ill check the air filter aswell thanks mate
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hsaeed

[dna50]

lol i got a new plug in there already but ill check the air filter aswell thanks mate
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hsaeed

[Syris the Indomitable]

Don't listen to this dood he's lost the plot and appears to be smearing peoples posts.
https://img843.imageshack.us/img843/3706/2880686864d2cf0185571c.jpg

Stick with me kid and you'll be fine.

He's turned into a troll and joined the dark side, just give the carb a good clean, float chamber, needle valve and jets

https://img204.imageshack.us/img204/7105/chimpanzeelaughing.gif
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In Greek mythology Ichor is what immortals have in the place of blood
Those that mind, don't matter...Those that matter, don't mind. Do you agree with this?

[bikersupermot...]

hey dna50 - i totally agree with the thinker on this one ...

ull be able to tell the folks on here who are trying to be helpful by the language they use and not slagging off other people!

back to your prob ... - this has happened to someone i know that had the aprilia rx50 ...

air was getting into the cylinder between the carb and the engine - giving a weak mixture and spluttering problems ...

it was hard to find this - but carb off, check seals and that its bolted on tight. good luck!
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tinybikes

[dna50]

thanks yeah i will thats what my dnas doing it just bogs right down il give the carb a clean and check my airfilter. how did the problem with the aprilia rx50 get solved?
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hsaeed

[Joshzat]

I have the same problem with my DNA, it bogs down when reaching 15-20 mph. ive cleaned the jets and carb, changed the exhaust, clutch and variator. Im so confused, any other suggestions would be great.

Top tip - dont buy a bike off eBay

[dna50]

mine doesnt even even drive it just splutters on the spot and the throttle dies down im gonna make sure theres no air getting in my engine. is your air filter box secure make sure theres a metal clip sealing it up and check to make sure ur air filters not blocked thats what im gonna do if no luck then the pulley on the fuel pump may need re adjusting thats what my local garage told me. check ur plastic manifold that no airs getting sucked in thru there as it may not be sealed up properly
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hsaeed

[c_dug]

If their was air getting in between the carb and the cylinder the revs would be picking up not dying.

Rob was right about the idiot.

Check the filter isn't blocked, if it is running rich then it is not a problem with the jets, that would cause it to run lean and leave your sparkplug looking a whitish colour, if it is looking dark brown/black then you are getting too high a fuel to air ratio.

Possible carb problems could be a leaking jet possibly, I would be more inclined to check the air filter first though.

The DNA that bogs down at 15-20 is probably a different issue. Is it standard or have you stuck a bunch of tarty parts on it and not set it up correctly? Most issues with scooters not accelerating seem to start with somebody sticking a "racing" exhaust on their moped.
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Joshzat]

Every thing is totally standard as far as I'm aware, 56 main jet, and 32 for the other jet, have cleaned out the jets with an airline, and the carb. As I say the exhaust is standard, even tried with it off, I f I remember it ran worse (lack of backpressure) I think. Tried the clutch and variator, replaced the HT leads. Tried the airbox. I initially thought it was the clutch and variator as it seemed to be as it was ready to gear it's self. My latest theory after calling up a few dealers is what 2 stroke oil it runs on, they said it might be too rich for the bike, I've tried using a pre mix in a pop bottle to the carb by taking off the autolube and fuel feed, still no luck. I appreciate all your replies thanks