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Other question , in the attach picture is a hose marked by me in red , from that hose stream a brown substance with a foam which looks like cappuccino foam , it doesn't stream much just what is in that hose , it is normal that ?

Instead of buying a bigger jet or blocking your air intake (which is simply bad practice and is like choking the motor) just lift your needle a little.

i want to block the air intake just to see if thats the speed problem. what needle are you talking about? the main jet ?

i am curious how I can block my air filter  to see if it works in my case .

..you really need to increase the main jet size...if you're blocking half of the air flow into the carb to make it run better, then your mixture is probably very lean, and you stand to damage your piston...

when you say blocking half of the air flow into the carb you refer at a small screw on the carb ? the one which needs to be at 2 and a half revolution?

hello, i put in my agility R16 the main jet K82 as office manual. but at 55km/h it don't go over. But, if i close half of air hole (behind air filter) it goes up to 65km/h. is there any method to set the air without increase main jet?
thank you

I have same problem with those 55km\h but what does it mean "if i close half of air hole (behind air filter)" i would like to try it and see if speed increase ,but i don't know what franx want to say

I don't think it's to small beacouse it's the original one but i don't know it seems to be to tight, when i find a foto cam i wil take a picture or a video to see ,i've beraly move 2 mm up or down .

I've readed here on forum about iridium spark plug ,it works on stock scoot with no problem ?

Other question if you guys don't mind , wordslinger from what i read on forum you changed air filter and for what I understand you have to change the main jet to ... the question is with how much increasd gasoline consumption ?

Thanks wordslinger 5 gr it will be than .
an other thing , on flat road when reached 55 -56 km \ h i still have 2 or 4 mm to handle and hear the engine rpm increasing but the speed remains on 55-56, just when i go down a slope barely catch 60 ...

Hello , in first place i will apologize for my english .I am the owner of an agility 50 2007 ,it was derestrict and in first years it seems to be prety fast ,now it don't exceed 55 km \h on flat roud and 60 km\h in slope . The scooter is stock i didn't change anything outside of motor oil and air filter .I have done with scoot 14000 km .I want to know from you guys what is (or was ) your top speed with the stock scoot and tell me if i should go with him to review service or you could tell me what to check on him (i've downloaded from here the service manual ) . thanks and i'm waiting for your opinion