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I am looking to upgrade my clutch main spring on my 50cc scooter and wanted to know if anyone can recommend a good clutch mainspring to upgrade too that will give me better acceleration but not affect my top speed. Also does anyone know what would be an optimal roller weight set up for a 50cc scooter as well?

Because there aren't any in driving distance from me. I went to five different places today and none of them had the right sizes or any polyurethane hoses either. So does the hoses i posted a link to work as a vac line as well?

Hey guys. I have a gy6 50cc 139qmb scooter and wanted some help replacing my fuel and vac lines. I can't figure out what diameter fuel or vac line I need though. I just have a standard carb too if that helps. So does anyone know what are the standard diameters that these carbs and engines use for fuel and vac lines? My fuel lines have some number and letters on them but i have been searching and so far none of that information has helped me find the propper lines. Any help would be much appreciated.

Is the hose with the blue zip tie the valve head vent hose? Also do you know the hose with the yellow zip tie is? It came sealed off with a black zip tie when i first bought it.

When i mentioned the T in the other comment that had to do with the metal box i think i might have poorly explained, but it is not going into that metal box near the exhaust. It is coming out of a tub in the air filter as you can see in the picture above. Also so you know I will not be using the airbox because I am just going to directly hook the new UNI filter straight into the carb.

No not coming off of that little metal box except for the connection to the exhaust pipe. But there is a T adaptor with some hoses going to it that i need help with. I just got another flashlight to make it so i can take a clear picture for you. Also what can i use to block off the metal box. I just need a way to plug up the larger metal nipple that hose with the blue zip tie is connected too. Any type of special putty or something that will be good for that?

Ok so i have two more problems with removing the stock air filter that I need help with. Here is the picture of the first problem. If you look at the connecter that has that little blue zip tie around it you will see to the right of the blue zip tie the connector is connected to the big tube that goes from the air filter to the carb. To the left of the blue zip tie the connector is connected to a hose that goes from the connector to a little metal contraption that connects right into the exhaust pipe. The problem I have is when i install the new UNI air filter the tube that goes from the old stock air filter into the carb that the side of the connector that is to the right of the blue zip tie is connected to will be gone and the connector will just be dangling. Am i supposed to just leave it disconnected from anything on the right side of the blue zip tie and only just have that hose that goes to the exhaust connected to the left side of the zip tie on the connector, or should i connect it someplace else now? I started the engine with the side of the connector to the right of the zip tie disconnected from the big tube that goes into the carb and the engine ran fine but it sounded a little hollow, so i put my finger over the opening of the connector on the right side of the zip tie to make a seal and it sounded and ran fine. So i think i just need to seal that hose off but i am not sure and that why is why i am asking you guys. So what should i do? I have one more problem that i will take another picture of in a little bit.