Big Bore kit

[Dale4]

  Hi, I'm looking to upgrade my Agility 50 with a 70cc big bore kit. Is it as simple a installing the kit or do I need to do other things also like upjet the carb,open air filter,etc? I'm hoping all I need to do is install the kit,I'm just looking to go a bit faster. Thank you for the responses  Dale

[spr0k3t]

Generally speaking, any time you make a change to the engine, you are going to need to make an equal change to the carb and possibly airflow.  It could be something quite simple and require nothing extra; however I have never done a BBore kit on a 50cc.  Since you will have the engine out, upjetting would very easily done.

[glopezz05]

I did a 72cc ncy kit on my agility50. Yeah, I needed a bigger jet. Go with an open air filter to help get more air to your bigger combustion chamber.  You'll get about 5-8 mph increase with better aceleration and hold speed on hills better as well.

I have a video on the forum somewhere of it.

[glopezz05]

http://www.kymcoforum.com/index.php?topic=3104.0

[alpha300]

How did the scooter and the rest of the engine hold up to to the extra 20cc?

How long did you ride it in that configuration?

[glopezz05]

Rode fine. Had it for a month before I sold it and got an s8 150. I might have stayed with the scooter but the roads around my home are hilly and have a 45mph limit. I needed a bigger scooter to stay safely with traffic. I miss it. I liked modding it out.