Right just read the description and saw that by adding 20cc you get 65+. No. You've made the cylander bigger but kept the original exhaust which like a ribena straw. So unless your speedo is out then this will probs do 50mph. Downhill with the wind on your bike.

 Hi there. considering i don't have a speedo on the bike at the moment and i was following my dad who at the time was riding at the time, the exhaust has no holes in it what so ever as i am a welder fabricator by trade and made sure that there wasn't any leakage. the bike has a 48mm performance piston as well as a larger carbourettor.. you are more than welcome to come and watch me if you like. i would be happy to prove you wrong kind regards Zak

 zak if i have sex with you can i have this bike?

 blowey and 800 ? hahhaha