Everything on your s8 is the same as any of the 2t 50cc in principle. Look thru any of the posts, and you will find a wealth of info. When you understand how it all works from reading them you can ask for suppliers/links depending on what skill level you have, and the results you expect from your scoot. I read back alot, and find new info everytime. My point is there are different ways to achieve your goal, and the old threads have sooooo much info it seems to be a waste of typing if it is not looked at. The MANY opinions/facts/links are all here. So going thru them will be a time consuming process, but you can take the many replies to hone in on what makes you comfy vs. a single thread! Cool?