MOPED ARMY

Ive resently bought a rear 20 tooth sprocket from heeters.com,since thats the only place to get one on the internat for $19.95.I owne a 2003 tomos sprint with an a35 engine.ive bought it from a guy for $800,it only had 90 miles on it. Ive put more than 2000 miles on it ,its a blast to drive. I was wondering on how to get the front sprocket off and what tool(s) I need to accomplish the job?Thats the only thing ive done to it yet,except the minor maintance and the accasonal flat tire.The last time I drove it I was at a top speed of 34 mph, which is not bad concedering I weight 195,but i would like to see a little more top speed out of it.With the rear sprocket change from a 22 tooth to a 20 tooth what should I see with as far as top speed goes?When the rear sprocket gets here I will let you all know my top speed ,hopefully it will incress.After I get the sprockets set for speed (do you have any ideas what set sprockets I should get for top end)im going for a bi-turbo exhaust and an arsail 70cc speed kit if any body has any suggestion to perfect a tomos sprint a35 let me know including what jets i should be ruiningwith all this set up . I thank you fellow mopad riders for your input!If you want to drop a line or just chat bout mopads or just share mopad stories jonlafave@yahoo.com (Jon 23 from va out! )