information please

hi could anybody help me! i am doing up a st70 1976 at the minute, it running 17 teeth sprocket at front and 32 teeth at rear. whats the best set up for the bike, when it was running it would only do about 34mph and wear can i get sprockets and chains from. thanks lee

Not sure what's the best place is in the UK to buy your parts.
Other members will know lots more about this.

To calculate your speed, THIS link could be helpfull.

34mph is too slow for an ST70 engine.
17 - 32 sprockets are a bit too heavy, try 15-32 or something. (1 teeth equals 3 at the back, so 15-32 is more or less the same as 17-38)
But I assume that there's something wrong wit the engine as well, because it should accelerate very slow but achieve a high top speed with these sprockets.
I'm thinking about ignition / cam timing...

hi thanks waynus for your info i will try that sprocket set up and check valve timing thanks for your help. lee