Thought I would share my build with others.
I have a peugeot 103 sp 1979 variated. I wanted more torque to get me up hills ect especially as I am 227 lbs ish.
Top speed was about 35 before the changes and hills were slow, very slow.
Here is my adjustments to get me to 45mph and so much more torque. Hills are now a breeze.
3 balls in clutch 2 springs
Mbk cdi kit £80 pounds
Original gurtner carb, 2 10mm holes drilled in air box upjetted with a number 75 jet no cost for jet as used micro drill to widen an original jet.
Polini Reed £15
3rd port dremeled out
46mm ali express airsal t3 kit cylinder and matching head £75 pounds delivered, not sure if this is a genuine airsal but if not its extremely good quality, all fit together with no leaks and no flaws in the materials. Looked everywhere for an airsal kit with a matching 46mm head with decompressor.
Simonini serpintine chrome exhaust £125 pounds delivered
13 front sprocket 48 rear sprocket
40;1 synthetic oil prefix
Head temps run at about 330f
Hope this helps someone. Simon Leigh UK (edited)