I've just finished rebuilding my PK50XL(2?) (V5X3T) engine. I've installed 75DR F1 kit, 3.72 ratio up-gear kit, and new 1616 carburetor.
1. What jet sizes should I use for optimal performance? I will ride about 70% outside the city + 30% city
2. Should I change the exhaust or keep the original?
3. what's the best timing and spark plug for my setup?