How to speed up bicycle

The cheapest ways to go faster are to get high pressure tires -120 or even 140 psi - and keep them at high pressure. Make sure you have street tires. Knobbies will slow you down. Make sure your wheels spin freely. If the hubs are jammed, or the brakes drag, that will slow you down. Bigger rings up front and smaller cogs in the back. Technology has changed greatly since the 80's bikes are much lighter, new aluminum road bikes will help to increase your speed a lot. Start training yourself.