How can i make my chinese trial 125 faster?

hey i have a Dirt pro gy 125 trial bike in my collection and i have decided to get it out of the shed for a race next weekend across the moors for a laugh, the race is partly on road but mostly off so i will be keeping the off road tyres on but the guy i am racing has a slighter faster chinese trials bike (lifan 125) so what is everything i can do to make my bike go faster? it only has to last about 20 miles.