have owned a trx300 for many years that I use for pig hunting and gold prospecting in aussie outback but have developed electrical issue. Sometimes I must let the bike idle for a while before touching the throttle or it cuts out, sometimes turning the handle bars while reversing out of the shed, and sometimes wont fire at all. I have replaced both cdi boxes checked wiring and cant find the fault. All of a sudden it will come good. Any ideas maybe oil temp sender. When bike is hot no problem. thanks wayne