Hey there guys, just bought my first 250R (88') with some work done to it. They actually took a pilot 400 motor and bored it out to a 436 runing 110 octane. I am not a huge fan of that, but i bought it and would like to fix it up and change some things on it. What is the best way to adjust the bike to run more of 98-100 octane. I mainly want a bike that I can take to the dunes and have fun with that runs good. Any ideas would be great. Also what are some of the best sites to find parts? I need to get a new silencer and pipe possibly, some other parts like like headlight stuff, chain guides & Rollers, and a thumb throttle to replace the twist (not fond of the twist throttle yet). Any suggestions would be greatly appreciated.