I've got a 86 xr600r. has been idle for 6 yrs. less than 5000 mi. or so. i had it in az. for the desert, now i'am in wi. i have been getting it back in shape and have it licensed. it still has all kinds of power. dual 28mm carbs. i opened up the air box, had it re-jetted . wraped the headers to keep it a little cooler and took out the arrestor. aside from that it is stock. i plan on keeping this bike forever and ever, something fun to work on. the next thing i would like is exhuast, any suggestions? eventually i would like to bore it maybe even high comp. piston. but i almost go flying when it kicks back as it is, i only weigh 150 lbs. it scares me to think how it would be with engine mods. any suggestions?