I'm looking at getting a bike to train on and have some fun with on weekends where I cant get out to the big tracks. I currently have an 09 R6 that I used for full size tracks. I am looking into either an 85, or a 450 sumo to use at kart tracks. I am in Socal so I will probably just be going to Apex/Adams/Grange. There is a kx85 for sale locally that I can get for about $2k. Original motor, "low hours", 17s, slicks but looks to be decently well built and cared for. I've also been looking at 450s and I think i would need to spend about $4k for one(KTM SMR 450 for $3750 at a local dealer). From anyone whos ridden both, what would you recommend? I dont exactly have a ton of money to spend, so I may need to wait a bit longer to get a 450, but if its worth it I wouldn't mind waiting. I could get the 85 pretty much immediately. I'm 5'11, but from my research I think I should fit decently on the 85. Thanks!