I have 5 bikes, 3 of them I ride 1 my 240 son rides (1995 DR650SE) and a dr200 my 140lbs wife ride. My mountain carver is a 2005 Suzuki Bandit 1200S. I have been riding this bike since 06 and love it. It will take me through a 15 mph curve with my knee down at 60 mph trail breaking and never lose the line I entered into the curve on. When i started riding I didn't understand the importance of having a properly sprung bike. But after some hairy moments and some close calls I decided I had better get some professional help before I kill myself or someone else so I talked to the owner of my local Suzuki shop and turns out he used to race in WERA and he is a very good rider. He asked me several questions like when I turn the bike in does it stay on the line, does the rear fell like its planted and a few other questions, he looked at the tires and notice the front tire was cupping bad,he asked how much tire pressure I put in them and he made a subjection that change my life for every and that was "put some money in your suspension". Here I was think the suspension was good enough for a 170lbs rider with gear on and it was if I was going to ride through a 15 mph curves at 30 mph. So I took his advice and did a low budget suspension upgrade a Hayabusa rear shock $50.00 off ebay because it's a direct bolt on and has multiple adjustments and the Busa only weighs 60lbs more then the Bandit. Gold valves from Cogen's (Rick for give me if I didn't speed it correctly) 15 weight fork oil and I went through 3 sets of fork springs before settling on a set of springs normally used on the track. When I do a day ride on this bike i ride a 400 mile loop and i never fill beat up from the ride sometimes I will do a 2 day ride that's 800 or more miles in 2 days riding hard. Now DR350S I also ride and ride it hard both on the road and off. Here we go,,,,I am not happy with the street handling so what do I do. I change the fork valves, oil and springs rebuilt the rear shock only and went with a heavier oil because like I said I only weigh a 170lbs with gear on good day sometimes. So i ride it a few times and realize the front is to firm off road so I put just one of the stock springs in perfect! But the bike is still a little squirrelly on pavement in the corners at high speeds so what could the problem be guest what,,,I over looked the tires! 80/20 and I ride more aggressively on the pavement than off road so i went to a 50/50 tire and now I drag the foot pegs through the curves. I am not sure if you will ever get yours to handle as good as you want due to the small chassis and lack of after market parts for the 350 Tractor. I wouldn't try to do it for my 240 pound son that's why I bought him the DR650 the chassis is capable of supporting someone of his size. I hope my experience helps.