82Maxim

I am looking at these based on the below link: http://www.foreven.com/motorcycles/Tyres/YaSeca55.htm Let me know what you think. Any thoughts on the single exhaust?

I have had a 82 Yamaha Maxim XJ55O for about 15 years. It has 12,700 miles on it and it still runs great. I live in South Dakota so I am just now able to start riding this year. I am looking at replacing the rear tire (it's getting a little dry and cracked. I have the Dunlop Gold K127 130/90/16 and I plan to replace it with the Kenda K657 Sport Challenger 110/90H-18 from Tires Unlimited (http://tiresunlimited.com/default.htm). I am curious if anyone has an opinion about switching to this other tire size. How will it affect the ride? I am also looking at replacing the original dual exhaust with a 4 in 1 from Old Bike Barn (http://www.oldbikebarn.com/part.php?id=1452&subcategory=Exhaust%20Systems%20-%204%20into%201&bike=&DisplayPerPage=20). Any pros and cons to the dual versus the single exhaust on this bike? Thanks for your time.