FloridaRider

Thank you. I was thinking the tires on the bike when I got it were the originals (very bad shape), so I'm going with 2.5-18 and 2.75-18 Bob

I recently acquired a 1976 RS 100C with less than 5K miles. It doesn't need much attention, but I want to replace the tires. The bike came with a 2.5-18/front and 2.75-18/rear. The Owner's Manual says these were the proper tires, but my Haynes Workshop Manual says 2.75-18/front and 3.00-18/rear. Can anyone tell me which is correct and/or recommended. I'd like to stay as close to "original" as possible. Thanks, Bob

Thanks Blackhat. I have the green one.

Purchased my first Yamaha: 1976 RS100C. The bike is in very good condition and I don't plan on a major restoration effort. I've rebuilt the carb and replaced a few items, but it is running. My next project is to replace the tires. The bike came with a 2.5-18/front and 2.75-18/rear. The Owner's Manual says these were the proper tires, but my Haynes Workshop Manual says 2.75-18/front and 3.00-18/rear. Can anyone tell me which is correct and/or recommended. Thanks, Bob