MikeG
VIP MEMBER
- Joined
- May 31, 2012
- Messages
- 1,353

How do you know if you have the correct ratio speedo drive? The one from my Commando is marked BG5330/164 Ratio 1.251. I think this is a repro but not sure, and my speedo has always read fast. Looking at Old Britts site I see several different ratios. My bike is a 71 Roadster with the stock 19 inch rear rim and speedo head.