Speedometer ratio

[supersporttdi]

Does anyone know what the speedometer ratio is for a 1980 Yamaha SR250? I can't seem to find it anywhere. 1:1, 2:1, 2240:60
I'm leaning towards the 2240:60
IDEAS?

 

[Big R]

Should be 2240:60. To my knowledge, 2:1 and 1:1 ratios are for Harley.

 

[supersporttdi]

Isn't the 2240:60 pretty much standard for Japanese bikes in general? I just don't want to drop 100 bucks on a speedo to find its not accurate.