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Ok, so I need some advice on gear ratio’s :hmmm:
My manual says my current gear ratio is 17:42. The other day I hit 187km/h with another 1000rpm till I hit the rev limiter in 6th. Now, as fun as that was, I am really not that into high speed, and would prefer to have a little bit more snap/ bottom end on my bike, so am considering changing the gear ratio. I figure the easiest thing for me to do is to drop a tooth or two off the front sprocket. Now what I need you help with is determining what sort of top speed loss I can expect by loosing 1 tooth up front, and what loss by loosing 2 teeth up front. I have already ordered a 15 tooth front sprocket, but a mate told me that 1 tooth down will result in 20% off the top end (sounds too much to me?) so by installing a 15 tooth sprocket, I will loose 40% top end?
So, how much top speed will two teeth down result in, and has anyone dropped teeth in the front and what was the result?
The way I worked it out was to take the top speed (187km/h) divide that by the number of teeth on the front sprocket (17) and times that by the new front sprocket teeth:
The results look like this:
(187/17 = 11) x 16 = 176km/h
(187/17 = 11) x 15 = 165km/h
Is this valid?
Thanks
Al
My manual says my current gear ratio is 17:42. The other day I hit 187km/h with another 1000rpm till I hit the rev limiter in 6th. Now, as fun as that was, I am really not that into high speed, and would prefer to have a little bit more snap/ bottom end on my bike, so am considering changing the gear ratio. I figure the easiest thing for me to do is to drop a tooth or two off the front sprocket. Now what I need you help with is determining what sort of top speed loss I can expect by loosing 1 tooth up front, and what loss by loosing 2 teeth up front. I have already ordered a 15 tooth front sprocket, but a mate told me that 1 tooth down will result in 20% off the top end (sounds too much to me?) so by installing a 15 tooth sprocket, I will loose 40% top end?
So, how much top speed will two teeth down result in, and has anyone dropped teeth in the front and what was the result?
The way I worked it out was to take the top speed (187km/h) divide that by the number of teeth on the front sprocket (17) and times that by the new front sprocket teeth:
The results look like this:
(187/17 = 11) x 16 = 176km/h
(187/17 = 11) x 15 = 165km/h
Is this valid?
Thanks
Al