ckrockets
Junior Member
So do you think it's a coincidence that at exactly 4.5K RPM in 6th gear the speedo reads 55 MPH?
I don't think so personally...I believe Yamaha engineers observed that 4.5K was the sweet spot in this motor for minimum vibrations and noise....and they appropriately geared 6th so that it would be at 55 MPH (universal/politically correct/average highway speeds)....I was cruising down the blue ridge parkway yesterday in 6th gear holding 55 MPH and it was shear heaven it was so smooth (engine wise)...now on I-26 doing 70 MPH in 6th it was a bit buzzy and I can see that being a problem on long long interstate halls...
With this in mind I plan on doing a lot of touring with my new FZ6 and I would love to be able to do 70 MPH at 4.5K RPM in 6th gear....here's the thing though...
I don't want to use the sprockets as it will change the drive ratios for all the gears...and i rather like 1-5 the way they are now....
So what I want to look into is solely replacing 6th gear in the transmission so I can obtain the exact result I am looking for....
I'm not sure is I need to increase or decrease the number of teeth on 6th gear (there are two it looks like wheel and pinion) and it's going to be challenging to find a gear from a donor bike that is compatible with the FZ6 transmission (compatible with the existing dogs, shifts forks and such)...
Ronayers.com Microfiche Yamaha>Motorcycle>2009>FZS6YL/FZS6YB/FZS6YCL/FZS6YCB>TRANSMISSION
Another thing to consider is can I get to the transmission in this motor from the bottom....this conversion will not really be worth it if I have to go from the top to the bottom to get to the transmission...
Does anyone have any input?
Thanks,
Mark
I don't think so personally...I believe Yamaha engineers observed that 4.5K was the sweet spot in this motor for minimum vibrations and noise....and they appropriately geared 6th so that it would be at 55 MPH (universal/politically correct/average highway speeds)....I was cruising down the blue ridge parkway yesterday in 6th gear holding 55 MPH and it was shear heaven it was so smooth (engine wise)...now on I-26 doing 70 MPH in 6th it was a bit buzzy and I can see that being a problem on long long interstate halls...
With this in mind I plan on doing a lot of touring with my new FZ6 and I would love to be able to do 70 MPH at 4.5K RPM in 6th gear....here's the thing though...
I don't want to use the sprockets as it will change the drive ratios for all the gears...and i rather like 1-5 the way they are now....
So what I want to look into is solely replacing 6th gear in the transmission so I can obtain the exact result I am looking for....
I'm not sure is I need to increase or decrease the number of teeth on 6th gear (there are two it looks like wheel and pinion) and it's going to be challenging to find a gear from a donor bike that is compatible with the FZ6 transmission (compatible with the existing dogs, shifts forks and such)...
Ronayers.com Microfiche Yamaha>Motorcycle>2009>FZS6YL/FZS6YB/FZS6YCL/FZS6YCB>TRANSMISSION
Another thing to consider is can I get to the transmission in this motor from the bottom....this conversion will not really be worth it if I have to go from the top to the bottom to get to the transmission...
Does anyone have any input?
Thanks,
Mark