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Home Brew / Yamaha FZ S conversion (150 cc)
« on: June 12, 2019, 12:28:01 PM »
Hi Everyone,
For a while, I have been thinking about giving a shot at converting my Yamaha FZ S and finally with all budget issues sorted, I am all set. Now while I am at it, I decided to further amp up its performance. So I did some quick calculations to choose the most ideal motor for my use case (considering cost and motor specs) to achieve the desired performance:
1. Top speed of 110 kmph (~ 70 mph)
2. 0-80 kmph (0-50 mph) in about 5 seconds
My calculations for a 4:1 gear ratio and 17" rear wheel suggest a motor with instant torque of 60 Nm (~ 45 ft-lb) and a peak loaded RPM of about 5300. After digging up a little, I found ME1115 to have a similar performance (although I would have to further lower the gear ratio and maybe compromise a bit on the acceleration side).
Hoping that I have not messed up with my calculations, I wanted to get some opinions on the motor selection before I go ahead and order it. Also, I wasn't able to spot much differences between the performance specs of ME1115 and ME1306 (replacement for obsolete ME0913) and therefore I was confused about choosing between the two. Is there a difference between the type of controllers they use? If so, I would like to go for the cheaper option (motor + controller) and therefore information on this would greatly help.
Any other suggestions or advises are welcome as well.
Thanks in advance,
Akash
For a while, I have been thinking about giving a shot at converting my Yamaha FZ S and finally with all budget issues sorted, I am all set. Now while I am at it, I decided to further amp up its performance. So I did some quick calculations to choose the most ideal motor for my use case (considering cost and motor specs) to achieve the desired performance:
1. Top speed of 110 kmph (~ 70 mph)
2. 0-80 kmph (0-50 mph) in about 5 seconds
My calculations for a 4:1 gear ratio and 17" rear wheel suggest a motor with instant torque of 60 Nm (~ 45 ft-lb) and a peak loaded RPM of about 5300. After digging up a little, I found ME1115 to have a similar performance (although I would have to further lower the gear ratio and maybe compromise a bit on the acceleration side).
Hoping that I have not messed up with my calculations, I wanted to get some opinions on the motor selection before I go ahead and order it. Also, I wasn't able to spot much differences between the performance specs of ME1115 and ME1306 (replacement for obsolete ME0913) and therefore I was confused about choosing between the two. Is there a difference between the type of controllers they use? If so, I would like to go for the cheaper option (motor + controller) and therefore information on this would greatly help.
Any other suggestions or advises are welcome as well.
Thanks in advance,
Akash