Yamaha PW-X
- Thread starter net200777
- Start date
Scooteretti
Active Member
@net200777 what cadence (rpm) are you riding at when you say it's weak?
net200777
Member
Full seven lt 8.0
Manu
Active Member
- Region
- Europe
- City
- Spain (Galicia)
The yamaha system is very different from the bosch, I guess the bosch always has a fairly high level of engine assistance even on flat terrain.
The bosch is a very suitable system and little effort of the rider to climb, it is like putting the accelerator of the handlebar ....... on the foot.
You see high levels of assistance in both flat terrain and up to speeds of 25km / h.
The Yamaha is more technical and requires a prior understanding.
You start the bosch cx and lower your assistance to 0 engine and you start pedaling on a flat terrain ..... you will see that to reach those 25km / h you need a lot of cadence, having a disk of 16 to 20 teeth allows speeds much more limited but also with less effort of your legs that cover a radius of speed within those 25km / h, the unfortunate thing is that you can not maintain high cadence in very closed curves by the inclination of the ebike.
To reach a speed of 25km / h with 20 tooth disc and 11 cassette you need to pedal with human effort at 100 rpm per minute, when you see that you pedal much less than that and reach 25km / h the effort is all of the engine but that does not mean that it is 100% engine assistance, that you will only see when climbing high mountain gradients. The same happens in the Yamaha, but the Yamaha has a double plate multiplier in your case and that means you have to know which dish is the most appropriate for your driving.
The yamaha with a 32 disc and a cassette of 11 teeth at 67 rpm already have 25.1 km / h of human pedaling and with the disc of 44 you have at that same cadence a 37.3 km / h, what you observe is that the 44-tooth plate is really for leveling at a very low rpm if you have a lot of leg strength or use it on mountain descents because you apply its torque throughout that range of speed 0 to 45km/h easy and really climbing the mountain or plain you would use the 32 teeth to play with the cassette group.
The Yamaha has more top speed to the bosch going down the hill and with or without use of the engine even against the because you can apply your human torque at low cadence to high speeds supported by gravity even against the wind.
The 44-tooth disc is clearly for downhill and flat terrain where the rider seeks a low rpm or cadence within those 25km / h.
The disc of 32 is clearly to climb the mountain and the cadence that allows along with the assistance of the engine and do the same len flat terrain at a much higher rate and more comfortable for your legs within those 25km/h.
The Yamaha having a multiplier and demultiplier group so evolved in flat terrain and going down the mountain practically the engine does not have to give assistance or very little assistance, but when it touches a mountain climb the engine depending on the case can contribute up to 100%. for example a gradient of 30º where it has the disc of 44 teeth and the sprocket in 13 teeth, possibly in that case if it reaches 100% assistance when starting.
The 44 x 40cassete to 67 rpm cadence is 10km/h.
The 32x 40 cassete to 67 rpm cadence is 7,3km/h.
The 44x 20 to 67 =20,1km/h.
The 32 x 20 to 67=14.6 km/h.
The 32 x 11 and 32 x40 top speed is 25km/h all range speed the engine yamaha...
The 44 x 40 until 44 x 16 top speed 25km/h all range speed the engine yamaha... a low cadence 67rpm .
Exceeding the 44 x 16 at 44 x 11 is automatically out of the Yamaha engine's 25km / h range. Clearly for descent the mountain,
put human torque and top speed.
bosch cx = 350w
yamaha pwx=250w
The bosch is a very suitable system and little effort of the rider to climb, it is like putting the accelerator of the handlebar ....... on the foot.
You see high levels of assistance in both flat terrain and up to speeds of 25km / h.
The Yamaha is more technical and requires a prior understanding.
You start the bosch cx and lower your assistance to 0 engine and you start pedaling on a flat terrain ..... you will see that to reach those 25km / h you need a lot of cadence, having a disk of 16 to 20 teeth allows speeds much more limited but also with less effort of your legs that cover a radius of speed within those 25km / h, the unfortunate thing is that you can not maintain high cadence in very closed curves by the inclination of the ebike.
To reach a speed of 25km / h with 20 tooth disc and 11 cassette you need to pedal with human effort at 100 rpm per minute, when you see that you pedal much less than that and reach 25km / h the effort is all of the engine but that does not mean that it is 100% engine assistance, that you will only see when climbing high mountain gradients. The same happens in the Yamaha, but the Yamaha has a double plate multiplier in your case and that means you have to know which dish is the most appropriate for your driving.
The yamaha with a 32 disc and a cassette of 11 teeth at 67 rpm already have 25.1 km / h of human pedaling and with the disc of 44 you have at that same cadence a 37.3 km / h, what you observe is that the 44-tooth plate is really for leveling at a very low rpm if you have a lot of leg strength or use it on mountain descents because you apply its torque throughout that range of speed 0 to 45km/h easy and really climbing the mountain or plain you would use the 32 teeth to play with the cassette group.
The Yamaha has more top speed to the bosch going down the hill and with or without use of the engine even against the because you can apply your human torque at low cadence to high speeds supported by gravity even against the wind.
The 44-tooth disc is clearly for downhill and flat terrain where the rider seeks a low rpm or cadence within those 25km / h.
The disc of 32 is clearly to climb the mountain and the cadence that allows along with the assistance of the engine and do the same len flat terrain at a much higher rate and more comfortable for your legs within those 25km/h.
The Yamaha having a multiplier and demultiplier group so evolved in flat terrain and going down the mountain practically the engine does not have to give assistance or very little assistance, but when it touches a mountain climb the engine depending on the case can contribute up to 100%. for example a gradient of 30º where it has the disc of 44 teeth and the sprocket in 13 teeth, possibly in that case if it reaches 100% assistance when starting.
The 44 x 40cassete to 67 rpm cadence is 10km/h.
The 32x 40 cassete to 67 rpm cadence is 7,3km/h.
The 44x 20 to 67 =20,1km/h.
The 32 x 20 to 67=14.6 km/h.
The 32 x 11 and 32 x40 top speed is 25km/h all range speed the engine yamaha...
The 44 x 40 until 44 x 16 top speed 25km/h all range speed the engine yamaha... a low cadence 67rpm .
Exceeding the 44 x 16 at 44 x 11 is automatically out of the Yamaha engine's 25km / h range. Clearly for descent the mountain,
put human torque and top speed.
bosch cx = 350w
yamaha pwx=250w
Last edited:
Similar threads
