max

Wednesday

OPERATION

Demo:--Click this link below to see working demo in manual and power mode:---

http://www.pirmil.info/scoot/ssiburg/650info_suzuki-1_cvtdemo.shtml (external link)

There are 3 modes in which a rider can utilize the CVT.

Auto

This is the mode the 650 is in when it is first turned on. It balances between fuel economy that scooters are expected to have, and the power the 650 is capable of.

Manual Mode

Manual mode allows the rider to switch the CVT primary pulley position manually between a fixed number of ratios, using a pair of up/down buttons on the left handlebar switch cluster. For K3/K4 there were 5 fixed ratios, and a 6th (Overdrive) was added for the K5 and above models. Note that Manual Mode does not provide full manual control – the ECU will not allow change up below certain speeds and will automatically change down below certain speeds. If the motorcycle is brought to a halt the CVT will automatically start off in 1st gear. Like a regular manual gearbox the CVT will not change up to the next gear unless specifically selected by the rider.

In manual mode the gear ranges available are as follows:
Metric
RatioMinimum Change Up PointAutomatic Change Down PointMaximum Speed in Ratio
1N/AN/A57 kmh
222 kmh17 kmh85 kmh
330 kmh24 kmh120kmh
440 kmh32kmhTBD
550 kmhTBD200 kmh (theoretical)
659 kmhTBD212 kmh (theoretical)


US
RatioMinimum Change UpPoint Automatic Change Down PointMaximum Speed in Ratio.
1N/AN/A35 mph
214 mph11 mph53 mph
319 mph15 mph76 mph
425 mph20mphTBD
532 mphTBD124 mph (theoretical)
637 mphTBD132 mph (theoretical)

Note 1: speeds stated above are according to the speedometer which reads 10% high.
Note 2: at ~13 kmh (8 mph) the clutch will automatically release. With the bike rolling (e.g. whilst coasting downhill with minimal throttle input) the clutch will not re-engage until 24 kmh (15 mph).

Power mode

Power mode is an electronically selected option (push button) that holds the CVT ratio lower with an approximately 1,200 rpm higher than regular RPM (author’s note: I believe this to correspond with the engine’s power peak whilst the Auto mode corresponds with the engine’s torque peak). The purpose of Power Mode is to improve acceleration performance, it also has a side benefit of providing stronger engine braking when decelerating.

Engine Braking

By Colchicine

Engine braking is a prominent feature of the 650. Although most people find it to be comparable to or less than some manual transmission motorcycles, it is a feature that bothers a lot of users while some others actually favor it. It is ideal riding in the twisties.

Here's an explanation for why there is strong engine braking in the 650.
Anytime you let off the throttle, the computer is setting the CVT up to be ready for the next throttle input. If the computer kept the same gear ratio as when the throttle was rolled off (therefore, less engine braking), there are going to be too many instances where the CVT is going to be in too high of a gear because the bike has slowed down, resulting in a lack of power or worse, lugging. The computer is monitoring the throttle position and speedometer signal and adjusting the pulleys to a gear ratio that maximizes available power when the throttle (or rider) calls for it. This also eliminates the possibility of lugging the engine.

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