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Post by borokaman on Jun 18, 2024 3:54:51 GMT -5
I have a question regarding the above scooter, which I recently purchased from the market, where its maximum speed is legally limited to 35 km/h. Therefore, its top speed is 36 km/h. I started by removing the plastic spacer from the variator, but after doing so, the scooter began to behave strangely. Every time the speed exceeds 36 km/h, after a few seconds, the scooter behaves as if the fuel supply is cut off/limited, and its speed drops, despite the throttle being fully open. Each time the speed drops below 33 km/h, it regains fuel supply and starts accelerating again. And again, about 2-3 seconds after exceeding 36 km/h, it starts slowing down, and this cycle repeats. Sometimes it reaches a speed of 38 km/h, sometimes it reaches a maximum speed of 45 km/h, but this depends on whether I am going downhill or uphill and whether it can accelerate even more within those two seconds or not. It seems to me that the ECU might still be regulating this speed.
If I'm right I have a few more question.
In some ECUs there is a wire that sends feedback, probably info about current speed. In some cases its enough to cut the wire to bypass speed limit. Is that an option in my case? If not, is it possible to program ECU to remove the limit?
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Post by GrumpyUnk on Jun 19, 2024 10:47:32 GMT -5
I doubt the fuel supply is being cut. I suspect the CDI may be getting a 'quit sparking' signal to limit the speed. Some have a sensor in the CVT housing that notes the rpm of the clutch bell, and thus that of the rear wheel. It reports the signaled speed, and the signal interrupts the CDI function. Take a look at your owners manual schematic to see if there is a CDI limit wire fed from a wheel speed sensor(direct or indirect). tom
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