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Scooters - 125 to 300 => Downtown 300 => Topic started by: Yoni159 on January 08, 2020, 05:51:30 PM
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My scooter losse some of his power his not strong like before.know accelorate feels very weak. and the rpms goes high than before. And the engine is screams and the power not like before. All service are done v belt is ok. All are genuine parts and best oils..
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Slipping clutch, belt or both. Maybe splines stripped.
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My belt is new i replaced her before 6000km . It can be the spark plug mabey?
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Did you check the splines as suggested by Crossbolt?
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What is splines?
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Gear-like grooves on a shaft to transmit torque to or from that shaft and what is mounted or slides on that shaft. You will find splines on the engine crankshaft extension at the forward part of the CVT, at the rear of the CVT for the clutch and on that gearbox output shaft to drive the rear wheel. Any one of these could be stripped smooth and cause your problem. Possible but generally not likely. Just possible. A slipping belt is more likely because your mechanic did not intall your new belt correctly.
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No.. my mechanic are the best in the city after the service my scooter was work fine. It can be maybe rear wheel bearing? My rear wheel hardly spins when the engine turn off
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check front and rear pulley for grease, you can clean with disc brake cleaner,. while you are in there check rollers make sure the rollers are facing the right way, because the centre Wt. could come out,.
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No.. my mechanic are the best in the city after the service my scooter was work fine. It can be maybe rear wheel bearing? My rear wheel hardly spins when the engine turn off
I never considered a bad bearing! Yes, the back wheel should be free to turn by hand!
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No.. they move really hard .. i guess my bearing are done. Its a problem to replace them? Not for me.. for the mechanic
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Depends if the one on the right side which is easy or the ones in the gearbox which are not hard to change just more involved.
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Heres a video maybe you can tell me from the video if the bearing are bad.
https://youtu.be/9AR-7XXGDN8
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Someone else because I no longer have youtube.....
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https://streamable.com/k63yd
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Ask your mechanic to spin your rear wheel.
I'm no expert, but I see/hear nothing unusual in your rear wheel video.
Stig
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Looks and sounds normal like mine. I do not think your problem is there. You may want to change the gear oil to see what the original oil looks like.
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I just watched the video, it seems that the rear wheel nut is loose or the rear gear oil is mostly gone.
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I was changed the gear oil 200km ago.. i think the bearing its ok
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Can you put your bike on its centre stand and run the engine over various rpms. Record a video of the rear wheel and transmission and post the link here or on YT etc.
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Ok, some of us are in agreement that your rear wheel and its bearing, and gears looks and sounds normal when you turn the wheel by hand.....
So back to your original complaint of screaming engine and lower top speed and power loss:
Gease or oil on the pulleys could cause all the above. A leaking seal in the CVT or incorrectly done lube job?
Or - too light weight rollers installed could give same performance problems.
Does your expert mechanic agree with you about "screaming engine & power loss"?
Stig
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Ok, some of us are in agreement that your rear wheel and its bearing, and gears looks and sounds normal when you turn the wheel by hand.....
So back to your original complaint of screaming engine and lower top speed and power loss:
Gease or oil on the pulleys could cause all the above. A leaking seal in the CVT or incorrectly done lube job?
Or - too light weight rollers installed could give same performance problems.
Does your expert mechanic agree with you about "screaming engine & power loss"?
Stig
If I had to guess, I’d say that it was worn or damaged rollers, especially if everything else checks out and the reduced performance is relatively new.
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