What causes engine braking when the clutch isn't engaged? By FACE PLANT FOR LIFE (Read 581 times)

[FACE PLANT FOR LIFE]

Okay, so I'm just wondering how this would work. So say I'm traveling down a hill at 10 miles per hour like I was today. Just to be fun, I cut the engine so I can coast down the hill in silence. But I notice that the engine won't cut out until I reach a low enough speed (although throttle won't respond with ignition off). Once it does cut off though, it's like the bike was released from a brake and it freewheels without restriction. How does the GY6 clutch cause engine braking without any engagement of the clutch?

[Guitarman]

As long as the engine is over the threshold RPM the clutch is engaged. When it idles down to below say 2000 RPM for example, the clutch lets go and the bike can then freewheel.

[Bashan]

Exactly, the tensioner arms are RPM dependent, not ignition key. If the clutch is spinning fast enough the arms fly out and engage the clutch.

[FACE PLANT FOR LIFE]

It feels like my clutch is always engaged. Maybe my idle is too high, then? Because unless my engine is stopped, I can feel an engine braking effect. I can tell you that I'm idling far below 2000 RPM. Maybe 1100 AT THE MOST

[Guitarman]

Your idle depends on the springs you have in your clutch. Some are 2000 some are 1500..
Strong spring and weights that are too light could do it.

[FACE PLANT FOR LIFE]

I'm thinking I might have 1000 RPM clutch springs at this rate. I should not have to get my idle down so low to disengage the clutch. Or maybe my clutch springs are worn out!

[Alleyoop]

Take the CVT cover off start it up let it idle and take a video of the cvt and that will show if there is a problem and if so what is the problem.

[rks]

Of course, you do realize, that while doing as you described, your engine is still sucking gas through the carb....it's not being burned, just sucked in one valve, compressed, and pushed out the other valve....filling your exhaust system with a combustible mixture.

Not a good thing for many engine components....but ...it is your scooter

[FACE PLANT FOR LIFE]

I didn't say I made a habit of killing it while I was moving. It was a one time thing that resulted in an observation.