Honda CT90 Automatic Clutch Operation
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- čas přidán 20. 10. 2019
- This is a short clip from a longer video I made showing how the automatic clutch in a CT90 operates when you shift gears. To make this video I machined the cases of a CT90 engine so it could still be assembled and all the parts operate, but you could see all the internal components as they operate.
I made a longer video showing the complete cut-away engine here at this link: • CT90 Engine Exposed!
Visit my CT90 blog if to see more of my posts on restoring Honda CT90 and CT200 motorcycles here at this link: ct90restoration.blogspot.com - Krátké a kreslené filmy
Fantastic video, just what I was looking for. Thank you for taking the time to modify the case and make this demo rig, very nicely done!
Exactly what I was looking for. Thank you for this excellent visual aid 😊👍
great vid.
Hello sir nice video! I have a problem engine is working well but when i go from first to second gear or from second to third engine stops. What the really problem?
I bought a 1971 CT-90 about a year ago and a few days ago the shifting was erratic so I removed the Clutch housing to see if the shift drum stopper plate screw might have come loose, but it was ok. So I figured I would replace the Clutch plates. When I went to remove the clutch there was no spring in between the the spring on the ball ramp plate and the plate that contains three ball bearings. Do you have any idea what that spring does ?
Hi Jim, I don't know what Honda's official intent was in including that spring, but take would be that because the spring preloads the plate with the three balls against the detents of ball ramp plate mounted to the cover that it keeps the plate with the balls centered in the detents while you make the clutch adjustment. This would help prevent the plate with the balls from rotating to a position where the balls were not aligned with the detents when you are adjusting your clutch and initially loosen the adjustment screw that backs the detent plate out. Also, ball ramp mechanisms like the one used here in the CT90 like to have a very slight preload of the balls in the detent of the ball ramps so that the balls roll up the ramp and not slide when the mechanism operates.
My boys have an XPro go kart with the same setup as your 90. But I do not see the 3 ball bearing piece and the keeper I’ll call it that seems necessary to hold the shift lever in place. Looking online for a new clutch, most are not sold with these two parts either. Is this only necessary for multiple gears, or do I need it?
I'm not that familiar with the X-Pro engines, and while they may use a clutch pack that is similar to a Honda CT90 the mechanism used to push on the clutch pack to release the clutch may be different and not use a CT90 type of linkage. If you look at the inside of the engine cover that goes over the clutch assembly you should see what components interface with the clutch pack when it is operated. Sorry I couldn't be of more help.
Hello, very good stuff ! I guess the Honda ST 50 has the same system ?
I'm not really familiar with the ST 50, but if it has an automatic clutch then there is a good chance the adjustment is similar.
How does it knows when to shift to next gear?
The shifting from one gear to the next is a manual operation and only occurs when the rider operates the shift lever to shift up or down between each gear. The “automatic” aspect of the clutch is the term used to describe how when the gear shift lever is operated by the rider, the motion of that lever releases the clutch in addition to changing to the next higher or lower gear depending on which way the lever is moved.
@@michaelmineart1889 so the gear shift lever is still there but only the clutch lever is removed as that's now made operate in sync with gear shift pedal.