Repeating what I am trying to achieve: I want to bring my personal competition trials bike in line with my other bikes, an auto clutch allowing loss of the manual clutch (and I mean no clutch lever at all), which
allows me to plumb the rear brake direct to any DOT-fluid based clutch master cylinder for a 1-finger strong rear brake. This in turn allows me to lose the foot brake.
The result is an extremely simple controls scheme. Mentally easy to handle and reprogram to, and as my experience has show, increasing both control, confidence, and safety. And zero stall potential!
Both brakes available in an instant, no matter where one's feet happen to be, excellent clutch slipping performance by throttle only that rivals manual control - especially when one gets tired. And this was unexpected:
The rear brake is connected to the 'brain bone' in the same spot as the clutch, and releasing the brake is just like releasing the clutch on an auto clutch bike. Throttle pulse, release clutch (er, um brake), hop
the front wheel or pop up on a step... amazing really.
The only thing missing is no longer important to me: massive-throttle splatters. Can still do them but don't want to. Not needed at the local expert level down.
UPDATE - THIS PROJECT (which was on hold a long while)
Garry Buzelli at EFM auto clutch has experience adapting to conventional helical coil springs clutches, and the newer so-called 'diaphragm' springs clutches are different in significant ways,
like less than half the clutch plates and much higher spring clamping force from the single Belleville spring. A problem, an advantage? I will explore this further.
There is a 2023 Montesa Cota 301RR (blue/white) sitting at the local Honda dealer that I have been eyeing. I know the 4RTs well as I have worked on a number of them from 2005 on. Every time I
ride one I find them weird. I know I could reprogram my soul to one, but don't know how long that would take. A risk that I would not fully mesh with one.
Certainly the engine characteristics of the 301RR would suit auto clutch adoption. And having a conventional clutch lowers implementation risk.
But the cost of commitment to this project going new is steep: A new 2023 301RR in the below color I prefer, sits near me at a Honda dealer of repute $13,500!
$2,000 MORE and one model year older than a new TRS Gold!
One concern I had about the 4RT is that unlike the former 315R, the clutch slave cylinder is in on the clutch cover, requiring a 'push in' rather than 'push out' pressure plate, and that require flipping around the clutch hub.
And that I think might complicates auto clutch implementation. If it does, I recently discovered that the the pre-4RT 315R was 'push out' on the pressure plate from the slave cylinder being on the left center case, resulting
the more common 'right side out' clutch hub. Below you can see both the 315R clutch hub and the 4RT clutch hub in their orientations as you would see them looking in. Both appear to have the same 19-tooth spline and spline
diameter, and in the same place relative to the driving transmission shaft. I will find out from Gary if the 315R part would ease auto clutch implementation. At 76 Pounds, worth the buy risk.
Will update y'all as I know more. For now, I have a major trials event to go back to working on.