I designed a Clutch Designed Rear Set Shifter.

Reggie3cl said:
So, Ron, don't keep up in suspense, how did you do it?
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Opened the bottle, poured some in the glass, clutched the glass and tipped it back.
 
Ron designed a clutch shifter and has been using it for 20 years ............ and it's still top secret.

Thank God Henry Ford didn't test the A Model for that long before production.
The Japanese would have been making Lexus' before the A Model went into production.

Is Ron coming to Australia for the BSFOS? I need a good chuckle.
 
Laverda SF said:
6056897294_f1f15bc950_o.jpg


I'm sure all Laverda Forum Members have seen this Pic as a mistominer but few have questioned as to how.

Dainty yet strong vibration free little Heel/Toe Rear Set Shifter with a Clutch - Needs Modern Refinement for Production and that includes in sight for clocking - Whatever - For Any Motorcycle .

I'm not going to spill my beans (Yet) as to the engineering design.

Nothing like Mechanical Contact but today youngsters have computerized Hydraulic Electronic Shifter Paddles with ECM's that Blows my mind - I'm an Old Man :o)
Wish I did - Would have'd a few batterys - Unfortunately my SF didn't come with a Kick Start - LOL
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Hi Ron

the setup in the photo looks pretty much like the factory heel/toe shifter mechanism on my former 8000 series drum brake SFC 750. A straight rod from the shifter mechanism sticking out of the trans cover, linked to the heel/toe mechanism. The factory set up had length adjuster in both ends of the rod.

what am I missing that would make this any sort of quick shifter?

Paul LeClair
 
Grant said:
A quart of bourbon.
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:LOL:

Hang on, is my logic correct, or am I confused?
Wouldn't Rons set up require more pedal throw than if both arms were the same length?
And increasing the arm length on the shifter to be longer that that of the arm on the gearbox would decrease the pedal throw.

When I busted my leg, I'm sure I shortened the gearbox arm to reduce the pedal throw.

Rons bike is really clean.
 
If you magnify the pic it looks like a cable is running up the lower tube of the peg/muffler mount. I can't see a lever at the pedal but it could be he has rigged something to partly disengage the clutch on up shifts [fanning?] to have an analog quickshifter although a momentary kill switch would do the same thing. OR it might be the bourbon I'm sipping.
 
wdietz186 said:
If you magnify the pic it looks like a cable is running up the lower tube of the peg/muffler mount. I can't see a lever at the pedal but it could be he has rigged something to partly disengage the clutch on up shifts [fanning?] to have an analog quickshifter although a momentary kill switch would do the same thing. OR it might be the bourbon I'm sipping.
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Yeah, pour yourself another... :D

piet
 
I'm taken with Laverda Forums Member's interest in my re-set shifter - Mine is with out a doubt one of a kind but - It does have to be refined and Industrialized  - It should be 1152 Alui-Casted into one piece with Hi -Tensil thread or worm gear bolt with at least a 150b spring.

Another hint: The spring is in the peg with a coller and rubber over it - About 1`in Dia for a foot peg.

My original build consist of an up side down reversed Moto-Morini Heel-Toe Shifter/Jap Haybusia Bell Crank/ Ford Metric Head Bolts, Inner Valve spring from an American V8 and a 12 gauge cleaning rod with some NASCAR Holley Carb fittings. Could have gone "H" Hem-Joint. 
 
Magical Rear Set - WTF! And how I hang my Exhuasts _HIC! - Breganzie's are just plain noisy - Jet them Dellorto's properly and hang the Exhaust so it doesn't interfere.

The only reason I position my rear-sets back as far as possible is because I have long legs - Doesn't mean you can't use the Tri-Position.

Thanks Helicopter for your encouragement.

Note: Particularity the short stanchion of the shifter bell crank to the main shifter lever - You got approximately less then a 1 inch click into any gear  ;o)
 
I switched to some Patron Reposado and now it looks like a fancy centering spring arrangement to allow a heavy shift pedal to return to center after a 90000000 rpm shift!
 
I'm at work so I can't drink. Maybe I'll just give myself a shot of morphine to calm the nerves and open my mind to all the possibilities in this magical design.  :o
 
The engineering of this rear-set is so simple I can't understand why you guys can't figure it out after I have submitted all the basic parts.

6056897294_f1f15bc950_o.jpg


I'm NOT saying it's Magical but it's really GOOD.

Off course I'm NOT going in to detail on how to "PIN" all the parts together and "Thread" them ;o)

I can just hear you guys saying it's not a true clutch design but keep in mind that 150 lb spring against a spiral thread contains rebound and allows for shorter shifts with out it rattling apart and centers perfectly. If you want to put a clutch disc in her by all means but in my opinion it would not be worth the complicity in order to keep it Simple and Rugged.

Now you know - Is there a market for this type of shifter?

Ok wdietz186: Here's your cable ;o)
6056348651_f21038b7c8_o.jpg

I do believe I used a Yamaha 500 shifter reversed and up side down and that rod is a head bolt from a Honda - The rest is just fabricated plumbing. Should I mention again that I have long legs - LOL

Other then for the original foot ball head light casing, dual seat and DMC exhaust, I still have all the original parts for the that 71/72 750SF.


 
Hi Ron

I am trying to understand.

if I am following your description, you have put a 150 pound force spring INSIDE the footpeg which acts as the pivot for the heel and toe shifter?

it presumably would assist shifts with spring pressure in one direction, and oppose shifts with spring pressure in the other direction?

I do not see ANY connection to the clutch to affect the clutch in any way, at least in the photos you posted, and I do not see what relevance the photo of the brake side lever arrangement has in relation to the shifter on the other side of the bike.

these days many of the quick shifters use a switch on the gear lever to very quickly interrupt engine power during a clutch less upshift. I had one such arrangement on my ZX 14 for a while, I took it off in sympathy for the transmission and its likely life span.

anyway, like Fox Mulder on the X Files "I want to believe........" but I need a little more help........ ???

Paul LeClair
 
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