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I finally had some time to slot the rear brake pedal and complete the look of my modified gearshift linkage and shifter. Here's a link to that post from a few weeks ago.
Stock Shift Linkage - Slotted & Lightened - Triumph675.Net Forums
Unfortunately, some of those photos are no longer visible, so here's a couple for reference.
Although what few photos I took are not the greatest quality, here's the new machined slot fresh off the Bridgeport. The part was clamped so the right or outside of the pedal (when on the bike) faced up. A 1/8" diam. cutter was inserted just aft of the footpad and the slot cut rearward; parallel to the lower edge of the pedal (side view when on the bike). The process was repeated for the upper edge. This way, the slot increases in width toward the rear of the pedal… a look I wanted to create. A larger diameter bit was used to cut the rearmost pocket.
Why not cut the slot completely through the pedal like I did on the gearshift linkage parts? The peg retaining the two springs (pedal return and brake light switch) would be lost. I did mock up a new pedal return system that omitted the original return spring - and I could have just aced the rear brake light switch completely.
Although I don't use the rear brake much on the street, it's obviously needed to safely stop on a loose surface. More importantly, if excessive pressure was applied in an emergency or panic stop on the street, I would not want to risk the pedal twisting or breaking. Therefore, the slot was not milled completely through, producing the remaining 1.5mm (.060") thick wall. This wall provides the required strength to prevent twisting and really wasn't any more work than machining completely through the part.
When all the components are installed, I didn't see why the bottom of each spring couldn't share the same notch of the peg. I shortened the peg and extended the notch around the front and back of the peg to ensure the springs stay attached.
Here, I have removed all the casting and parting lines and added a radius to the edge of the slot. At this point, the part has been sanded with 320 grit paper. I takes a few passes with finer grades before you can begin to polish. A stock pedal is on the bottom.
With final polishing nearly complete, here's my genuine imitation "black hole"! It's actually adhesive backed vinyl that creates the illusion of a through slot.
Final revised pedal vs. stock. I know, the photos don't really do justice to the work and polish job. OK, they suck. :laugh: Sorry Scott.
I found a spring at the local hardware store to replace the original. To ensure retention of both ends once installed, I trimmed the closed loop at the top and re-formed the hook at the bottom. The final part is on the left and the stock spring on the right.
Here's the backside of the assembly. The pedal return spring and its upper attachment tab were not modified.
And the finished part. Standing alongside the bike, you really can't tell the slot is not cut completely through the pedal.
That's DEFINETELY it. I'm done. This renews my membership in "Modders Anonymous". (the OG's will remember that club, eh?)
No more slotting. Well…………….. Maybe.
Stock Shift Linkage - Slotted & Lightened - Triumph675.Net Forums
Unfortunately, some of those photos are no longer visible, so here's a couple for reference.



Although what few photos I took are not the greatest quality, here's the new machined slot fresh off the Bridgeport. The part was clamped so the right or outside of the pedal (when on the bike) faced up. A 1/8" diam. cutter was inserted just aft of the footpad and the slot cut rearward; parallel to the lower edge of the pedal (side view when on the bike). The process was repeated for the upper edge. This way, the slot increases in width toward the rear of the pedal… a look I wanted to create. A larger diameter bit was used to cut the rearmost pocket.

Why not cut the slot completely through the pedal like I did on the gearshift linkage parts? The peg retaining the two springs (pedal return and brake light switch) would be lost. I did mock up a new pedal return system that omitted the original return spring - and I could have just aced the rear brake light switch completely.
Although I don't use the rear brake much on the street, it's obviously needed to safely stop on a loose surface. More importantly, if excessive pressure was applied in an emergency or panic stop on the street, I would not want to risk the pedal twisting or breaking. Therefore, the slot was not milled completely through, producing the remaining 1.5mm (.060") thick wall. This wall provides the required strength to prevent twisting and really wasn't any more work than machining completely through the part.

When all the components are installed, I didn't see why the bottom of each spring couldn't share the same notch of the peg. I shortened the peg and extended the notch around the front and back of the peg to ensure the springs stay attached.

Here, I have removed all the casting and parting lines and added a radius to the edge of the slot. At this point, the part has been sanded with 320 grit paper. I takes a few passes with finer grades before you can begin to polish. A stock pedal is on the bottom.

With final polishing nearly complete, here's my genuine imitation "black hole"! It's actually adhesive backed vinyl that creates the illusion of a through slot.

Final revised pedal vs. stock. I know, the photos don't really do justice to the work and polish job. OK, they suck. :laugh: Sorry Scott.


I found a spring at the local hardware store to replace the original. To ensure retention of both ends once installed, I trimmed the closed loop at the top and re-formed the hook at the bottom. The final part is on the left and the stock spring on the right.

Here's the backside of the assembly. The pedal return spring and its upper attachment tab were not modified.

And the finished part. Standing alongside the bike, you really can't tell the slot is not cut completely through the pedal.

That's DEFINETELY it. I'm done. This renews my membership in "Modders Anonymous". (the OG's will remember that club, eh?)
No more slotting. Well…………….. Maybe.