Sunday, 31 May 2020

'73 Suzuki GT250 - Part 13 - MX footpegs and custom brackets

I had a pair of IMS Pro Series footpegs meant for Kawasaki '99-01 KX125 250 (#293112-4) laying around which I had purchased for a previous project of mine but never ended up using them. After getting rid of that bike I stored them for later use. At one point I had them for sale too but after time went by and I still had them I decided to utilize them in this build. 

I designed a pair of brackets to be able to fit them to frame of my GT250K with help of four weldable inserts and M8 bolts. Inserts were turned in lathe out of 18 mm round steel bar and parts of brackets cut out of 6 mm steel sheet using water jet cutter and welded together.

Footpeg assembly

Pair of IMS Pro Series footpegs
for '99-01 Kawasaki KX125/250 (#293112-4)

Pair of pins, 10x49.5 (#92043-1564)
and springs, step (#92144-1951)

Dimension drawing of M8 frame inserts

Inserts were turned in a lathe out of 18 mm steel round bar

Dimension drawing for parts of footpeg brackets

Preview of cut drawing for parts of footpeg brackets

NC-code for water jet cutting

Water jet cutter


Exterior...

...and interior of sand blasting cabinet

Blank after sand blasting

Pieces separated with a hand saw
Since water jet cutter tends to leave chamfers to holes I decided to make them bit smaller and drill them to right size after cutting. I did that in two stages. First time to 8 mm and after mocking up and welding M8 inserts to frame to 9 mm. 8 mm holes allowed me to center inserts perfectly to brackets. They would have been too tight for M8 bolts after painting so I decided to drill them afterwards to 1 mm oversize. I will powder coat both footpegs and brackets later once I have all the other parts such as side stand etc. ready for that as well.

Centering pedestal drilling machine with a countersink drill bit

Drilling with 8 mm...

...and 10 mm drill bits

Finishing with deburring tool

Chamfers done with belt sander


Securing parts together with a welding magnet

Outer corner tacked

Bracket fixed to a vice

Final bead

Footpeg fitted to bracket to help welding of the other side...

...and fixed to a vice

Both corners tacked...

...and welded after removing footpeg


Tools for drilling holes to frame for M8 inserts

Positions of right side holes marked...

...and drilled

Inserts positioned using bracket,
pieces of wooden planks and two clamps

Tacked in place...

...and fully welded

Right side footpeg assembly mocked up

Both footpegs in place

Cleaning areas near weld bead with Dremel

Drilling holes to 9 mm

Deburring

Footpeg brackets...

...and footpegs sand blasted and ready for powder coating later

Saturday, 30 May 2020

Race bikes @ MP 20 - 1st of February 2020 - Helsinki, Finland

Here's rest of photos I shot at MP20 motorcycle expo. Check out also my other MP20 photos showcasing Petrol Circus Custom Bike Show 😎

Ice One Racing Husqvarna FC 450 #7 Kimi Räikkönen