Inazuma 1200 Rearset Modification | Dramatically Improve Shift Feel with Shift Rod and Pillow Ball Replacement

A rearset kit with steps angled this much is extremely rare.
When angled, you naturally push at an angle, which isn’t ideal.

Let’s do some modifications to improve the shift feel.

Maintenance log for this article

Vehicle: SUZUKI GSX1200 (Inazuma 1200)

Symptoms: Shift operation on the rearset feels off (play, difficulty engaging).

Work performed:

  • Parts replacement: Replaced the worn pillow ball (rod end) on the shift rod with a new one.
  • Layout adjustment: Reviewed and optimized the link ratio and angle on both the arm and pedal sides for smooth force transmission.

Result: Play is gone, and gears now engage smoothly with a satisfying feel.

Another blog by Decoboco.
“RURAL GARAGE


A hidden room for non-motorcycle topics.
Sharing convenient everyday items, relocation, delicious food, life philosophy and more.

←click

J・TRIP OFFICIAL online shop
¥38,500 (2026/09/21 07:35時点 | 楽天市場調べ)
ハセガワ(Hasegawa)
¥1,070 (2026/09/20 16:33時点 | Amazon調べ)

Remove the original shift pillow ball.

It’s crimped onto the shift arm, so let’s grind off the crimp and drive it out.
Drilling a hole at the center of the press pin makes removal easier.

By the way, the shift arm side uses a right-hand thread.

Using a tangless helicoil to create M6 threads in the arm

Since we absolutely don’t want it to fall out, “I’m creating threads in the shift arm.”
Plus, using a lock nut creates a double-lock, so it’s even more secure.

Tangless helicoil should be adopted urgently

The stress of insertion is greatly reduced.
The beauty of this product is that there’s no way to fail, and you don’t even need to break off and retrieve the tang.
You save two or three steps of work.
Honestly, there are only benefits.

M10 x 1.25 is not available.
Probably something that amazes everyone.

Accurate(アキュレイト)
¥13,167 (2026/09/20 20:33時点 | Amazon調べ)
Accurate(アキュレイト)
¥13,167 (2026/09/20 20:33時点 | Amazon調べ)

Standing perpendicular to the seating surface… honestly, I live every day with no sense of aim (*´ω`*)
*This is an M6 helicoil tap.

Offset collar ground and TIG welded into one piece

Prepare a full bevel and weld them together.
Make it as solid as possible! Since the offset is large, I combined them.

Quick coat with gun coat, bake it, and done (*´ω`*)

This is the limit due to clearance issues

We could push the rearset kit collar further, but… there are issues that come with it, so after considering everything, this is good enough.

We’ve also shortened the shift rod itself.
It’s safer not to expose too much of the threaded portion of the shift rod.

They break surprisingly often, so excessive length and angling are things to watch out for.

On the pedal side, we could use ultra-low-head bolts to tighten things up, but… the threaded portion of the pedal is a blind hole.

If it went all the way through, we could use ultra-low-head bolts plus a lock nut for peace of mind,
but in this configuration, we need a bolt that can be tightened securely.

It continues a bit more from here.

Title: Improving Shift Feel on Inazuma 1200 Aftermarket Rearsets. Problem: The gear shift lever felt loose and notchy due to worn components and poor linkage geometry. Work Performed:

Parts Replacement: Replaced the worn-out Pillow Balls (Rod Ends) on the shift rod to eliminate play.

Adjustment: Optimized the shift linkage angle and leverage ratio for smoother operation. Result: The shifting feel is now precise and smooth, significantly improving the ride quality.

  • Copied the URL !