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What is the red spot for

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Laverda Dave:
I began the overhaul of the 400/4 front brake caliper yesterday. Once I finally got it apart and after having to reconnect the overhauled master cylinder to pump brake fluid as the grease gun/air combo method refused to even budge the pad/piston from the caliper the piston finally popped out and it was immaculate, not a mark on it! The cause of the huffing and puffing was the brake pad seizing in the caliper bore. I bought a new piston and seal kit for it months ago having experienced badly corroded pistons in the past so I'll fit these and keep the old one as a spare as you do!

A mystery needs solving though, can anyone advise why Honda put a red spot on the outside of the caliper, was it used in the production line to indicate the piston and seal had been fitted? I know Honda marked important parts with a blob of yellow paint to indicate they had been torque set but why the red spot?
The paint of the caliper body was almost unmarked under the 20+ years of storage dirt and rats droppings and I intend to keep the original paint complete with the red spot; I just wish I knew what the spot was for?

Nurse Julie:
As with all parts, Honda didn't make them Dave, so we think it was a sign from the brake manufacturer that the item has been tested 🤔🤔🤔🤔

haynes66:
the honda part number for those is 01-04-24

Orcade-Ian:

--- Quote from: haynes66 on February 24, 2024, 03:14:07 PM ---the honda part number for those is 01-04-24

--- End quote ---

You are over a month early with that one!

Ian

Rozabikes Tim:

--- Quote from: Laverda Dave on February 24, 2024, 02:47:37 PM ---I began the overhaul of the 400/4 front brake caliper yesterday. Once I finally got it apart and after having to reconnect the overhauled master cylinder to pump brake fluid as the grease gun/air combo method refused to even budge the pad/piston from the caliper the piston finally popped out and it was immaculate, not a mark on it! The cause of the huffing and puffing was the brake pad seizing in the caliper bore. I bought a new piston and seal kit for it months ago having experienced badly corroded pistons in the past so I'll fit these and keep the old one as a spare as you do!

A mystery needs solving though, can anyone advise why Honda put a red spot on the outside of the caliper, was it used in the production line to indicate the piston and seal had been fitted? I know Honda marked important parts with a blob of yellow paint to indicate they had been torque set but why the red spot?
The paint of the caliper body was almost unmarked under the 20+ years of storage dirt and rats droppings and I intend to keep the original paint complete with the red spot; I just wish I knew what the spot was for?

--- End quote ---

The red dot denotes upgraded part fitted to a red bike because as we know, they are so much  faster!😜

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