
The parts have arrived, so let’s continue.

Well, we could just keep two keys and use them as is, but…
Carrying two keys feels wasteful. Let’s transplant the cylinder.

The bottom is a lock plate held in place by spring tension. Push it in and pull, and it slides right out.

I polished it a bit and swapped them over.

We’ll replace the petcock with a new one too. Let’s clean the surface first before assembly.

A copper gasket on the flange cap is the safe choice.

The sensor is dead, so I cut it out.

It’s dirty, so let’s polish and install it.

The chain and sprocket replacement is complete. I’ll check the inner width and set it to a close value.

This year model uses two beta pins. With the 1200 series, it becomes a slightly more convenient pin, so I’ll use that.

Continuing with Deco-mainte. The pedal is stiff too. Since it’s treated with Teflon, it works fine without lubrication. If there’s oil, it provides rust protection, so let’s apply some.

Brembo levers rust easily, but this one looks pretty good. After polishing, there’s minimal play, so I reused it.

The filter turns pitch black the moment you put it in. It must not have been cleaned in ages.

The throttle is… round? That’s unusual.

First time seeing one.




That’s a pretty old holder. There’s no OFF stopper, so I added one.
With a stopper, you get a solid “click!” when you turn it OFF. Plus, the throttle play is no longer just balanced by return spring, so the feel improves.

The tank rust was severe, so let’s check the carburettor too.

At first glance, it looks pretty rough.

There was a suspicious smell, and I was right—three out of four are broken.

While I had them out,

I polished them. I think they’ll resist corrosion better than buffing.

There was some powder rust inside.

I’ll just replace the O-ring on the float valve. If we replace that, we shouldn’t get overflow.

Let’s feel the rubber elasticity of the taper and check it. Anything too hard gets rejected.

After that, check if the rear pin springs back, and we’re good.

JR9B, huh? I’ll drop the heat range to JR8B.

The stand was pretty sticky too.

We’ll replace the fluid and call it a day.
