
RVF400—looking back now, I wish I hadn’t sold it. I think it’s a size that fits the Japanese body frame perfectly.
Inspection, carburettor maintenance, chain and sprocket replacement, and spark plug replacement were requested.

The old chain and sprocket—quite the veteran. The wear was moderate.

DID Gold plus Sunstar is the proven combo. Always replace the lock nuts.

Raise the side stand and it goes “clang!” I bent an SS400 into an L shape and tack-welded it to avoid contact—gently with the foot, which seems like wasted motion. You can also remove the stopper entirely.


That’s how it turned out. Next:

The failure case. If you go about it too carelessly, you’ll usually fail.

I pushed the clearance too hard and it wouldn’t fit—turned into scrap.
Time to reset my approach:

A two-piece design that won’t fail. It’s not HL, but it is SUS304 stainless—rest assured.

It goes in from the top, so it’s very convenient. As for waterproofing—I’ll need to study that further.

Probably overcharged. Corrosion has set in and the bolts won’t budge anymore—if I go full power, the terminal might snap off. I’ve lubricated it well, so I’m counting on good results going forward.

The reservoir return line was severely degraded. I cut it and shortened it. Going forward, the coolant lines should be replaced if parts become available.

After topping up the coolant, I marked it so it can be erased. Being able to see changes will be better for the future.


I replaced the air filter too.
Spark plugs have been replaced as well. The front bank number four—it’s so tedious I’d like to make a special tool for it.
