Tuesday, March 31, 2026

Yagi Maintenance

Since I'm home for a bit, it was time to do some maintenance on Yagi, my Yamaha TW200 DualSport.

I replaced both the front and rear sprockets, managing to break both mounting bolts on the front sprocket while torquing to spec!  I'm guessing it was time to replace them too huh, luckily the local hardware store had same and they didn't break during torquing actions.

The rear tire was exhibiting a small cracks caused by age and weather so it got replaced along with a new inner tube that has that slime sealant already inside, put in by the tire mounting guy at the local motorcycle shop.

The chain was also replaced.  I don't do this often so the operation was a bit time consuming since there's a specific order in which one installs a chain and the rear wheel but in the end I got it.  Some YouTube research led to the technique of using a nut and a c-clamp to help press in the new master link plates together so the clip can be mounted:

The oil and oil filter was changed as it was due since Yagi has reached 24,000 miles.

I checked Yagi's valve clearances and they were spot on!  The intake was at .003" which is midpoint of the range spec.  The exhaust valve was at .005" which also is in the middle of the spec.

Bought a stubby 1/4" drive 5mm Allen socket for the torque wrench tightening spec of 10 newton meters.  Regular sockets are too long you see, given the closeness of the valve covers too the motorcycle's frame at different points.  Now, no problems!

A neighborhood friend noticed the bolt that covers the access port to the automatic cam tensioner was missing, no idea for how long, and it was replaced.  It kind of functions as a dust cover.

Same friend noticed slight seepage on the right side of engine cylinder's base and I tried to tighten the relevant boltss, but they're on tight.  Probably requires new gasket for base of cylinder head ... Don't think I'll be doing that anytime soon.  Yagi is 20 years old, I'll live with the seepage.

The last maintenance is replacing the right fork's seals as they've been seeping for a few months now.  

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