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Remove the dipstick and blow compressed air in crankcase while sealing it with a rag and pinching the vent hose with pliers. It will push the pushrod right out of there.
The spring is off of the old seal. Use the long rod and a small magnet to remove the extra ball. I used a drill bit turned by hand with vice grips to remove the bushing. I think Mikes has instructions on that. Remove the chain to properly install the seal.
I think we're working way to hard here. The procedure you saw in the video was given to me at a Yamaha Service Seminar between 1978 and 80. The procedure covered a valve noise in the shim over bucket 1977 XS750D due to loose manufacturing tolerances in the cam grind. The loosest point in...
Use Yamaha dip carb cleaner, part # ACC-CARBC-LE-NR available at any Yamaha dealer. Mix it with 2 parts water and store it in a sturdy plastic jug for future use. This stuff will not hurt your rubber and plastic parts and will melt away varnish and stale fuel residue in a couple of hours.
One...
It's located on the bottom of the switch. It will be a letter followed by a 5 digit number. They can be very hard to see and usually requires removal of the switch, at least for my weak eyes. Ebay #390390401054
These coils are great. They have a super hot spark and will fit under the tank if you are not faint of heart. I run them on my 270 re-phase with points.
On the 76 model the yellow goes to a relay that prevents the starter from engaging while the engine is running. On later models it also switched the head light on. Keep your yellow wire.