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lowest possible point on the engine
20/50 w Yama oil is what i use
it has two 40mm hitachi carburettors i have an old junker i restored and i have learned a lot about them
There should be a diagram of the vacuum lines on the passenger side shock tower.
You can find a 1986 Winnebago, with the Chevrolet 454 cubic engine, vacuum routing diagram at most Chevrolet dealerships. The vacuum routing diagram can also be found in most Chevrolet engine service manuals.
You can find the 1986 Chevrolet vacuum line diagram at most Chevrolet dealerships. The vacuum line diagram can also be found at most auto-parts stores.
the diagram you are looking for is on the fan guard connected to your radiator
Chiltons service manual
usually there is i sticker on the core support showing the vacuum diagram. If its not there then i would spend 20 bucks on a chiltons manual.
http://www.yamahaoftroy.com/fiche_select2.asp?category=Motorcycles&make=Yamaha&year=1986&fveh=162
There should be a diagram of the vacuum lines on the passenger side shock tower.
Depends on the tempature, but I use Castrol GTX 20/w50 Racing Oil under most conditions.