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.
The gas tank for a 1986 Yamaha Virago XV700 is generally compatible with several models from the Virago lineup produced during the mid-1980s. Specifically, the gas tanks from the 1984 to 1986 XV700 and XV750 models can be interchangeable. However, it’s always advisable to check for specific mounting points and fitment details to ensure compatibility.
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
On a 1986 Yamaha Virago 1100, the fuse box is typically located under the seat. To access it, you will need to remove the seat by unscrewing the bolts that hold it in place. Once the seat is removed, the fuse box can be found near the battery, usually covered by a protective cover. Always consult the owner's manual for specific details and diagrams.
http://www.yamahaoftroy.com/fiche_select2.asp?category=Motorcycles&make=Yamaha&year=1986&fveh=162
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.