Follow the cable down to a reservoir adjacent to the steering head.
Behind the headlight bucket. It's a remote reservoir and a pain in the neck to clean out, work on.
try the yamaha seca store.
Try one off of a yamaha seca 400
remove the seat scoot the gas tank toward the rear and its a little black box with an Allen wrench cap(be carefull not to strip the cap as it is made of plastic and will strip easilly)
it's behind the right suspension bar. it's a black allen tip.
what fuse for brake light seca
ebay
Yes, a round headlight will fit on a Yamaha Seca. Just be sure that the model and specifications match what will fit into the mounting brackets.
81hp
2
The spark plug gap in a Yamaha Seca is 1/2. It can be easily obtained and is very affordable and likely to be replaced by the owner. It is a quick replacement.
There is NO WAY a stock Seca 2 will do 140. About 115-120, which isn't bad.