2.3 qts. If your temperature while riding doesn't reach lower than 40F use 20w50 If it doesn't get any warmer than 60F use 10w40 both type "se" motor oil
If there is one it will be located from the main fuel line running from the petcock to the carbs.
Maxim 400
82.00 HP (59.9 kW)) @ 9000 RPM
try the yamaha seca store.
0,263 litre 10W30 oil
Try one off of a yamaha seca 400
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.
2.3 qts. If your temperature while riding doesn't reach lower than 40F use 20w50 If it doesn't get any warmer than 60F use 10w40 both type "se" motor oil
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.