== == standard spark plug: DR8ES-L Spark plug gap: 0.6 -0.7 mm (0.023 - 0.028 in)
tighthening torque: 20 Nm (14.5 ft-lb)
0.6-0.7 is your gap settings.
The correct spark plug for this motorcycle is: NGK D8EA
Try one off of a yamaha seca 400
try the yamaha seca store.
The spark plug gap on a 2000 Kodiak 400 is .024
ebay
Maxim 400
The spark plug gap for a Yamaha Big Bear 400 should be set at .024 inches. A new spark plug may be purchased at an auto parts store with the gap preset.
According to the Yamaha Parts Catalog online you need Yamaha Part # 94701-00333-00, SPARK PLUG NGK Standard DR8EA #7162 Gap .024 See Links. Hope This Helps.
It should be an 12N 12A-4A battery
Most of that older stuff was around 32 thou.
0,263 litre 10W30 oil
my manual for '82 seca 400 says "Periodic oil change: 2.2 liters / 2.3 us quart .... With oil filter replacement 2.5 liters / 2.6 us quart"