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.
.025
The spark plug gap on a 2000 Kodiak 400 is .024
The correct spark plug for this motorcycle is: NGK D8EA
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.
Most of that older stuff was around 32 thou.
== == 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 oil capacity for the Yamaha Big Bear 400 is 3.2 quarts. It is recommended you use 10w30 oil in the Big Bear.
yamalube 10w30
it could be a bad spark plug wire or the plug could be gapped to much
on the left frame in front of the engine.
1999
3.2 quarts
.045