I've noticed with the cold weather lately that my '97 Yamaha XJ 600 will stall when I've been riding for a while in cold weather. When I start it it'll start fine and idle nicely at 1500rpm, then when I've been riding for 5-10 min it'll stall when I go to stop. Also at lower revs it kind of sounds more like a twin with a more rumbly exhaust tone, but only in cold weather after riding for a bit.
What could cause these problems? The plugs need replacing, which will happen on payday.
Bookmarks