Jeremy Corbin
XS400 Member
It looks like I didn't clean my carbs out soon enough when I started to have issues and now my '82 XS400 Seca will only start if I remove the airbox and cover up one of the carb intakes. I can cover up either one and the bike will start.
I've cleaned out the carbs 3 times already. (I've heard "3rd time is the charm")
Air, Pilots, and Mains are clean. (Soaked in Alcohol and blown through with carb cleaner. Blown through again once installed.)
Pilot jet is set to 3-1/2 turns out. (Was 2-1/2 until 3rd cleaning)
Pilot jets are both 42.5 (though LH is the holey one and the RH is solid)
Main jets are 127.5 and 117.5 (LH,RH)
Chokes are clean.
Floats are level and to the book.
No mods to intake or exhaust... totally stock. I didn't even rejet anything.
LH Spark plug is usually black. RH is usually Ash-colored with black around the outside.
I've never changed the plugs or wires, though I have brushed the plugs; no change.
It has run progressively better each time that I've cleaned it, but will only start when I do the "Indian Trick" from The World's Fastest Indian. (At the 0:25 mark)
After she fires up and gets warm, she restarts easily... even hours later. Once she cools off overnight it's back to the carb trick again. I've been tempted to leave the intakes off, but since dust could get in I really don't want to do that.
Since I know that seeing and hearing are better than words:
I've cleaned out the carbs 3 times already. (I've heard "3rd time is the charm")
Air, Pilots, and Mains are clean. (Soaked in Alcohol and blown through with carb cleaner. Blown through again once installed.)
Pilot jet is set to 3-1/2 turns out. (Was 2-1/2 until 3rd cleaning)
Pilot jets are both 42.5 (though LH is the holey one and the RH is solid)
Main jets are 127.5 and 117.5 (LH,RH)
Chokes are clean.
Floats are level and to the book.
No mods to intake or exhaust... totally stock. I didn't even rejet anything.
LH Spark plug is usually black. RH is usually Ash-colored with black around the outside.
I've never changed the plugs or wires, though I have brushed the plugs; no change.
It has run progressively better each time that I've cleaned it, but will only start when I do the "Indian Trick" from The World's Fastest Indian. (At the 0:25 mark)
After she fires up and gets warm, she restarts easily... even hours later. Once she cools off overnight it's back to the carb trick again. I've been tempted to leave the intakes off, but since dust could get in I really don't want to do that.
Since I know that seeing and hearing are better than words: