Hi guys, I’ve read through a ton of posts before putting this up, so please don’t put me I front of the firing squad just yet!

I picked up a 2004 Sportsman 700 Carb model for putting around with the kids and had intentions of plowing with it this winter. I gave it a good look over when I got it home, gave it all new filters, oil, some grease and Headed out for a short ride. After about 20 min in, it started sputtering, had power loss, then turned to backfiring and died. Also it used way more fuel than I would’ve thought it should have, nearly 1/3 of a tank!
So I’m a research guy, I’ve seen all the posts by the late OTP. A lot of them point fingers at the Ducati ignition. So after reading a handful of posts where the Kokusan replaces the Ducati electrical “upgrade” And solves this EXACT problem. However.. when I popped the cover off the front compartment, it already had the Kokusan components. So I pulled connections, cleaned them up, gave them a dab of dielectric grease and made sure they were all back together correctly. It just baffles me that at start up through the warm up period, it runs amazing. Then as soon as you think, hey maybe I fixed it, it then starts loosing power nd back firing again.
Has anyone had all this happen AFTER the Kokusan components were installed?

Thanks

 

just to rule it out and a good check anyways. make sure you have a 1/8" gap in the etc as if it's too tight it makes the override kick in and act the same you describe. most likely not the issue, but i have heard of it. also check the simple things like a blocked fuel vents, air intakes are clear. my 2 800's were very hard on gas(8 miles per gallon) depending on how you drove it. assuming you already checked/replaced the spark plug.