Trying to figure out some jetting problems with my Ktm 525sx.
I am not sure if I should buy a whole kit or just a main jet and maybe a pilot jet.
The issue is the bike starts easy with no choke , backfires on decel and is hard to start when hot (it helps if I turn of the fuel).
Basically the choke and hot start are no help at all.
I think it is stock with maybe the pipe opened up a bit (spark arrestor removed).
The plug is a dark brown which I think is good but having to shut off fuel to get it to start hot is confusing me especially when I was thinking it needs more fuel to get rid of the popping and running hot.
I tried opening the a/f mix from 2 to 2 & 3/4 but not much difference.
Considering a jet is worth $10 and a kit is $75 I was thinking I might go up a few sizes and see how that works.