I got my tw200 last year to learn and have fun on both the street and the trails. Its a 1998 model. It worked fine for about 2 weeks after i got it, after that its been constantly losing power, at all speeds, but really noticeable at highway speeds, i'll be doing 90 with the ability to take it up to 100 (Maybe a little more) but all of a sudden it will cut the speed down to 80 or less, sometimes I have to give it everything it has just to keep it at 80... Sometimes it will bog down to 80 for 10 seconds then fire back up to 90, sometimes it will stay at 80 for 10 mins... Sometimes it starts with this slow issue then clears up for a bit, sometimes it starts perfect then starts slowing down after a bit of riding.... getting scary to drive now. Got this thing for its ruggedness, but its been nothing but problems for me. I've changed Coil, Spark, Pulled off Carb (Like Brand New), Tightened Chain, Checked fuel flow from tank. Screen On Tank. Bikes in very good shape, I want to fix this but seems like im changing everything on the bike, now im looking at a new battery (sometimes this causes issues even though It can start itself on battery. Im assuming its the original battery) or the Cdi box. Would like to buy another bike next year (never buying used again, what a nightmare this has been) and not sure if trying to fix this is even worth it. Anyone have this issue before... ive searched the forums, im down to the battery/cdi. All I want to do is ride my bike but at the same time I dont... this really really sucks. Had to be my first bike, i never seem to catch a break. Can't even do my M test next year unless this is fixed. I want to take it to a shop but whats that gonna end up costing me? & If I get a crappy shop nothings gonna get fixed anyway. Would they be able to do tests on any of this stuff, or will they just be part swapping like me? Cause I can do that myself.