hi.

i have a xt600 -88 bike (with a K, xt600K, in my registration papers) the engine is a 2kf, it has kick start only and front and rear disc brakes. (although the rear end is maby changed to a newer model, but not sure)

it was running fine until a few weeks ago. i accelerated out of a crossing and when i reached about 80 km/t it suddenly started to make noises in the exhaust and died. I tried to kick it to start but no luck.

The next day i opened the carburetor and checked the main jets and nozzle. blowed them with compressed air and reinstalled. After a long time with kicking and sweating it ignited but only did a rev or two before it died again. I still thought it was a carburetor problem so i completely disassembled it, inspected and cleaned it. Ensuring every port on the carb. body was open and not clogged. Then reinstalled. No improvement.

So i then started to look at the el. system. since it actually fires but then dies again the kill swithes is working. I tested them seperately with a ohm meter just to be sure. I also checked the spark plug (tried with a new aswell) and lead. Meassured the ign. coil. All good.(new lead and cap aswell) The engine is generating power (got within Clymer manual limits just by kicking). The only problem i could find is the pickup-coil thats integrated with the alternator. The pickup-coil has over doubble amount of resistance as it should. As i understand it, the pickup-coil gives the rest of the ignition system the pulse at the right time to ignite the sparkplug.

a general bike engine knower said that a wery small blue spark indikates a weak spark. That the spark should be bold and be blue-yellow-ish...???

So i think the problem is my pickup coil?

the only thing i can ad to that is that when it rains sometimes it misses and i have to be careful with the throttle to make it home... (that was the reason for changing sparkplug, lead and cap and it did get better)

anyone have a suggestion/meaning to that?

thanx