My '97 yzf 600r will start but won't keep going

SOURCE: 1997 yamaha yzf 600r electrical problems

a jump box is nothing more then a battery with leads on it so where are you connecting it verses the new battery you put in the bike. that doesn't make since unless you are connecting the box right to the starter motor then it be constently running the motor untill you unhooked it. check all your fuses and examine all wire harnesses for damage, burns, or any mellting.

SOURCE: crank no start yzf 600r

Inject some carb cleaner spray through the opened air filter while cranking.
Spark plugs work? timing on the camshafts ok?
Crank it without turning the throttle on.
Pull the choke cable if you need to.
It should fire up without throttle.
Use the carb cleaner spray to help it (don't spray too much.It will backfire from the carbs).

SOURCE: 2000 yamaha YZF 600r wouldnt start

i suspect the battery is problem.Also you may have an electric fuel pump that is acting up.

SOURCE: 98 yzf 600R..Right fork leaking. Problem and fix?

it sounds like your fork seal has failed,it wont affect your brakes but will make your front suspension feel a wee bit "soggy"and will affect your handling,i would suggest getting the seal replaced as evetually the oil from the faulty seal will contaminate your brake pads that will affect your braking performance,replacing the seal,sooner rather than later ,would be a wise move..hope this helps...cheers

SOURCE: changing battery

Check your rectifier. Follow alternator wire, you will find a small probably square device. isolate it. Test it with diode checker or ohm meter. electric should pass one way but not the other. There will probably be two diodes in the device - one or both could be shorted (pass either way or neither way) Id check it before plunking down the $ for a new one. Could be your alternator is not putting out. Is your battery fully charged? No power into the alternator = no power out of the alternator. Alternator shorted - well time for a new one. Though this is not the weak link in a charging system. Could remorely be the voltage regulator ... still id look ata the rectifier.