Yzf 600r vacuum lines how to hook up - 1998 Yamaha YZF 600 R thunder cat

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: 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: Carb Sync on an 01 YZF 600R

Here is a diagram showing the tubes you connect your vacuum gauges to.
http://216.37.204.203/Yamaha_OEM/YamahaMC.asp?Type=13&A=326&B=11
The YZF600R is carbureted, so I do not know what you mean by throttle body adjustments.
Synchronizing carburetors means adjusting the throttle plates (butterflies) so that all cylinders are drawing the same amount of vacuum.
Here is a diagram of the carbs. Screw #31 is the screw used to change the sync.
http://216.37.204.203/Yamaha_OEM/YamahaMC.asp?Type=13&A=326&B=13
Remember one other key point, all carbs are sync'ed to the #3 carb. You cannot change the vacuum (directly) on #3. It is usually best to start by syncing #2 to #3, then #4, then #1. Changing #2 can affect the sync on #1 so you definitely want to do 1 after 2 no matter what. If you have one cylinder WAY out of sync, that would be an exception to the previous rule where you would want to attempt to get that cylinder in the ball park of the others before fine tuning each cylinder.
Syncing the carbs is an alternating process between adjusting the vacuum then adjusting the idle. If they were out of sync, bringing them back in, or even getting close, can cause the idle to raise because the engine isn't fighting itself anymore. Always keep the engine idling @ 1100 rpm's while syncing.

SOURCE: only idle with choke on

Sounds like you have blocked or partially blocked pilot jets,
this can happen if bike has been sitting anf fuel has gone stale in bowls or contaminated fuel in tank.
hopefully bike if well serviced or could be caused by air leaks or even tight inlet valve clearance if bike has done a lot of miles