Shuts down when put in 1st gear

SOURCE: Idling problems with 2007 GSXR 600

check fuel switch, is it on? most times the fuel from the last ride that wasnt used collects in the fuel bulbs, and gets used first, but after that no fuel no go!

SOURCE: FXR suzuki 150 will idle but wont rev

Clean the fuel tank, fuel hose and fuel valve.

SOURCE: 83 suziki GS450 idle issues

the problem with the rubber was close but on the gs450 there is a metal insert that even if the rubber was rotted away the metal seals aginst the head so it cant leak. the problem is on the gs 450 suzuki used a cheap throttle cable that kinks behind the gas tank and kinks at the bend to the crabs under the set and the throttle system is a pull only not a dual cable pull push to always close the throttle. if you start the bike a wiggle the bend in the cable that comes out from the twist grip you will see it changes the idle. with either your finger or a screw driver and push the plate down on the carbs that the cable connects too. if the idle drops this conforms your problem. order a new cable from dennis kirk they have the revised one that has metal adjustment screw and metal clip in. better jacket casing as well.

SOURCE: 02 GSXR Limits to 4800rpm, drops to idle, when warm not cold.

If you have the stock computer replace the power commander with the stock computer then see if the problem still remains. If it goes you can be sure the problem lies within your commander and it will need to be remapped or replaced...Good luck

SOURCE: my bike shuts off at the stop sign and red light

Check fuel filter and drain carb bowls. It sounds like water or debris, shutting you down.