1999 GXSR 600 will not run in cold

If it's 54 outside and the fan is not running because the cold air is passing through the radiator and the coolant is doing it's job. Then you come up on a red light and basically all of the sudden that 54 degree wind chill has somewhat stopped (because 54 degrees outside and going 50 mile per hour creates quite a wind chill) the engine will heat up, cause the thermostat to open allowing the fluid to flow through the system. Now the fan kicks in at 220 degrees and begins to cool everything back down or you start riding and the wind cools it back down again...........I hope this helps a little. My bike heats up quickly too especially after riding for awhile and then stopping at a red light. I flush my coolant system yearly before the winter. It's generally recommended every 2 years.Ref: https://www.gixxer.com/forums/80-06-07-gsx-r600-750/294175-rapid-heating-idle.html

The stator is probably it..I had the same problem...After you change it the bike will run so much better. That's why it ran good with the new battery...Then it started draining it..It takes a special tool to get it out..

i have a gxsr srad 600 99 that only stalls when i get to 80 miles to the gallon when my tank is full i have no problems only happens when my tank gets low any help

Hot climate, warm weather, long distance riding 20w-50 is a great choice. Cold climate 10w-40 might work better. Use only a JASO MA certified motorcycle oil . Synthetics will help your bike run cooler and shift easier.

Stock thermostat is probably 180, but could be up to 190 at times. Some bikes even run as hot as 200 or so, all depends on the type of riding you do, the outside temperature, and your speed.

Don't be concerned at less than 220 unless it's up there for extended periods, or if it stays below 170 for a long time and seems to be running differently.

try draining your fuel tank and running it with fresh gas.

it sounds like one of your sparkplug leads is breaking down under load,or it could be the cap,check all the sparkplug caps are tight on the leads,if it is not the caps or the leads it could be one of the coils,hope this helps

The best help I can give you is a free factory service manual. There will be a troubleshooting section in the book that should be of help. You have fuel injection and I am a "carbs only" man. Go to the site below and download the free manual. Yours is the 43rd from the top of the Suzuki section.

http://www.carlsalter.com/motorcycle-manuals.asp

Now you can do a whole lot more on your bike.
Please rate this answer. Thanks fieldsry!

Check the tank for water or crud. Also drain the carbs to make sure the floats aren't obstructed.