Starts fine. sounds fine but dies upon putting it in gear

The most likely thing is a sticking clutch. With the ignition off, can you drop it into second gear and push it with the clutch pulled in? You say you put 'new petrol' in, so it sounds like it has been stored for a while. Clutches will often stick as the clutch plates have been under pressure for so long. Fully warm the engine before moving off until the plates free up.

And it looks like you probably mean VS1400 not VS400!

There is help here

https://www.google.com/search?q=suzuki+intruder+vs1400+stalls+when+put+in+gear

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Check the kick stand switch it has a safety feature when you put the kick stand down in gear it shuts off

Hi Darrell it sounds like the side stand switch is sticking. Give a squirt of wd40 and push switch in and out a few times that should sort the problem out.

POSSIBLE RUNNING TOO RICH AND IDLED TO LOW

when i shut off my 2002 suzuki motorcyle it run perfect then went to start i and have no power battery good have no light on dash no head light brrake light everything is dead what could be wrong can you help with a idea thank you dave

If your side stand is down the safety switch will kill the motor when you put it in gear. On Suzuki's you need to have your stand up to keep the engine from killing when you put it in gear. If this is not the case, you may have a problem related to the side stand kill switch . I would start my investigation there.

loose or broken ground wire ,could be broke under insulation, vibration of motor makes it lose contact. probably on gear indicator switch.