i agree with what mucky said
i had a similar experience last spring , quad sat for 3 months waiting for spring , did not want
to start, gave it a shot of go go juice , took right of. i imagine I'll have to do the same thing this spring.

 

thats what i had misadjusted valves. the only time i could start it is when i drift started it. after i adjusted my valves it started easy and had double the power. No exagertion!

 

Valve adjustment would be what I'd check first as well. It's so much more important than people think. And, it's pretty easy to check, compared to electrical problems....

Electrical problems? But I have spark.

Yeah, but if you've ever followed someone on the road and when they put on their brakes, their tail lights change, or when they turn on their turn signal, the opposite brake light dims, you've seen a grounding problem first-hand. You might be getting spark, but not at the right time. It's only slightly possible that the load from your starter is causing your ignition module to partially fault, or your spark could be too weak. Obviously, there's no starter load when you push start it, so the ignition is fine.

There's my 'alternate idea' in case none of the other, more legitimate, ideas pan out.

 

Valves? do you mean to tell me the valves will go out of ajustment if you dont run the quad for two months ?
i think mucky has a better handle on this one. the carb had no gas in it. no gas no start

 

Nope the valves dont change the clearance by just sitting there, but they slowly loose their clearance over time. During the summer warm months, compression loss is more tolerable than when the weather gets cold, and you need all the compression a motor can deliver. The valves probably tightened up over the last few rides, and now that its much colder, the compression loss is too much, for starting.This is a very common issue on this motor, and the intake clearance should be the first thing to check.
It wouldnt be a no gas situation..or it wouldnt start by bump starting either.

 

mucky
now i under stand your avatar.

 

thats me most of the time, pounding my head on the keyboard, the problem to me still sounds like a carb problem, plugged jet?
now Im having problems with mine not running right, carb needs to be removed and have it cleaned and rebuilt, it sat for 2 months and now it runs like crap from the old gas, went to glamis for a 1 day turn around and all it wanted to do was spit and sputter and cutting out on me so I feel you pain when it comes to not running right

 

wow, I remember him saying "if i push start it it fires right up with no problem and runs good " but that's just me.

hard to do that with a carb problem, huh?

 

So I have a Suzuki ltz400 that won't turn over at all when I hit the start button it won't even make noise when turning it over. But if I bump start it. it turns on right away and when you run it for 10 minutes and try to start it with the button it still doesn't want to start what's wrong with it please help