Suzuki ltr450 trouble with getting it to start

[Peck]

having trouble with getting it to start .  where should i start my trouble shooting

[Mech]

Probably best if you tell us more about it..  Like what you've tried and what's happening. Any observations..

[Curtis Underwood]

Here is a guide I use to find out just where to start looking. The first thing I do spray a small amount of starting fluid in carb and turn over if it starts and run for a few seconds then ignition system is good.
If it dies right out then you have one of several things wrong. Remove fuel line from carb and turn on fuel valve if you have fuel flow out of the line, then it is in the carburetor. Remove carburetor and clean. When you remove the carb bowl look at the needle vale and see if it moves when the float moves it it does not then it is a stuck needle and the carburetor will most likely have to be rebuilt or replaced but if it moves a good cleaning might fix it.
If spraying starting fluid did not give a short engine start then the ignition system is the problem.
Chek in this order.
1. Spark plug (I usually replace it)
2. Check coil using the service manual procedures.
3. Check ignition switch (have had a few of them not open the kill contact when it is turned on)
4. There could be a wiring problem with the kill portion of the wiring. What I do is goto the CDI and find out which wire grounds out to kill it and check to make sure it is not grounded with the switch on. There is on some machines a safety kill switch on the handlebar this also can short out causing it not to start (witch is a part of the kill grounding circuit.). Last thing is to replace the CDI unit.