Bike will not start

SOURCE: rebuilt carbs-starts and idles but wont rev up without choke on

sounds like the main jets are partly pluged, you must remve all brass jets and seats including needle jet and its slide soak in carb cleaner and blow out with compressed air only.. hold up to bright light to verify if all are clean. jim

SOURCE: the engine turns over and everything but it wont start. no spark

I assume you got this fixed; sounds like it wasn't getting gas to the carbs. Some people don't realize the 99-02 SV650 has a vacuum-actuated fuel pump, and sometimes it can get stuck. Mine has had this problem, and it took me a while to determine it was the problem. I would guess it only happens after the bike has been sitting a while.

Best way to check it is to lift the tank (it's bolted to the frame on the right side of the engine just under the tank). Unplug the line toward the front of the motorcycle from the fuel pump, and connect some spare fuel hose to it running to a can next to the bike (don't want to get gas everywhere!). With everything else still connected, crank the bike for a short period to see if any fuel comes out (shouldn't take long). If not, then move backward and ensure fuel will flow from the vacuum-petcock when the bike is cranked. If that does work, your fuel pump needs some work. I was able to take mine apart and unstick it.

SOURCE: 1981 suzuki gs550l wont start, rebuilt carbs, new plugs, new bat

did you adjust the iddle screws? Those black plugs need to be installed. Those carbs pull all gas threw the main jets. If you remove the black plug and look closely you will see a small tunnel going from that tube to the main jet tub. The fuel gets pulled threw that tiny hole from the main tube. (This also puzzled me the first time I saw one, don't worry, that was the first thing I thought of doing also, but since then, I have found tons of bikes and boats like this) I found mine runs best on 2-1/2 turns on the idle screws. Also try sincronizing you carbs, the cheep way to do this is by blocking them open slightly and checking the butterflies with a feeler gauge to see if they all open the same amount. I also found that sometimes it could be as simple as the choke slide not returning completely back to the proper position, this will cause the diaphrams to not operate properly. Good luck and hope I helped a little.

SOURCE: suzuki gn125 wont start. checked carb, cdi, coil.

Check the valve adjustment. If a valve is standing open just a little, the compression will be too low to start the engine. Check fuel delivery by dribbling a little gasoline into the carb and try starting the bike. If it starts and runs for a second or two, you're not getting fuel into the cylinders. Check you carb again.

SOURCE: Loud tick noise in crankcase.

Thanks for the background info. With all the work that has been done and the good readings I can suggest a few possibilities.

1. A broken gear tooth, (highly likely if the "tick" is not present in all gears).
2. Broken gear tooth on the clutch hub, (highly likely if the "tick" is present in all gears).
3. Wrong heat range on the spark plug causing detonation.