Hey everyone!
So i am having issuess with a 110 that sat for awhile. I planned to replace the carb since I have had issues with the stock on others. I did that after making sure all gas was drained out. Checked spark and it looks solid. Compression feels strong but it will not even attempt to pop over. I have tried spraying starting fluid in the carb and spark plug hole. Still nothing not even a attempt to sputter. I find that odd as I would think I would get something with the spark. I have made sure the switch is in on position and gas is flowing to the carb. Any ideas? Thanks

 

Check compression. With a bike that has stood for a while valves or piston rings could be sticking and, if you got the bike as a none runner, the bores could be worn or have other problems affecting compression. Change the plug too, they can be duds, even though they show a spark. The air/fuel ratio has to be fairly close to right, too much or too little and the engine won't start, so adding starting fluid to an already rich mixture would not result in it firing

 

Hey Merryman! Thanks for all the suggestions and help it is greatly appreciated. So i got a compression tester and you are correct it is only hitting 30psi. What are my options now? Thanks

 

Check valve clearances, they may just have closed up. If one is massive though, that valve is stuck open. For this I put a screwdriver blade in the gap and tun the crank round by hand until the rocker starts opening the valve further, pull screwdriver out and the valve usually springs back to hit the rocker. For stuck rings, you can squirt a small amount of oil through the plug hole, not too much or it will "oil the plug" this works better on vertical piston engines, but may seal the bore enough to raise the compression and get it to start. Once running, stuck rings tend to free off. If these tricks don't work, take the head and cylinder off, free valves by hand and check rings and bore for wear. Grind valves in before refitting head.