My xs 400 won't start

[Bnelson07]

My xs 400 won’t start. I’ve done a carb rebuild, changed the timing, checked spark, etc. everything is fine but the cylinders are dry when I check them after kicking it over 10+ times and the carbs are always full of gas. Has anyone else had this problem? And how can I fix it or find out what’s wrong?

 

[CaptChrome]

If you are certain that you have spark at the correct time and that fuel is flowing, then all that remains is compression. Have you done a compression test and have you checked/adjusted the valve lash at all?

 

[JPaganel]

Compression test is a good idea.

Also, I would verify cylinders are actually dry. Crank it with plugs out and see if any gas comes out. If they are truly dry, you might have made a mistake when cleaning carbs.

How are your float levels?