Starter turns but will not start, can smell fuel

Ok, I may cover stuff here you've already done. My assumption is that this is a push button starter. Does it have a Kick Starter?
What EXACTLY is it doing when you try to start it? This can give clues as to where the problem could be. Have you been having any other issues with the bike like lack of power, Bad gas mileage? Again that can give clues.
-Lazy turn over could be a battery issue. Bad batteries can hold full charge but don't have the actual force to turn the starter motor over, (Amp flow)>.
-Just spinning suggests No spark. 'Coughing' and trying suggests fuel supply issues.
Try checking the simple 'Silly' stuff like does the bike have a fuel valve on the tank, (a Petcock valve)? You may have turned it to the 'Off' position and forgotten to turn it back to the 'Open' position. Yes, I've done that!
-When was it last serviced? Dirty filters can cause bigger issues than you would expect.
I'm assuming your wife's bike still runs so it's unlikely to be wrong fuel.
When you say the spark plugs are "Dry" is this referring to the actual spark terminals inside the engine or just the outside of the engine. If you've cranked the engine the spark plugs should be wet and smell of fuel. Did you check All the spark plugs were generating a good, strong blue spark?
A lot of modern bikes now have electronics so it could also be something there. For this I would suggest you get a good bike mechanics opinion as they can physically look at the bike to see what it is or isn't doing.
Comment below and I'll see if I can help you more.

Could be water,put some line freeze ,change fuel filter.

follow this steps and fix it. God bless you

• Make sure the key and kill switch are both in the "on" position. Ensure that the proper starting procedures for your bike are followed. Is it in neutral? Clutch pulled in? Gas in the tank? Then try to start your bike. Does it turn over? If not, check to see that the battery is properly connected and the terminals are not corroded. If they're loose or dirty, clean and tighten them. Then, using a voltmeter that measures ac/dc and ohms, check to see that your battery has enough charge to crank the engine. If not, replace or charge your battery and try again. If it still doesn't turn over, there may be a loose connection between your battery and starter; a bad ignition or starter switchl or a bad safety relay. Check a repair manual for proper testing procedures for your bike, as each motorcycle differs.
• 2 If your bike turns over but doesn't catch, check to see that it's getting fuel. If the bike has a fuel petcock, make sure it is in the "on" (or, on certain bikes, "prime") position. Then remove the main fuel hose and check to see that fuel is flowing freely. If fuel isn't getting to the carburetor or injection system, your bike won't run. If that's the case, your problem is likely something in the fuel system. If fuel is flowing freely, reattach the lines. If it's not, check to see if the fuel filter is clogged, if a line is pinched or if the petcock is working properly. One way to determine if the problem is in your fuel system is to put a few drops of fresh gas into each spark-plug hole, replace the plugs and turn the bike over. If it starts and then quits, the problem is likely in the fuel system.
  
• 3 If you're getting fuel and the bike turns over but still doesn't catch or start, check the spark plug or plugs. Start by pulling off a spark plug wire, then removing a plug using the spark plug socket supplied in your bike's toolkit. Now inspect the plug. It should not be wet (usually caused by fuel, when the plug is not firing) or coated in carbon/burned oil deposits. Now check to see if the bike is getting spark. Although you can get a special, insulated set of pliers to hold the plug, there's a "quick and dirty" method for this: After reattaching the plug wire, lay the threaded part of the plug against the engine (not over the plug hole, as the spark could ignite any fuel that is blown out when you try to start it). Now, making sure you're not in contact with the engine or plug, hit the starter. You should see a nice blue spark. If you don't, make sure the threaded portion of the plug is touching the engine (but the electrode is not) and try again. If you still don't see a spark, you either have a bad plug or a problem with the electrical system. Check to see that all the ignition wires are properly connected and that you can't see any cracks in the wires. If the wires are cracked, they should be replaced. If you're still not getting spark, it's time to consult a repair manual or call a mechanic.
  
• 4 If you've got fuel and spark, ascertain that your bike is getting enough air. Start by pulling off the air filter. If it's too dirty, you won't get the proper mixture of air and fuel in the carburetor or injection system. If it's clean, check to see that the air box is properly connected-- a loose hose or air leak can feed too much air into the system. If your bike is equipped with a choke, ensure that it's able to move freely and is not stuck in the "on" or "off" position.
  
• 5 If you've followed these steps and still can't get your bike to run, call in an expert. If you think you've narrowed down the source of the problem, describe the steps you've taken to point the mechanic in the right direction.
  

If the engine doesn't turn over it is not a fuel issues as fuel will keep it from starting. However the engine will still turn over what is more likely is a starting system concern since it just clicks it is probably the starter or starter circuit. again the fuel pump cut off only turns off power to pump which will cut fuel.. engine will still crank.

-Check for spark and fuel.


mai

Dead fuel in the float bowls, turn fuel tap off get a piece of thin hose connect to the drain fitting on the float bowl release drain screw on the bottom of the carbs drain each carb, top gas up with good fuel turn tap on and your off.