Week spark want start hows it caused - 2000 Harley Davidson XLH Sportster 883 Hugger

have you checked the timing belt for broken

Check the fuel pressure and make sure there is spark to the plugs.

You can just Google how to do those two things and find the answer.

Check...
Battery
Points
Coil
Magneto
Ignition switch
Kill switch
Neutral safety switch

On Chrysler products, the first thing you check is the ASD relay to see if it is working. It powers several things including the coil and injectors on some models.
No spark can be caused by not having power to the coil, or signals from the cam and crank sensors.

The engine could have jumped time, or you could have moisture inside the distributor cap.

please change the spark plug first as its life is over...dont listen to the mechanic and the battery should be in good condition

is it gettin proper compression-may want to testit--carb may be dirty or need ajust--chec plug and wires for wear and make sure battery is at 12.6 volts-any thing below can cause hard or nostart

If the plug is wet, have you checked to see if you are getting spark? I will assume (something I hate to do) for the sake of argument, that you do have spark. If you have gas and spark then the next place I would check would be the spark arrestor/exhaust port. Make sure it is clear of carbon build-up. It has to be some sort of compression problem, I would think, and that would be a place to start. Hope this helped and let me know how it goes! Best wishes.

youre p0300 code is radom miss fire,usually cause by bad wires or bad coil pack,p0304 indicates missfire at cylinder 4,cause bad wire or plug.p0335 indicates crank sensor circuit malfunction can cause all of the above,because its part of the timing position for the spark at the plugs,iwould check crank sensor if its within specs!

alright the most likely cause is the spark plug wires. put a set of wires on it and let us now how things are. good luck.