help please

[yamaha27]

i have an 04 yfz it has hot cams and exaust and jetted but it is really hard to get to start can anyone help? thanks

[Dr89]

probably your battery, some of the 04's wont stay charged so try and hook it up to a trickle charger and then try starting it. could also get a bigger battery for it.

if not that it could be a number of things, spark plug, intake valve could be to tight/sticking, but im going to put my money on the battery.

you may have to check or adjust your valves.