Txc310r bogging will on the throttle HELP!!!

I've been racing my 2013 txc310r and just this last weekend at practice it all a sudden started bogging in and out losing power have way thru a lap. I replaced the spark plug and same issue. Any help would be greatly appreciated..

It sounds like it could be a fuel system problem (fuel pressure, clogged injector, fuel filter, loose fuel pump, et al). It also could be a heat-related electrical problem (trigger coil, coil, electric fuel pump). or just a plain-old bad electrical connection. There's not much info to go on.

To sum up your situation:

• you've been racing the bike, and it's been running fine
• recently it started to bog half way thru a lap
• later it will clear out and run better (???) for the day? for a lap?
• afterwards you can continue practice?

Check your electrical connections (looking for loose wires, frayed wires, exposed wires)

see if you can characterize the issue a bit more.

good luck.