husqvarna smr510 te510

From my local Craigslist ad: Ive owned the motorcycle since 2014 and have put about 2500 miles on the bike for a total of 5000-5500 miles. Previous owner essentially replaced everything on the engine and installed the 530 kit and the rr water pump (See link for more info). Engine - $1500...

Bike has sat for couple years without starting. Ran fine before. Now won't start. Drained fuel. Cleaned fuel filter. Pulled carb down and cleaned/checked everything. Jets are not blocked. Put new plug and looked inside where plug goes and I can see rust on the exhaust valve so I'm thinking maybe...