I'd say use a flashlight and look in the tank for any signs of rust. Drain the tank and carbs completely and refill with new gas (put some seafoam in with the fresh gas, that will clean everything out). Check the tires for dryrot, check all cables for any binding, change oil and spark plugs, check chain for any dryness/rust and lube if necessary, put the battery on a tender and make sure its fully charged.... im sure i missed something lol.
4-5 months outside is a long time, hopefully the carbs dont need cleaning.
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