I just bought a new grizzly 700 2017 and the front right light is shaking on idle and not the left one . plastic behind my pipe shakes alot to its normal ?

There isn't one. You have to put one in-
line

replace tire should fix it and dont ride on paved road . tires are not rated for paved roads.tie rod ends , wheel bearings loose or bad , control arms . raise front end and look under atv wear if bad enough will b seen. shake each tire and have helper look under at same time to locate the problem. if one side bad replace both sides to prevent more trouble later on. always support both sides w/jack stands before looking under atv. be safe when shaking atv while on jack stands.

either the float height is wrong, the main jet needle needs lifted or there's an air leak somewhere.

Sounds like your idle/slow speed carb circuit is plugged. A carb cleaning and spraying all passageways with aerosol carb cleaner should find your lost idle

These are often called plastic side covers or cowlings. Your Yamaha dealer should be able to give a quote on the price and then you can seek the part for much less elsewhere.

Sounds like idle jet in carb is blocked.

Clean Maf and check contact at TPS but all that should under waranty , take it to the dealer .

if it has a fuel pressure regulator it could be the problem.

Have you checked your belt condition? I have a grizzly 700 & it cut down to 10mph max and sputtered when my belt shredded in the housing. I think it does this to maintain what belt is left and to keep from damaging parts. I never had the blinking light that I can recall though. just a thought.

Sounds like bad fuel if both want run