Hey guy please help I changed my vrod both tires rear tire i put 260 metzeler and front michelin. Sent them for balance and installation when i get them back the tire shop guys says rear rim and tire was already balanced so he didn’t put any weight on rear rim. On front rim there are weights. Today i went on a ride bike is not stable on road. There is no vibration but bike won’t stay in lane. I have to control the bike or bike goes right and left at 80miles speed. What will be the issue? Tires are not balanced properly? Should i take them again to another tire shop? Actually i haven’t ride the bike on old tires i bought the bike 1 month ago and first thing i did tires change so today was my first ride on this bike so i have no idea how bike was on old tires.