Just donated $10 any chance I could get the service manual

So upon doing some testing I found both my fuel injectors are working and supplying the same amount of fuel to each cylinder, did a compression test and found that there is a 60psi difference between cylinders

Service consisted of oil oil filter spark plugs, air filter was not in need of being replaced

2900 miles, has a uni air filter on it with 2 foam materials and a tight mesh fabric cover that goes over it, weird part is i didn't have any issues with anything until i serviced that machine

so i have a 2017 800ex when i first bought the machine there were no problems, naturally i did a full service before riding season had begun, i now have a loss of engine power in high range particularly if i encounter a hill of any good elevation also flat land seems to be lacking power as well, i used all recommended service items and am at a loss as to what i should look for or where to start looking