I’m new to this community and I’m a noob in terms of knowledge about motorcycles, so please ignore my ignorance.
I own a Yamaha MT15, which has run 550 KMs so far, 2 months old. About a week ago I did water wash and lubed the chain. Even before that I had given the bike for first service, and they adjusted the clutch without asking me. I rode for couple of days and didn't like the adjustment and they reverted it back.
After the first service and the recent wash, the performance has gone low. The engine works a lot but delivering less power and speed. The throttle response has also become very poor on comparing to when it was new. I suspect that the rear wheel is too tight, and the spin is also not free while on neutral, and so the reason behind poor performance. And it takes some effort for me to spin the wheel. Pls see video at the bottom for understanding.
I went to the service centre and asked them to check the rear disc brake. They checked and said it’s fine, but I doubt that. Also they said that the wheel spinning is also normal because it is spinning with the sprocket and chain. I mean, even though it’s connected to the sprocket, the wheel should at least spin more than 3 revolutions right? It’s barely completing 1 revolution.
Is this wheel spinning normal or is it too tight? Is there anything else that might be causing this performance dip? Might it be the clutch, chain? I don't have any idea. Thanks for your answers and suggestions.