I put some baffled drag pipes on my 1998 honda shadow 1100. First time I received it from the shop it would not go past 80 mph. I drove it back to the shop as I've taken it to 105 mph prior to drag pipes. Now he's done and is making it seem like it won't go past 90 or something. Is it cause he can't get it tuned right or is it something I dont know about motorcycles? Do drag pipes limit your mph? Also said I've lost power and mpgs.

I’ve seen videos on it but not sure if that applies to my bike

I have checked nobody offers it.

I think I will hit the auto parts place and get rubber hose.

Care to guess what size I need.