Why does my 07 Apex Rtx back fire when I let off the fuel?

[Outlaw1969]

Hello, I’m new to 4 strokes. I bought a 2007 Apex Rtx, it backfires when I let off of the fuel. I changed the plugs, if still does it. Any help would be appreciated. Thanx

 

[steiner]

Exhaust. Either the donuts are shot, flex pipe is broken or you have a broken Y pipe

 

[dylanjen9]

Could be bad exhaust donuts

 

[michmobiler]

Exhaust. Either the donuts are shot, flex pipe is broken or you have a broken Y pipe

Bingo!

 

[DCW2018]

Contact Travis at Barn of Parts. He sells used 4 stroke parts and helped me with my Apex and Vector. I needed basically the entire exhaust and he had everything. Make sure you get stainless steel y pipes when / if you need to replace them.