Hi All on the Yammy forum,
My 2012 WR450F makes a backfiring type pop on decceleration. What is likely to be the cause?
It was a loud backfire with the baffle out after i bought it but not frequent, now with the baffle back in it is still there but now a popping sound.
Could it be the exhaust is cracked or not sealed at the joins? Could it be engine issues like valves or running lean? Has anyone else had this? Any input appreciated..
Aussie WR rider