If the V4 is anything like the 959 the answer is no. It does not throw a CEL warning.Installing a slip on like the Spark, does it throw an engine/warning light? As the exhaust flapper valve is connected to the stock muffler box....
Any info would help as i plan to de-core my stock muffler box or simply buy a slip-on...
Im just scared of the engine/warning light may turn on....
Any feedback would help..
Thanks,
Miguel
Philippines
V4 base model