Re: Spark Arrestors
I am not going to say it's the best thing to do for your bikes, but there are some advantages to taking out your spark arrestor. Your engine can breath easier, maybe lean out the jetting, and perhaps make more power. It will also save some weight.
However, it will make the bike louder, not fun for your neibors. if it does lean out your jetting, and you do not correct this, engine damage may occure (not sure that it will lean your jetting this much though). Also If you ride anywere outside there is the risk of a backfire becoming a fire hazard. Its called a spark arrestor for a reason.
In the end it's up to you, It's not uncommon where I ride to find bikes without them.
83 ATC 250r (with many extra parts), 83 ATC 185s, 85 Ktm 350mxc.