Sucking cold air back into hot exhaust valves during deceleration can lead to valve damage, ie: warped valves.
Getting a ticket for running open exhaust will cost you $$. ;D Apparently only Harleys are allowed to run open pipes, not quite sure how they get away with it! <sarcasm>
I used to have a KZ650 a few years back, never had a problem with law enforcement. It was like I was invisible. Within a week of installing a 4 into 1 header, I got a speeding ticket. I prefer stealth mode!
funny this thread came up, just this weekend I rode around yuppie Walnu Creek without pipes. I pulled them off to weld a broken support bracket and decided what the heck lets give her a run around the block. I've heard bikes much louder, I couldn't imagine getting into trouble for it... well serious trouble at least ;D
I thought it sounded pretty narley... I wouldn't ride like that normally but I thought how many chances am I going to get to hear an open header ex500... not many i figured. I would have never tired/known if I hadn't broken that support bracket by the passenger peg = )
I had the header bolts back out at 700 miles and that was loud as hell for the three seconds it took me to shut the bike off after I realized what had happened but I got it fixed real easy by tightening the bolts back up only burning my fingers like ten times because I was in a hurry to get riding again.
^Now that's a run-on sentence ???. lol... got bored ;D
people need to quit saying all sorts of dumb stuff on these without cans threads
it will do 4 things
sound less refined
give you less power down low, no backpressure
give you a little more power up top probably, no backpressure
assuming the bike is tuned properly. i wouldnt know enough to say if they need to be retuned a/f wise to run perfectly without cans, id guess since its a small motor its fairly sensitive. ive run all sorts of bikes without cans, its not a big deal. my cb750 runs a vance and hines 4-1 with no baffle, its the loudest motorcycle ive ever heard. the exhuast is just a big straiught pipe in a horn shape. it runs fine, always has. tons of bikes run without cans, personally i like to hear my engine. but i also have a gs500 i run with stock pipes because i commute on it and dont want attention. whatever
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