Crap, what did I break? (Over rev'd the engine)

[PhoenixS4R]

2005 Monster S4R, Marvin mid pipe, Akrapovic slip on.  Power commander, internet map.


(Yesterday) I was traveling down the freeway (65-80 mph, i'm not sure), when an random altercation with a fellow on a Harley made me wanna book it... Didn't realize I was already in a lower gear than normal, downshifted a few times (I can't tell you exactly how many) Let the clutch go, and hit the rev limiter a few times before while I freaked out and pulled in the clutch and popped it into a higher gear.

Immediate symptoms: The tachometer stopped reading right. I pulled off the road to make sure everything was good, and noticed when it was idling before I shut it off the tachometer needle was at 0rpm, vs my normal 11-1200ish rpms. Started to freak out a bit more.

Turned the motor off, visually inspected the bike to make sure everything was ok from an exterior stand point.  Turned the key, and instead of the needles doing their full sweep, they stopped about halfway. I turned the key off then on again, and they fully swept, I started the bike, and the idle rpm was back to normal.

I drove home, power seemed to still be there, but whenever I passed someone on the left (AKA object or car on my right) I can now here a "pft" noise along with the typical exhaust tone. It sounds to me like an exhaust leak.  Today when rode the bike the noise was still there. I know for a fact a get paranoid and hear stuff when I get freaked out I broke something that I had probably ignored before, but this has me worried. I noticed a small exhaust leak where my midpipe meets the S pipe that connects to the muffler, but I'm afraid I screwed up a valve or something.


The bike runs fine, the sound bothers me tho. I'm all freaked out, did I really mess up?


Thanks guys/gals.

[Ddan]

If it runs fine I'd say you're fine.  I hear random "new" noises every time I change the oil.

[vossy]

An easy fix is to take 1 bottle of Whiskey a small glass and some crushed ice.

Pour a generous amount of whiskey into glass and add a little ice.

Sit or stand while drinking the fine liquid.

After several of these the problem will be fixed.


(you'll be too drunk to even think about it)

[scduc]

I'd say you are probably over-reacting. The rev limiter is there for a reason.

[accrocker]

With desmodromic valves the chance of doing damage due to over revving is greatly reduced due to the inability of the valves to float. If the bike is running well, I wouldn't worry.

[PhoenixS4R]

Ok. Really embarrassed. I took my bike over to my buddies... he rode it around and agreed it sounded like an exhaust leak. He hoped off my bike, and pointed out the little allen bolt that goes in the Marvin mid pipe about halfway downstream had wiggled its way out. Lol.


Anyone have specs and that stupid bolt.

[myssrhl]

specs - tight

bolt - Ace Hardware

[ungeheuer]

Ok. Really embarrassed. I took my bike over to my buddies... he rode it around and agreed it sounded like an exhaust leak. He hoped off my bike, and pointed out the little allen bolt that goes in the Marvin mid pipe about halfway downstream had wiggled its way out. Lol.

Cool, I'd take a little embarrassment over an expensive fix any day 

[ducpainter]

With desmodromic valves the chance of doing damage due to over revving is greatly reduced due to the inability of the valves to float. If the bike is running well, I wouldn't worry.

Agreed...

and the fact that the same basic crank is used in motors that can safely rev to 12K+ would suggest it would be difficult to damage it with one incident.

[speedknot]

Dont run from the Harley guys next time.  Unless they're lookin to make you their pregnant dog.

[the_Journeyman]

Dont run from the Harley guys next time.  Unless they're lookin to make you their pregnant dog.

Timeless quote!

One a constructive note, we'll not talk about the things I've done to my M750 and it still runs like a champ.

JM

[J5]

I'd say you are probably over-reacting. The rev limiter is there for a reason.

i think there prob wont be any problems

but

rev limit stops the igintion allowing the bike to over rev while accelerating

but if you are riding along and go down too many gears and pop the clutch the motor
will match the revs and that can be way higher than the rev limiter

nissan GTR's for example have been know to spit out rods from the block from the above and
going past 10,000 rpm

[Düb Lüv]

you'll never have cooler BeDazzled chaps than a harley guy, so it's not worth fighting over.

[scott_araujo]

Did the tach start reading properly again?

Scott

[Rameses]

Did the tach start reading properly again?

Scott

...they fully swept, I started the bike, and the idle rpm was back to normal.

I assumed he meant the tach was working fine by that line.

I could be errant in that assumption though.