Fuel cut switch

Skilid · 19 May 2011 at 13:17

Hi guys,

My mate has an R6 and whenever he rides past my house he says he flicks his fuel cut off then on again, which makes his exhaust pop/bang quite loudly. He says he does this to say hello as he can't be bothered to get off and knock on the door for a chat lol.

I was just wondering, is this doing any damage to his bike? He does it quite a lot.

Ta.

Fireskull · 19 May 2011 at 14:49

I guess it could decrease the life of the exhaust valves...

Danm54 · 19 May 2011 at 16:50

Its not the fuel cut off switch, its the kill switch.

Yea, wont be doing his bike any favours by doing it all the time.....

Delboy · 19 May 2011 at 16:51

Does the R6 not come fitted with a horn?

Skilid · 19 May 2011 at 16:57

Lol. His horn is rubbish. He has some form of aftermarket exhaust on it. He likes maximum effect. I was following him along in my car once at night and he done it, a small burst of flames came out the exhaust. It looks and sounds cool but I'm always worried he is gonna kill it. Ah well. His bike, his choice lol.

And yeah kill switch (shows how much I know about bikes) lol.

Phage · 19 May 2011 at 17:03

Unburnt fuel igniting in a hot exhaust ? No issue if the system is well built.

Fireskull · 19 May 2011 at 17:26

Its just burning the unburnt fuel that's dumped when he kills the ignition, it will wear the exhaust valves but by how much I have no idea, I just know that when a bike is fueled wrong that's whats most likely to go first along with it possibly knackering the exhaust packing over time.

**EDIT** Actually rereading what I wrote and Phage above it is just the unburnt fuel so I don't think it will do anything to the valves as its already been pushed out.

BennyC · 19 May 2011 at 18:12

There's an overrun mapping for cars will do a similar thing, lifting off over x-amount of RPM will dump fuel in to the exhaust causing pops & bangs.

I'm sure a horn would suffice and not annoy the neighbours

FeFiDoh · 19 May 2011 at 19:37

Indeed it is doable in a car, friend use to do it in his R5 GTT was so damn loud! Did it going past people, made em cack themselves.

Danm54 · 19 May 2011 at 19:43

Does it when you let off if you have a hole in your exhaust.

Got to question what damage regular explosions in your exhaust will cause....

PardonTheWait · 22 May 2011 at 22:53

Danm54 said:
Does it when you let off if you have a hole in your exhaust.

Got to question what damage regular explosions in your exhaust will cause....

Cars and motorcycles operate on the principle of regular explosions

metbandit1 · 23 May 2011 at 04:32

PardonTheWait said:
Cars and motorcycles operate on the principle of regular explosions

+1!

You speak the truth!

Dogbreath · 23 May 2011 at 12:06

PardonTheWait said:
Cars and motorcycles operate on the principle of regular explosions

Within the cylinders, not the exhaust...

edelweiss800 · 23 May 2011 at 20:31

tbh wont do too much damage ,exhaust valves are hardened and made for abuse

on a r6

Flukester · 24 May 2011 at 07:26

i think this old trick only works on bikes with carbs, as with FI when you hit kill the injectors stop squirting...

really well mapped bikes don't bang on overrun to much, FACT

(though mine does hum)