View Full Version : Beowulf Exhaust backfires, bad for my bike?
XmisterIS
11-04-12, 08:54 PM
I have fitted a Beowulf slip-on.
Now that it's bedded in, it sounds really lovely, especially with the db killer removed!
In particular, it can produce some pretty impressive backfires - complete with flames.
BUT - is that damaging my engine in any way? The sound and the backfires and gurgling is very nice, but I don't want to damage the engine.
If it's anything like my Delkevic stubby, it pops and bangs like a goodun on the over run. I believe it's quite normal. I'm pretty sure somebody more knowledgeable will be along shortly to give a better explanation. It does sound pretty epic though doesn't it.:cool:
i have a k7 twin spark with a warrior fitted and i don't get backfiring, flames or popping.
You should fit a PC as its not so good having unburned fuel washing the bore of oil,Lean Mixtures often backfire
You Tried a Performance filter as they sometimes counter act each other ?
rictus01
11-04-12, 09:13 PM
if a can was the only change you made and was fitted correctly, then you shouldn't have excessive back firing or flames, I suspect you haven't sealed it very well :smt102
However, it's unlikely (but no promises) to damage the engine, but if your can is a race one and has packing in it, this will be stripped out far quicker, leaving the skin (especially if it's carbon) susceptible to heat damage or distortion.
Cheers Mark.
So, mine being a curvy could be running a little on the lean side. It generally pops and bangs when rolling off after quick burst of acceleration? If I'm being a bit more conservative with the throttle it doesn't do it anywhere near as much.
Richen the idle up a touch.Mind you the carb,s ant easy to get too
Joe Marcon
12-04-12, 12:45 AM
Its fine for the engine . I rev alot and hit kill switch on and off very fast and it sounds like a bomb exploded . I did this 100 times on my birthday . And a few other times and nothing has happened lol . Give it ago . U wont stop doing it .its funny watching people jump lol
I did this 100 times on my birthday .
Were you 100 years old?
i think the only way it could damage is if it backfired back through the cabrs/airbox. its unlikely but im sure some people on here have had it happen, but no mention of damage.
flames look cool dont they ;)
Richen the idle up a touch.Mind you the carb,s ant easy to get too
They are certainly very difficult to find on a K7 ;)
Joe Marcon
12-04-12, 09:33 AM
Were you 100 years old?
Nope
Hi, sorry to hijack your thread a little!
Yesterday when on my SV (with Beowulf exhaust), I tried to accelerate in 5th from about 3.5krpm, the bike just stalled and backfired massively. It started back up straight away, but im also getting a few problems when the engine is half warm, when blipping the throttle sometimes it stalls. It sounds as though the engine is being flooded with petrol. Im currently running the standard air filter, but Im thinking I could be in need of a K&N? If I do this will I need a spark plug change (also restricted ECU).
Thanks Guys.
dazzaboy
13-04-12, 05:27 PM
Its fine for the engine . I rev alot and hit kill switch on and off very fast and it sounds like a bomb exploded . I did this 100 times on my birthday . And a few other times and nothing has happened lol . Give it ago . U wont stop doing it .its funny watching people jump lol
Lol it gives you a cheeky smile :D
Joe Marcon
13-04-12, 05:43 PM
Lol it gives you a cheeky smile :D
Take it you like it ? Haha . Dont do too much or you dont get alot of mileage from full tank
Hi, sorry to hijack your thread a little!
Yesterday when on my SV (with Beowulf exhaust), I tried to accelerate in 5th from about 3.5krpm, the bike just stalled and backfired massively. It started back up straight away, but im also getting a few problems when the engine is half warm, when blipping the throttle sometimes it stalls. It sounds as though the engine is being flooded with petrol. Im currently running the standard air filter, but Im thinking I could be in need of a K&N? If I do this will I need a spark plug change (also restricted ECU).
Thanks Guys.
There are a lot of things that can cause it.
From duff plugs to map sensors .
SoulKiss
13-04-12, 06:25 PM
You should fit a PC as its not so good having unburned fuel washing the bore of oil,Lean Mixtures often backfire
You Tried a Performance filter as they sometimes counter act each other ?
Or for a much cheaper, better solution, get the ECU remapped at a Suzuki dealer.
Its all that a PC does and a PC is REALLY more of a bling thing on an SV650
Whyte25
13-04-12, 09:14 PM
Mine did that & it never affected it - I had a viper can on it with no DB Killer in as I got fed up of people pulling out on me.
Joe Marcon
13-04-12, 09:34 PM
Mine did that & it never affected it - I had a viper can on it with no DB Killer in as I got fed up of people pulling out on me.
Ive got a race viper can on mine . And loves to pop . Want a diff can now bored of that noise . Want a different noise lol
Whyte25
13-04-12, 09:38 PM
Ive got a race viper can on mine . And loves to pop . Want a diff can now bored of that noise . Want a different noise lol
Chop it down, haha that`ll change the pitch of it ( possibly)
Joe Marcon
13-04-12, 09:45 PM
Chop it down, haha that`ll change the pitch of it ( possibly)
Uhuh how to chop it down lol
Or for a much cheaper, better solution, get the ECU remapped at a Suzuki dealer.
Its all that a PC does and a PC is REALLY more of a bling thing on an SV650
Well yes if you do the filter and can its all done in one go.
PC you can change the map your self
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