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JAMSXR
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PostPosted: 17:51 - 05 Mar 2007    Post subject: Backfire? Reply with quote

On my old GSXR 600 had a yoshi tri oval can it was raw and backfired alot of the time producing blue flames. On my 636 i have a akrapovic can with the baffle removed, it dose bakfire but not much and dose not produce any flames? I know this problely makes know diffrence and im not really botherd but i just wonderd why? is it to do with the bike or the cans?
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steveh
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PostPosted: 17:58 - 05 Mar 2007    Post subject: Reply with quote

i have limited knowledge about this, but it sounds your mixtures out, and its running rich, just sticking an end can on it doesn make it gain any horse power, and doesnt mean its going to run correctly.

on most cases youl get away with it, some do need setting up.
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Cog Head
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PostPosted: 18:17 - 05 Mar 2007    Post subject: Reply with quote

can making a bike backfire with the kill switch cause any dammage ?
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lllN30lll
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PostPosted: 18:21 - 05 Mar 2007    Post subject: Reply with quote

Cog Head wrote:
can making a bike backfire with the kill switch cause any dammage ?


yup, i do about 10 backfires a day and this is the result, blew the carbon fibre sleeve away from the rivets
https://img.photobucket.com/albums/v707/lllN30lll/piccy-0304.jpg

BUT!!!!

after a few hours I stubbied the fooker Very Happy
https://img.photobucket.com/albums/v707/lllN30lll/piccy-0313.jpg
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JAMSXR
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PostPosted: 18:28 - 05 Mar 2007    Post subject: Reply with quote

I know you can use the kill switch but on my GSXR if you were at say 13000RPM and you came of the throttle as the revs drop it would spit out blue flames.
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Honda SFX50 > Aprilia SR125 > Aprilia RS125 > Honda RFV400 > K4 GSXR600 > KTM Duke > C1H 636 > K3 GSXR1000 > Aprilia RSV-R > Triumph Street Triple R > Ducati 899 Panigale > Aprilia Tuono 1100 > Triumph Daytona 675R > KTM SuperDuke 1290 2.0
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lllN30lll
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PostPosted: 18:46 - 05 Mar 2007    Post subject: Reply with quote

mine didnt do that, but now it's stubbied it does it like hell, looks and sounds mint Thumbs Up
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steveh
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PostPosted: 18:53 - 05 Mar 2007    Post subject: Reply with quote

over run, sounds better to me, most bikes will do it, especialy with a non standard can.

i think it sounds great when it burbles and pops, back fires on the other hand just make your bike sound like chitty shitty bang bang.

(Just roll off in that gear from high up in the rev range)

Also puts alot of strain on your downpipes, gaskets and joints ect.
i used to do it alot to scare people, was a great laugh, could get about a foot long flame out the back.

Just dont do it past a copper Neutral
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JAMSXR
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PostPosted: 19:19 - 05 Mar 2007    Post subject: Reply with quote

Im ok on my 636 not as bad as the gsxr its quiter ticking over problely, but gives a louder screem when ragging it, it gives of the odd nice sounding pop, but my gsxr was like a 24/7 fireworks display Laughing
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Finglonga
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Joined: 27 Jul 2004
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PostPosted: 19:30 - 05 Mar 2007    Post subject: Re: Backfire? Reply with quote

JAMSXR wrote:
On my old GSXR 600 had a yoshi tri oval can it was raw and backfired alot of the time producing blue flames. On my 636 i have a akrapovic can with the baffle removed, it dose bakfire but not much and dose not produce any flames? I know this problely makes know diffrence and im not really botherd but i just wonderd why? is it to do with the bike or the cans?


Most probably an air leak in the exhaust system letting air in and helping the unburnt fuel ignite.
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