Sparks coming from exhaust

adamcfc · Borekit Bruiser Joined: 29 Apr 2011 Karma :

Have just ridden home from a long ride with my freind, he pulled me over to say there were sparks coming out my exhaust. I rode along looking and sure enough every now and again a burst of sparks came out the end can. My bike is a Rieju RS2 50, 2007.

It was only happening under load, and appeared to be random. Would this explain my recent loss of power and why the bike wont rev above 9k easily anymore.

If sparks were coming out the end can, what damage has it done to the head and barrel, and the rest of the exhaust? Why is it sparking anyway?

Many Thanks, Adam

finpos · World Chat Champion Joined: 13 Sep 2005 Karma :

The good (or perhaps bad, depending on your viewpoint) news is that it is most likely just your exhaust breaking up inside and falling to bits, or if it's a two stroke it's full of grot. Either could be slowing you down.

You may need to take it of to decoke it and/or see if it falls to pieces.

f.

tutton · World Chat Champion Joined: 04 Jan 2008 Karma :

Always understood exhaust sparks to be carbon in the exhaust getting very hot and trying to ignite themselfs, due to a old tuned diesel used to do the same on full throttle and spit sparks out the exhaust.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

Fairies attack · Banned Joined: 21 May 2011 Karma :

Take the head off and decoke it.

Then clean your exhaust out.

All it is, is the wadding in you can been burn out. This could be from age or something you have done differenet to the engine recently.

MickC · Spanner Monkey Joined: 27 May 2011 Karma :

I'd go for de-coking the exhaust first, it's a fuck of a lot easier than removing the head (even if you are a competent mechanic). Before you do either though try running a couple of tanks with Redex or preferably 'Magic Bullet' through it to clean the shit out.
____________________
XX XXXx
Previous: CG125,XS250 (converted to 400),Z250A, GPZ550, Norton Commando, XS500, 78 Laverda Jota, GPZ1100,Harris bonneville, XV750 (mono shock),TR1

adamcfc · Borekit Bruiser Joined: 29 Apr 2011 Karma :

cheers for the help guys, althought the head and barrel has only been put on recently so it cant be coked up already? And this isnt causing any damage by riding it like this then?

Adam

mr jamez · World Chat Champion Joined: 04 Aug 2003 Karma :

Is it getting louder? The wadding used for sound proofing might be breaking up and getting spat out the back.
____________________
NSR 125F > BROS 400 > NC30 > BROS 400 > Trumpet S4 > '97 VFR 750

Wafer_Thin_Ham · Super Spammer Joined: 18 Nov 2005 Karma :

adamcfc · Borekit Bruiser Joined: 29 Apr 2011 Karma :

Ok thanks

any ideas for how to decoke then? i dont really want to go down the caustic soda route, but if i took the end can off could i jet wash the inside on some grass or something?