strange backfire
 

hi all, i have a 2000 sv650s recently purchased..dont know why i waited so long.
occasionally i seem to be getting a missing/backfire from the carbs? is this due to an air leak? or is it just a characteristic of the bike, it is only very occasional. as i have not long had bike and two small children i have not had the time to have a poke about and see what kind of tinkering has been done .

Re: strange backfire
 

does it happen when you roll off the throttle at around 3-4k if so thats normal

Re: strange backfire
 

it does it when i am at about 3-4 grand but putting throttle on, like i say only occasionally. it has a scorpion can on it so maybe jetting issue?

Re: strange backfire
 

Mine backfires a little under closed throttle on the over-run, normal as they all seem to do it. Adds to character.

Maybe get it rejetted/dynojetted and see. :)

Re: strange backfire
 

mine does it as well and always brings a wee grin to my face when it happens. :D:smt045

Re: strange backfire
 

Do the revs drop when it backfires and then pick up shortly after?
Sounds like an electrical problem. My bike has an intermittent fault similar to yours, but it's much more violent :|
Check for any chafing of the loom against the frame. Common areas are headstock and under the rear fairing pannel on the left hand side. Also check your sidestand switch and kill switch are working properly.

Re: strange backfire
 

cheers all, will investigate inside and see if there are any sparky things going on, like i say its very occasional, so if nothing obvious will just have to live with it!

Re: strange backfire
 

Mine used to misfire now and again. Could hear a pop from under the tank.
Ran great until I sold it. Plugs always looked fine too.
It might have been and air leak somewhere near the carbs/airbox

Re: strange backfire
 

cheers vardypeeps, the popping from under tank is definately there, as for the flame out of the exhaust. mahoosive! singed my wheelie bin.looks like some investigating when i get day of peace from small people and wife(paint the fence.stain the decking. when are you going to hang that picture.daddy can you build me a ben ten playhouse and take me to the park.etc)

Re: strange backfire
 

What, you're saying you still can't get it done?! ;)