Carb balancing fail.
 

Hello all, a very distressing experience has just been had.
I was trying to synchronise the carbs today with a set of gauges I borrowed from my brother. Whilst using the gauges I found them to be totally duff fluttering all over the place with adjustments making no diference, so I gave up and tried to put it all back together again as I had had to go the long way round(radiator, airbox and obviously tank all moved/removed) and then I started her up and RAAAARRRRRRRRRRRR full throttle with me excersising my wrist in a nocturnal fashion all to no avail.
What in the name of the wee man have I done now?
The throttle is closed on the handlebars but she's revving her head off and backfiring like chitty.
Please help. :confused:

Re: carb tuning WTF
 

sounds like you have adjusted the carbs to rev higher, or maybe one of the valves is stuck open?

Re: carb tuning WTF
 

Have you replaced the two tubes you removed to attach the gauges? If not this extra air will probably cause it to rev.

The gauges will flutter if you don't have the damper tubes in place. Some gauges have a threaded moulding on the hoses you need to remove for use on the SV carbs. If this is the case, use two lengths of hose on each carb so you can still have a damper tube between your carbs and the gauge. Reading this makes it sound complex, but it actually isn't!

Hope this helps?

Re: Carb balancing fail.
 

The gauges have a screw on the face of them to adjust and stop the fluttering but they just didn't seem to settle. When I had given up I though it wise to leave a tube running from the front for easy access next time, but, I might have left it leaking slightly, would this cause the revs to stick?

Re: Carb balancing fail.
 

That would cause the popping. The tube needs a bolt sticking down it to plug it.

First things first what is it revving to? Redline or what?

Re: Carb balancing fail.
 

Yeah revving as much as it can. I have just replaced the plugs as well but don't think this is connected?

Re: Carb balancing fail.
 

dislodged the throttle cable or snagged it..

Re: Carb balancing fail.
 

Did you take the cabs off at anytime? Check that you dont have anything trapped on the throttle linkage and that it moves and snaps shut...on both sides of the carbs. If you removed the throttle cables, then have you put them on the right way round? Again check the throttle action and the linkage action for signs of this. Air leaks will case popping and poor idle more than revving!

The easiest way to balance carbs for the 1st time is to remove them form the bike, fit a length of tubing to the front inlet, then but all back together, then as said but a sutible bung/bolt in the pipe. You then balance the cabrs with the bike warm adn the airbox on, although i always do mine with it off!.

Re: Carb balancing fail.
 

Thanks for the advice I'll go and check to make sure I haven't snagged the cables on anything and make sure they're closing properly.

Re: Carb balancing fail.
 

Connected them backwards perhaps?