Carb balancing

[Ironman]

If using a mercury balancer just remember to leave the throttle alone and raise the idle with the idle screw. A mate borrowed my balancer and blipped the throttle sucking all that lovely mercury straight into his bike.

[Pixie]

If using a mercury balancer just remember to leave the throttle alone and raise the idle with the idle screw. A mate borrowed my balancer and blipped the throttle sucking all that lovely mercury straight into his bike.

That's not good!
Mercury dissolves aluminium.

[Bonez]

That's not good!
Mercury dissolves aluminium.

It get pretty hot in them there combustion chambers.

http://www.du.edu/~jcalvert/phys/mercury.htm

Did a similar thing with Gerty. Not the whole lot, but some. Just decided "oh well" disconnected the vacum tubes, placed the screws back in the carb manifolds and revved the hell out of the engine then went for a 300km ride. 14 years later..................http://www.kiwibiker.co.nz/forums/sh...light=cb750fc2

Made up a balancer using a car vaccum gauge rubber tubing and a 4 tap fitting designed for fish tanks. Already had the adapters from the mercury set.

This link may help others in there quest for balancers-

http://www.kiwibiker.co.nz/forums/sh...light=wet+pets

[Nolan]

Ok if one header is way colder than the rest, low down power is useless(flatspot at 6500K) but high revs seems normal, apart from the cylindars make an out of balance sound?
I created the flat spot as ive balanced the carbs(gauges were are all lined up)
I think that if i pull the carbs off and visually see that they are all lined up, that one will be out?

[paturoa]

- How much throttle for the flat spot? ie accel at half throttle?
- Colder at start and idling?
- Have you done a compression test?

Buy 4 new spark plugs, warm up the motor and change the plugs to the new ones. Do a LOW throttle run and look at the plugs. They should all be the same. Remember that balancing the carbs is only for small throttle openings.

This is where it gets interesting - could be a whole bunch of things. You will have to eliminate them one by one and only one at a time.

Throttle cables, different needles, main jets, needle heights. I'd check the float levels first.

[MWVT]

yea i posted that just before i went to get. damn is it a gauge or mercury balancer? and how much?

On another note, does anyone know where i could go to get my cbr seat re'covered? Its got a rip on it.
The cbr is starting to look a little better now. I think its had a rough life

Seat recovering. Just got my shitty old VT250 seat recovered. Rang around quite a bit got quoted 150-200 repeatedly, hit on a guy in onehunga, Marsden Auto Trimmers, did it for 70. Far as i can tell did a good job too (not that i'm any kind of upholstery expert). Put it this way, you could do worse