How to Balance Carbs

[DarrenSV650S]

Right I don't have a scoobie about carbs. What do I need to balance them? How do I balance them?

It's a tzr250 with race carbs and one of them is just constantly leaking out the rubber tube.

I've never done it before. Would it be simpler to just get someone who knows what they are doing to do it?

[Stig]

If its leaking then your not going to get them balanced. Fix the leak then think about balancing.

You'll need a set of carb tuners. There are various different makes out there.

[DarrenSV650S]

I was told it's leaking because it needs balanced

[Lozzo]

It's leaking because the float height is set wrong or the main float valve is unseated by a bit of dirt. Strip the carbs, clean them thoroughly and rebuild them by the book paying particular attention to the flat heights. Then balance them by hand. You don't use carb balancing gear on 2-stroke twins.

What you do is ensure that both throttle slides move in synch and that when at full throttle they are both in the same position. There's lots on the web about how to do it properly, but I don't have specific experience of doing TZRs.

Btw, they need 'balancing' or 'need to be balanced'

HTH

[yorkie_chris]

I was told it's leaking because it needs balanced

Someone doesn't know their rse from their elbow then

[_Stretchie_]

Someone doesn't know their rse from their elbow then

you called??

[Stig]

You don't use carb balancing gear on 2-stroke twins.

I didn't know that.

[johnnyrod]

New one on me, you can balance carbs whether they're CV or slides, you just use different adjustments

[DarrenSV650S]

What should I use to clean them?

[yorkie_chris]

Carb cleaner after you have removed all plastic or rubber. Or soak them in normal petrol for as long as you want to soften stuff up.

[jimmy__riddle]

carb cleaner maybe

[yorkie_chris]

Yes but only on the metal parts. It is not safe on plastics or seals.

[DarrenSV650S]

So carb cleaner will damage the rubber rings?

[yorkie_chris]

I can't say for sure, but I would not risk it.

[gettin2dizzy]

Carb cleaner just evaporates away, so I doubt it'd do harm.

But don't take that as gospel ;)

[yorkie_chris]

Dunno, I was cleaning some amal mk2 carb parts in a plastic tray, picked the thing up and the bottom of the tray stayed on the floor.

[gettin2dizzy]

Bugger!

I'd guess it says on the can anyway.

[gettin2dizzy]

Reading the whole thread....


Clean them in what manner? Whilst on the bike, or whilst in pieces?

[DarrenSV650S]

In pieces. I've got them dismantled in a bucket

[yorkie_chris]

Well take the plastic and rubber bits out and then use carb cleaner.

[gettin2dizzy]

Well take the plastic and rubber bits out and then use carb cleaner.
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