Carb set up

[tiptoes]

I read somwhere on here to make sure the carbs are balanced correctly,how often do you have to do this,is it a simple job or best left to a pro.
My bike does feel a bit lumpy ,also when i was followed by a mate he said the exhaust fumes were quite strong (petrol).

[Beamish]

I read somwhere on here to make sure the carbs are balanced correctly,how often do you have to do this,is it a simple job or best left to a pro.
My bike does feel a bit lumpy ,also when i was followed by a mate he said the exhaust fumes were quite strong (petrol).

Ebay search carb tune or carb balancer, there are various different gadgets from mercury to led lights. There was a good thread that I recall on here, search this site, in the mean time I will have a trawl for you.

[Beamish]

Try this one
http://www.carbtune.com/

[Beamish]

And this one
http://www.dansmc.com/balancecarbs.htm

[tiptoes]

Thanks for the info

[sirch345]

I found this item to be very good, simple but effective

http://cgi.ebay.co.uk/UNIVERSAL-MOTORCY ... dZViewItem

Balacing your carbs won't make any difference to the richness of your mixture, that your mate commented on

I would have a look at your airfilter, as if it needs replacing that will cause your bike to run richer than normal.

Chris.

[LotusSevenMan]

You have to remove the blanking plugs and fit the adaptors. I keep mine in place permanently as they are such a pain to fit and remove etc. I used to have two pipes on either side of the bike (see pic 1) but then extended the rhs one across to the left side (see pic 2).
I just have two blanking plugs in place (golf tees work well and can be colour matched to the bike; sad eh?).
After use the pipes are blanked off and tucked behind the frame. All neat and very easy to do the carb balancing job!

Pic 1 (as it was)


And pic 2 (as now)

[Beamish]

Nice touch LSM Worth the effort? How often have you had to play with them?

[LotusSevenMan]

When they are that easy I actually do them reasonably often (800-1000 miles) as they DO go out by a slight amount quite often. That is just how carbs are. Mates wonder why I do mine 'so often' but are amazed when I have done theirs and it is surprising how you get used to a bike 'going off' slightly over a few miles and how sharp it can feel again after doing the job!
I use a rig like that eBay one that Sirch (Chris) uses & the whole process only takes a few minutes so why not!

PS Forgot to say that I just use a 'T' piece in the left vacuum carb line where it goes from the fuel tap to the carb itself.

[LotusSevenMan]

OK. Balance is one thing. This is the synchronisation of the two carbs so they effectively 'suck' the same amount. The alteration of this balance screw changes the throttle slides so they lift together. This screw is located where you can see the two small springs on the arm under that large return spring on the rear carb.



You don't need to dismantle the bike to do this synchronisation of course. All done with it complete though a tight squeeze for a small hand and small electrical type screwdriver.

[LotusSevenMan]

You say a tight squeeze for a small hand? How about a big fat pudgy hand with pigs tits for fingers?

Well mine fit just and as I say an electrical screwdriver ie. flatblade not cross head (as you'd expect!) of about 150mm long will do fine. It's a knack.