Z1OwnersClub GB

changed a gpz1100a2 to carbs . got a std filter,cobra pipe ,no baffles. any ideas on jet sizes. cheers

If they're std older GPz1100 carbs (BS34), the mains are approx 125, so with an open pipe start at 130

the carbs are off a z1000 j2

130 - 135

I am running 135s on my Z1000J and it seems to work reasonably well.

Greg

Interesting question. Not sure about my english here, but what about the idle jets and screws...? thanks

An f4 Phantom is quite big

dimble wrote:Interesting question. Not sure about my english here, but what about the idle jets and screws...? thanks

Pilot jets may need to go up a size (eg: from 17.5 to 20) and th air screw will just need to be fine tuned

Ok pilot jet and not idle ...thanks for the lesson

How to fine tune the air screws. Someone told me about pointing each exhaust and measure the temp and adjust...Do you have a simpler method?

You could do worse than buy these to set up the carbs and in particular the 'air' (fuel) screws.

http://www.ekmpowershop20.com/ekmps/sho ... s-25-p.asp

This is a special offer which saves a few quid!

As a general guide to setting up the rest and interpreting what you get with the above mentioned you might follow this.

http://www.mikuni.com/fs-tuning_guide.html

Someone told me about pointing each exhaust and measure the temp and adjust...

Do you mean painting the exhausts??
You can tell a lot about initial temperature gains by putting candle wax on the uppermost exhaust stud of each cylinder and seeing which come up first and of course last.
Also useful if youve got a cylinder down and dont want to burn youre hands.

AL

i was thinking paint but pointing each exhaust with a laser temp meter...