9 replies to this topic

[blue redtop]

got my twins fitted today and it drives totally different(i only took it 200 yards up the road tho).

much more torque and it can wheel spin now to.

the BUT is!!!! when trying to adjust the mix on the carbs and i push the pin think up the engine slowly dies and nearly cuts out.
i know what your guna say THE MIX IS TO WEAK but ive turned the mix screw nearly all the way down and it still almost cuts out.
im only pushing it up about half a mm.

im really confused about this.

i got new needles and springs from burlen fuels so i know they are the correct type for my engine.

any ideas??

cheers jay

almost forgot ive fitted twin su2's.

[Bungle]

might be a air leak on the throttle spindles

[Big_Adam]

Do you have an after market exhaust fitted?

If you do that screws with the lift pin. Did for me anyway.

If you near me some time I'll let you borrow my color tune.

[blue redtop]

whats throttle spindles?
ive got all new gaskets to the manafold and 2 new manafold gaskets to.
cheers

[Big_Adam]

The throttle spindles (bit that the throttle cable is connect to) has two bushes, these wear the shaft and themselves out after a while meaning there's excessive play and more air added into the mix.

[blue redtop]

yes i have a aftermarket scorpian exhaust backbox and a lcb manafold and i welded a 1.75 inch middle pipe to both.
would you post it to me as i cant drive it far like it is.ill cover cost through paypal.

you will be a life saver. FOR THE 2ND TIME..LOL.

[Bungle]

the throttle is a disk that turns to open or close the throttle

this disk spins on a shaft and the shaft goes through the carb body

the bushes where the shaft turns in wares out and air leaks in here

[blue redtop]

AHH THAT BIT...the carbs them self are in very good nick.there is no free play on any parts and everythig is smooth and very nice indeed.
it must be my exhaust system.

[mk1leg]

all twin carbs do that when you use piston lifter, what you need is a colour tune kit or a carb balancer so both carbs draw in same amount of air .........................

[blue redtop]

thanks for reply.
im on the blag for a lend of a colortune if anyone has one that i can borrow for a day or 2.will cover postage and pay beer money |