gt 380 carb balance

[BIGDAVE]

hi i am new to the forum,i have just bought a 1975 gt380m,after many years on four strokes,i bought a 380k in 1973 so like revisiting an old friend,i love her to bits,i want to balance the carbs using my vacuum guages do i use one pot as reference,and set the others to that one,with my four pot four strokes one carb is fixed and i adjust the other three.
thanks for the help in advance.
Dave

[Craig380]

Welcome, Dave

For what it's worth, I would bother with vac gauges, just remove the airbox, sync the slides visually by eye so they all disappear into the carb body at the same time when you open the throttle.

Then set the pilot screws at 1.25 turns out, refit the airbox. If you've got standard air filters in there, they do like to be quite well oiled (not dripping, but they should leave a trace of oil on your finger if you touch them).

Keep us posted ...

[BIGDAVE]

Thanks for the info,have just done as you suggested,slides seem to be spot on,one further question i need a right hand silencer,i have seem one on e.bay but does not list for what model,can anybody tell me the difference between the j-k models and the L model on exhausts,as i seem to remember there is a difference.
thanks
Dave.

[Craig380]

The pipes on the L, M and A models were revised with the mounting points in a different position, to give more ground clearance. Early pipes will fit on a later model but you need to make up an adapter plate, and of course the early pipe will hang lower.

Get some spannies, you know it makes sense

[two-stroke-brit]

The pipes on the L, M and A models were revised with the mounting points in a different position, to give more ground clearance. Early pipes will fit on a later model but you need to make up an adapter plate, and of course the early pipe will hang lower.

Get some spannies, you know it makes sense

+1 to that
wake that puppy up.