Finally getting all the niggles sorted, had the best drive today since February.
Except....
At 50-60mph (and above I assume) in sixth gear, it doesnt like it.
If I squeeze the throttle the problems even worse, its fine with higher revs.
What are peoples thoughts?
Too much fuel?
Air?
Jet kit required?
Or is it tough?

Rolling road.

What does it do? spit back, bog down, die, etc?

exactly

As I see it you have 3 options:
Lambda probe (even a narrowband would get you started, but wideband would be better)
Rolling road
Trial and error (raise the needles a notch to richen it and see if it gets better or worse)


Matt

If you go trial and error (as I would expect from any proper locoster) then this guide is pretty serious.

http://www.factorypro.com/tech/carbtune,CV,high_rpm_engines.html

yeah locost all the way haha.
thanks Matt

I had the same problem when i was trying to get mine to accelarate, I ended up drilling the main jet up in increment, This corrected the issue.

checked floats, all good.
re-positioned the fuel ram inside the air intake ram, running sweat again.
thanks for the tips.
think Ill get it rolling roaded though to get it perfected.
Will update in few weeks.