Dare I ask how near original Sand Cast are you gone a do your model?
Now this discussion about short throttle springs. As the original setup could not close properly!
Don't for sure know exactly what change did the difference. Thicker cables or the higher slides some 2/100 mm smaller in diameter
I could use the weak springs for years afterwards without any problems.
Though changed to double cables when that was possible.
Some in this Forum insist on 28 carbtops. Are they modified for 6mm cables?
Do someone still want to use the shorter slides?
Apparently more than me had a problem since Honda gave away new parts which indeed cured the problem.
And I for one never came about to complain.
I shall not tell anyone what to do, but apparently 6mm cables and the 46mm high slides would do, and that still with weak springs!
Youers Erling.
P.S. Some 10 years ago appeared here in Danmark a Motorcycle History Book (Danish).
In the chapter about our Honda, the author claimed all 4 slides could stick wide open simultaneously!!
I had never a problem with more than one at a time, and do not remember if it was the same every time. It took some time to rectify of cause. But it did not happen that often.
Only the one time outside the camping in Milano (Italy), to start the 1000 mile ride home, all luggage had to come off again, but girlfriend could hold the tank though.
Erling.