This is a 4 stroke blower.
Long history of not rev'ing well, so I opened the rocker case to adjust the rockers.
I found spec on-line for BHX2500 which says .15mm which I make 6 thou so have adjusted to that.
The gaps were massive before, probably 20/25 thou on both valves.
It now runs and rev's much much better but I am concerned that the rockers and the upper valve assembly appeared to be quite dry.
Just wondering how it is supposed to get lubricated.
Oil level in sump is OK.
Thanks