well here we go did a compression test on her
suzuki gsxr 400 gk76 1991 35,000 miles
here's the results on a cold engine
Left too Right as you sit on her
cyl 1 110 psi
cyl 2 120 psi
cyl 3 110 psi
cyl 4 110 psi
with oil down plug hole
cyl 1 280 psi
cyl 2 290 psi
cyl 3 290 psi
cyl 4 290 psi
Think the rings are worn,
what u all reckon ??
Eddie