minimum compression?

[curt d]

i have 1983 vf750 interceptor has 120psi compression is that to low to run?

[CandyRedRC46]

is it even across all 4 cylinders?

[mrich12000]

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So you took it apart. So did ya place the rings in the proper order on the piston?
The comp should be @ 170 and higher and uniform in all cyls. next Question is you did a deglase of the cyls?
Run the engine and do a breakin policy of up and down on the throtle keep the rpm below 5000 for the first 180 miles modulating the throtle up and down again . After all this redo the comp test to see if it had gone up to a normal range. Also do a wet test wth oil to se if the comp increas's -
Hope this helps (dam spell check is off)