No oil pressure!- busted oil pump drive chain?

Hi guys, gave my VF 1000F a start yesterday, as I hadnt given it a run in a while, started fine with oil pressure light off when it fired ran and idled OK. Just as I was going to shut it off I heard a noise a bit like the starter engaging and it stalled. When I restarted it it had no oil pressure, and I think it may have broken the chain drive to the oil pump. Havent had a chance yet to check the manual but from memory I think you can access the oil pump from the sump. I rebuilt the motor about 20,000ks ago but couldn`t get a pump chain at the time, mmm…
Any advice guys?

oops, does not sound good. You can access the pump from sump, and chain from clutch cover.