Silencer/downpipe diameter

My bike is fitted with a Jama exhaust which is in good condition apart from a bit of road rash on the o/s silencer. It’s nice and quiet but still has the distinctive Z13 sound but I would like the bike to look as standard as possible so I’m thinking of buying a set of Busso replicas. Can anyone tell me the inside diameter of the silencer so I can be sure my downpipes will fit correctly please?

Are your header pipes part of the Jama system?  I would have thought they’d be the same diameter as the factory fitted pipes. You could email Busso to ask the size of their silencer inlet.  Interesting that they have these silencers on sale at a reduced price at present- a good time to buy.
of course, the down pipes go into the collector, then the silencers fit onto that.

Pull the silencer then measure?

biltonjim wrote:

of course, the down pipes go into the collector, then the silencers fit onto that.

ah well thanks me stuffed then as the Jama system doesn’t have a collector as such. It uses two separate three into one which the silencers attach to