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SOHC.co.uk Forums => CB750 => Topic started by: robbos cb on June 14, 2018, 08:36:00 AM

Title: cb 750 smoke
Post by: robbos cb on June 14, 2018, 08:36:00 AM

Hi good morning i have just purchased a cb750 k3 1973 and i have noticed that it is emitting smoke when revved to about 1500 rpm,
am i in for a major strip or is there another problem.
Just a heads up on this bike it has stood for four years so i have changed the oil and filter changed plugs and added a fuel boost .
Any ideas, please :( 

Title: Re: cb 750 smoke
Post by: Speed on June 14, 2018, 10:39:58 AM

what colour is the smoke

Title: Re: cb 750 smoke
Post by: Nurse Julie on June 14, 2018, 10:45:47 AM

Could be a stuck piston ring/s.