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  #11  
Old 17th June 2019
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CV Carbs act weird like that, maybe you got a pinhole in the diaphragm
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  #12  
Old 17th June 2019
northern bobber northern bobber is offline
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Originally Posted by A Seabee View Post
CV Carbs act weird like that, maybe you got a pinhole in the diaphragm
I was actually thinking about that. My first thought. Another friend is looking for his spare cv carb so we could eliminate the carb alltogether.
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  #13  
Old 17th June 2019
northern bobber northern bobber is offline
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Originally Posted by IXL2Relax View Post
Was this bike operating 'normally' before this suddenly occured?
How long has the owner had the bike? (so as to reference observed changes)
What other service work (or accident or pothole, etc) did the bike experience before this started?

'rocking back & forth heavily' - Does that mean left to right? or surging power-wise? or engine only rocking forward & backward? or the bike jumping forward (like chain jumping cogs)?

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The owner has had it for some years and claim she notices it last year. I must be honest i am not sure wether its been there all the time or not as she has been riding on too high gears and notice it only in the 80km/h speed. So it could be a new or old issue. No accidents or anything. The rocking is forward and back. The force is making the whole bike jump like a rodeo horse but it doesnt feel like loosing power. Therefore i first thought mechsnical but there is something carbish about the behaviour too..
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  #14  
Old 17th June 2019
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Have you checked primary chain for correct adjustment?

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  #15  
Old 18th June 2019
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I had a similar experience with my bike when the ignition control module in the nose cone was going bad. It would feel like it was surging/dying back and forth intermittently and felt like the bike was rocking like a horse, I believe it was right around 3k RPM that I was feeling it the most.
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