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Matt
Matt, Mechanical Engineer
Category: BMW
Satisfied Customers: 21631
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Hi I have a 1981 R65 fitted with flat top bing carbs have just

Resolved Question:

Hi I have a 1981 R65 fitted with flat top bing carbs have just overhauled carbs as bike has been standing some time when engine is started it is very slow to shut down when twistgrip is closed have replaced cables and diaphrams
Submitted: 3 years ago.
Category: BMW
Expert:  Matt replied 3 years ago.

Hello

the carbs on these engines are similar to the old SU type in that they have a variable venturi that lifts up with air flow

 



it sounds to me that the dashpot / sliding part of the venturi is sticking so I'd suggest stripping the carbs down again and giving the dashpots a good clean with some brake cleaner to remove any deposits

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