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Is it possible for the return spring to bind in its shroud (if it has one )?[/quoteGreat idea and on reading this I got very excited to think it might be something simple as that however as previously mentioned it dosent do the fault when engines off and if it was the shroud I’d expect it to do so both engine running and engine off??Because it fails to do so when off I don’t believe it’s anything mechanical?Could be wrong tho, have been many times before!
Ok, in that direction of "oddness" what have you ended up at when setting the idle mixture screws?Projection to try and see if if makes a difference, turn the mixture screws IN a quarter turn from where they are, this should slow the tickover down ( makes it richer) forcing you to wind up the main tickover rpm control for the carb rack to bring it back up to normal level.Let us know if that changes it.
The only thing I can think of is an air leak in the inlet rubbers but when I had the carbs off I inspected them all and they all looked good?? Don’t really want to start throwing money at it when I don’t know what the exact problem is?Any more help would be appreciated if you guys/girls have any ideas??ThanksAlan
I’m clutching at straws here but could there be a little suction pulling the needles up in their holes? If that’s not nonsense, maybe allowing more air via the pilots (1/4 turn anti each) might help.
I’m wondering if the return spring is incorrect? Running out of ideas nowDoes anyone have a spare throttle return spring I could purchase? DSS have them as discontinued??ThanksAlan
Quote from: Wenman on July 14, 2020, 02:03:04 PMI’m wondering if the return spring is incorrect? Running out of ideas nowDoes anyone have a spare throttle return spring I could purchase? DSS have them as discontinued??ThanksAlanSliver do the spring Link >>> https://www.davidsilverspares.co.uk/CB750K2-FOUR-1972/part_221951/
Quote from: K2-K6 on July 13, 2020, 05:33:47 PMOk, in that direction of "oddness" what have you ended up at when setting the idle mixture screws?Projection to try and see if if makes a difference, turn the mixture screws IN a quarter turn from where they are, this should slow the tickover down ( makes it richer) forcing you to wind up the main tickover rpm control for the carb rack to bring it back up to normal level.Let us know if that changes it.The routine I posted a couple back is trying to move it in the direction you are after, give that a try and see if you get an improvement to assess if it's on the right track.