Yamah f80 carb - "neutral position" speed

[peterv6i]

Hello to all..
I would like to know what is the right rpm for the "neutral" position?
On my Yamaha is 600-700 rpm but the rpms sometimes goes to 800 rpm than to 600 etc.. (the speed is not quite... I'am in doubt because I think that there is something in my carb (garbage? watter or emulsion?)..

Is there some link to show how to dismount and clean carbs for Yamaha F80?

 

[rodbolt]

Re: Yamah f80 carb - "neutral position" speed

idle in N is 850 plus or minus 50 and in gear 750 =or- 50.
carb kits are about 95 dollars each. I usually do a tear down for inspection first and replace only bad parts or distorted orings, 4 stroke carb kits are way to expensive in my opinion but it is what it is.

 

[peterv6i]

Re: Yamah f80 carb - "neutral position" speed

Maybe I have solved the problem.
I have changed 2 spark plugs.. (all four about 5 months ago but I think that one of them was defect..)
Then I have removed a screw on each carb which is for drain..
Now all works fine..