Honda-SOHC

SOHC.co.uk Forums => Other Bikes => Topic started by: RGP750 on January 19, 2019, 05:27:37 PM

Title: carb problem
Post by: RGP750 on January 19, 2019, 05:27:37 PM: Hi Guys
Not sure what is happening here??
Almost finished a CB175 for a mate in Wales and started today and when I CLOSE the choke the engine revs rise a great deal.
Can anyone tell me what is going on as I haven't a clue .
Cheers Rich
Title: Re: carb problem
Post by: Nurse Julie on January 19, 2019, 06:45:32 PM: Just a bit of girlie logic.
Are they opening when you think they are closing and vice versa?
ie, are you operating the lever in the correct direction.?
Title: Re: carb problem
Post by: RGP750 on January 19, 2019, 06:57:11 PM: yes Julie same principal as the 750 Weird ????
Title: Re: carb problem
Post by: Nurse Julie on January 19, 2019, 06:59:50 PM: Quote from: RGP750 on January 19, 2019, 06:57:11 PM
yes Julie same principal as the 750 Weird ????
Weird indeed Richard.
Title: Re: carb problem
Post by: Rob62 on January 22, 2019, 08:31:26 PM: When you lean off the mixture the revs rise.... as long as it starts ok with choke in the cold and then runs ok without choke when warmed up, without being too lean. Its ok.

It may be initially set up too rich so the choke is killing it and the rich condition means it run ok without choke when cold.... whats it like when its fully warmed up?
Title: Re: carb problem
Post by: RGP750 on January 23, 2019, 06:58:07 PM: Hi Rob
I put another set of carbs on and all is fine .
I couldn't shut the choke without the revs rising to 8000 weird.
Title: Re: carb problem
Post by: Rob62 on January 24, 2019, 12:42:42 PM: wow! that is weird... did you get chance to examine the carbs to see if you could spot the issue? would be interesting to know..