Topic: o rings

[little honda]

    hi to all,
my question is i have a Honda CB 350f and i am going to totally rebuild the carbs. it never has idled right. what size are the o rings that go on the fuel tubes that go in between the carbs that feed the units? thank you for your help.
                                                                                                                mike

[Bodi]

Someone else may know the size, if you only need those.
I buy the Honda OEM carb gasket kits. Not really cheap, but all the O rings you need are in the kit plus a bowl gasket and a cap gasket. The bowl gasket, unlike Keyster ones, does not swell in gasoline.
If you get 4 gasket kits you will end up with an extra set of fuel tube O-rings. Each kit contains a set but you only need three.

[little honda]

thank you for your reply, but i am looking for just those o rings as i have already rebuilt the rest of the carb assy.

                                                                            mike

[Kevin400F]

I have been using 5.8mm ID x 1.9mm cross-section.

You need 12 total (four each on the tee and the two joining connectors).

Kevin

[little honda]

Kevin, thankyou for your reply. that helps alot. sorry it took so long to reply, I've been gone. again thanks. by the way i put one of your brake pistons in my 350f five years ago and it's still working great!!
                                                                                mike

[Kevin400F]

Thanks for the feedback on the brake piston.

I recently ordered another big box of the phenolic piston "blanks" from the manufacturer.  Their prices, as well as the minimum quantity they require me to buy have both gone up, but I'm still dealing with the same salesperson on their end and we have a good working relationship.  

Not to hijack the thread, but I currently have plenty of stock on hand if anyone needs a 38mm (1.50 inch) diameter brake piston.  Price to forum members is $34, shipping included, for the type used on the 350F through 550.  The pre-77 750K's brake pistons are a little higher due to the more difficult machining required to fit the domed end cap.