1980 Honda CM 400t Carb drain problem.

Message
Author
jmloftus
Rookie
Rookie
Posts: 5
Joined: Tue May 27, 2014 2:17 pm
Sex: Male
My Motorcycle: 1980 Honda CM 400t

1980 Honda CM 400t Carb drain problem.

#1 Unread post by jmloftus »

Hello all, I have a 1980 Honda CM 400t and I drained the carbs last night. When I screwed the drain plug back in there were no leaks or drainage coming from the lines last night. Today when I started it up the carbs continue to drain until I shut the fuel line off. I can't think of what could have changed from last night to today and am wondering if anyone might know the cause of the drainage. Thanks.

User avatar
BRUMBEAR
Legendary 1000
Legendary 1000
Posts: 1227
Joined: Sat Feb 04, 2006 3:27 am
Real Name: Dave
Sex: Male
Years Riding: 40
My Motorcycle: 2009 Buell 1125 CR
Location: in limbo

Re: 1980 Honda CM 400t Carb drain problem.

#2 Unread post by BRUMBEAR »

float pin or float is probably stuck put a pan under it turn on the fuel and tap the carb with a wrench and see if it busts loose.
there aint nothin like it

jmloftus
Rookie
Rookie
Posts: 5
Joined: Tue May 27, 2014 2:17 pm
Sex: Male
My Motorcycle: 1980 Honda CM 400t

Re: 1980 Honda CM 400t Carb drain problem.

#3 Unread post by jmloftus »

Thanks for the reply. I tried tapping the carbs while the fuel was on, but the draining never stopped.

User avatar
BRUMBEAR
Legendary 1000
Legendary 1000
Posts: 1227
Joined: Sat Feb 04, 2006 3:27 am
Real Name: Dave
Sex: Male
Years Riding: 40
My Motorcycle: 2009 Buell 1125 CR
Location: in limbo

Re: 1980 Honda CM 400t Carb drain problem.

#4 Unread post by BRUMBEAR »

Then ya gotta pull them off check you tube for a good cleaning video they are not that hard to clean but you mat want to have a gasket kit available with the age of the carbs.
there aint nothin like it

jmloftus
Rookie
Rookie
Posts: 5
Joined: Tue May 27, 2014 2:17 pm
Sex: Male
My Motorcycle: 1980 Honda CM 400t

Re: 1980 Honda CM 400t Carb drain problem.

#5 Unread post by jmloftus »

finally got around to pulling the carbs and attempting to clean them, but the screws on the float bowl are all stripped. I put the carbs back on the bike and the gas leaked has stoppped, but now the right carb isn't firing and the pipe on the right side is warm at best after letting it idle, while the left side is hot. Any advice on removing these stripped screws or what the issue with the right side carb could be? Thanks for the help.

jmloftus
Rookie
Rookie
Posts: 5
Joined: Tue May 27, 2014 2:17 pm
Sex: Male
My Motorcycle: 1980 Honda CM 400t

Re: 1980 Honda CM 400t Carb drain problem.

#6 Unread post by jmloftus »

also it will only stay idling with full choke, it dies quickly after I release the choke.

User avatar
Johnj
Site Supporter - Platinum
Site Supporter - Platinum
Posts: 3806
Joined: Fri Nov 17, 2006 7:34 am
Real Name: Johnny Strabler
Sex: Male
Years Riding: 34
My Motorcycle: A Bolt of Lightning
Location: Kansas City KS

Re: 1980 Honda CM 400t Carb drain problem.

#7 Unread post by Johnj »

Your description says the intake is leaking air.
People say I'm stupid and apathetic. I don't know what that means, and I don't care.
Image
Always wear a helmet, eye protection, and protective clothing. Never ride under the influence of drugs or alcohol.

jmloftus
Rookie
Rookie
Posts: 5
Joined: Tue May 27, 2014 2:17 pm
Sex: Male
My Motorcycle: 1980 Honda CM 400t

Re: 1980 Honda CM 400t Carb drain problem.

#8 Unread post by jmloftus »

Thanks for the reply, the boots are in pretty bad shape. I'll have to look for some replacements. Thanks again.

Post Reply