Is it a 38 or a 41?
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Road Captain
Joined: Feb 2006
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From: Cleveland, OH - Longing for Savannah, GA
Is it a 38 or a 41?
Hello,
I do believe this carb needs a rebuild since a tap on the body does not stop this profuse leak of fuel out the overflow. Anyhow, I can see no indication as to whether it is a 38 or a 41mm Bendix carb. I know I have a 76 engine and I do believe it is a late 76 so I am not sure what size it is or if the specs on the rebuild box (38 or 41) even makes a difference? Any ideas? Also, what percentage would you guys say that if I rebuild it the leak problem will be solved? In other words, will a rebuild more than likely take care of the problem? Thanks
I do believe this carb needs a rebuild since a tap on the body does not stop this profuse leak of fuel out the overflow. Anyhow, I can see no indication as to whether it is a 38 or a 41mm Bendix carb. I know I have a 76 engine and I do believe it is a late 76 so I am not sure what size it is or if the specs on the rebuild box (38 or 41) even makes a difference? Any ideas? Also, what percentage would you guys say that if I rebuild it the leak problem will be solved? In other words, will a rebuild more than likely take care of the problem? Thanks
Seasoned HDF Member
Joined: Dec 2004
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From: Texas! Ya mean there's someplace else?
RE: Is it a 38 or a 41?
Stock Bendix carbs were 38 mm. Never heard of the 41 mm, but have seen 44 mm. Usually if it's flooding just replacing the valve fixes it. If it's been sitting around a spell, slapping a kit in it is a good idea. Some kits used to come with bushings for the throttle plate and choke shafts. I'd recommend not replacing these unless you can prove they're leaking.
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
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From: Houston Texas
RE: Is it a 38 or a 41?
Butcher......The carb leak is because the float has stuck in the down position. A repair kit would include a new needle, accelerator pump, gaskets and 'O' rings, and a few other small items.
Last time I bought one there were two choices: A cheap import ($17) and a complete kit that is made in USA for $38. I strongly recommend that you go with the USA kit. Reason for that is because the pump part is much better part than the import. Easier to install as well. I'd get it from J&B Cycles.
There is a small 'O' ring that is located on the main metering tube where it screws into the carb body. Make sure that this particular 'O' ring is in good shape, ie, install a new one from the kit. If you need some extras, go to Lowes plumbing department and get a bag of ten #5 washers for $1.30 to have on hand.
I learned a hard lesson about this nasty little 'O' ring after riding my Sporty for more than a year with the plugs wet fouling out at highway speeds. When the ring goes bad it allows fuel to leak around the metering body and as a result dumps raw fuel right into the heads. Then you have black sooty plugs while running at 60 mph. Yeah, it took me that long to find this problem.
The proper size carb is a 38mm. The 41mm (44mm?) would be for the big twin and you do not want that one. Just get a kit for a 38mm and that should work. Be sure to put the carb body in some carb cleaner for an hour or so. The kit should rejuvinate the carb, and a new float needle should seal completely.
The needle that is in the carb now may be scratched around the sealing area and letting fuel flow by, but most likely it is just a stuck float.........pg
Last time I bought one there were two choices: A cheap import ($17) and a complete kit that is made in USA for $38. I strongly recommend that you go with the USA kit. Reason for that is because the pump part is much better part than the import. Easier to install as well. I'd get it from J&B Cycles.
There is a small 'O' ring that is located on the main metering tube where it screws into the carb body. Make sure that this particular 'O' ring is in good shape, ie, install a new one from the kit. If you need some extras, go to Lowes plumbing department and get a bag of ten #5 washers for $1.30 to have on hand.
I learned a hard lesson about this nasty little 'O' ring after riding my Sporty for more than a year with the plugs wet fouling out at highway speeds. When the ring goes bad it allows fuel to leak around the metering body and as a result dumps raw fuel right into the heads. Then you have black sooty plugs while running at 60 mph. Yeah, it took me that long to find this problem.
The proper size carb is a 38mm. The 41mm (44mm?) would be for the big twin and you do not want that one. Just get a kit for a 38mm and that should work. Be sure to put the carb body in some carb cleaner for an hour or so. The kit should rejuvinate the carb, and a new float needle should seal completely.
The needle that is in the carb now may be scratched around the sealing area and letting fuel flow by, but most likely it is just a stuck float.........pg
Thread Starter
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Road Captain
Joined: Feb 2006
Posts: 507
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From: Cleveland, OH - Longing for Savannah, GA
RE: Is it a 38 or a 41?
thanks you guys......I will get the 38mm kit. in the meanwhile Merry Christmas to you all and thanks for the help once again.
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