CB750K Help continued

[Old Ryder]

One of the big problems from bikes of the 70s-80s that sat for a long period of time, was that the inside of the gasoline tank would rust and clog up the fuel system. I remember reading and buying a chemical that would paint your tank from the inside. Prep work included putting a bunch of BBs in the tank and swirling them around to clean the rust.

I also dealt with carb floats not sealing. Also, if one of the floats has a hole in it, that will cause the same problem. Or it may be---with the ethanol in the gasoline, the rubber seals have eaten away. Seen that, too.

[stevenolts]

I started the bike again today and the overflow tubes were not leaking when the bike was running. I took it for a test ride and it is running real strong. Once I sink the carbs and make a few adjustments to the idle it should be running great.

When I got back and put it away I saw gas on the ground. It may be only when the engine is off now like before I started. It is freezing today / yesterday was 68 degrees. So that will be all for today.

I will pick it back up again in a few days / hopefully it will be warmer then. I will pull the carbs again and do a little better job of cleaning. I plan to clean out the low speed jet with an e-string (I have one ready) / I will also polish the float valve seat and check the tubes for leaks to stop the pissing fuel out of the overflow tubes.

A few questions:

1. Do I just polish the seat? Do I do anything to the float valve rubber tip. When I lapped the valves on my lawn mower I put compound on the valve and spun it with the suction cup rod to match the valve to the seat.

2. Should the floats / float valve be springy once installed? I see videos with a different version where there is a spring in the assembly / I have a 81 CB750K which has no spring or adjustment as far as I can tell.

3. Where would you buy replacement O-ring clamps for tor the carburetor engine side boots. The ones I have don't seem to get tight enough and the carbs seem to slip out if moved a little. I see that Randak's has them but they are very expensive. I replaced the air box side boots / I ordered through Honda parts.

I am learning a lot along the way.

Thank you for your help. You guys are great!!!
Steve

[stevenolts]

One thing I already knew but has been driven into my head again is how great fuel injection is.
I use fuel conditioner in my tanks for the motorcycles, lawn mower, and trimmer.

[Old Ryder]

I started the bike again today and the overflow tubes were not leaking when the bike was running. I took it for a test ride and it is running real strong. Once I sink the carbs and make a few adjustments to the idle it should be running great.

When I got back and put it away I saw gas on the ground. It may be only when the engine is off now like before I started. It is freezing today / yesterday was 68 degrees. So that will be all for today.

I will pick it back up again in a few days / hopefully it will be warmer then. I will pull the carbs again and do a little better job of cleaning. I plan to clean out the low speed jet with an e-string (I have one ready) / I will also polish the float valve seat and check the tubes for leaks to stop the pissing fuel out of the overflow tubes.

A few questions:

1. Do I just polish the seat? Do I do anything to the float valve rubber tip. When I lapped the valves on my lawn mower I put compound on the valve and spun it with the suction cup rod to match the valve to the seat.

2. Should the floats / float valve be springy once installed? I see videos with a different version where there is a spring in the assembly / I have a 81 CB750K which has no spring or adjustment as far as I can tell.

3. Where would you buy replacement O-ring clamps for tor the carburetor engine side boots. The ones I have don't seem to get tight enough and the carbs seem to slip out if moved a little. I see that Randak's has them but they are very expensive. I replaced the air box side boots / I ordered through Honda parts.

I am learning a lot along the way.

Thank you for your help. You guys are great!!!
Steve

http://www.partzilla.com/parts/searc...FRGHswodxrsIiA

[DMAGOLDRDR]

Check out Randakk Cycle Shack. He is a 70s Honda Motorcycle restorer and supplies hard to find parts. I have used him a few times for my 1978 and 1979 GL1000s

http://randakks.com/collections/honda-dohc4

As you can see from the pic's I like my old Honda.