Re: New 750f2 owner, member intro & few ?'s.... Carb issues for now
Posted by Matt Story on Aug 15, 2012; 12:30am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/New-750f2-owner-member-intro-few-s-Carb-issues-for-now-tp4026717p4027122.html
I haven't ordered any carb parts because I need some other stuff and I want to minimize the number of orders. vintagecb750 offers free shipping for orders over $150. I'm thinking I'll probably have to do that twice.
Other than carb work, the brakes need to be gone thru. A PO had taken the master cylinders off. I managed to get both front and rear fully apart. I was able to press the front assy apart thru the hose connection. It didn't come aprt easy, but after apart and cleaned up, things look really good except for the wasted boot. The clymer pics show more parts than what I came out of mine. It looks like I might be missing a piece at the bottom of the bore that Clymer calls a check valve. A separate rebuild kit is available for 77 and 78 750f bikes, and they are a bit different. The 78 version includes an extra piece that may be a check valve. The 77 kit does not. Can anyone offer comment? is the check valve version better? Is is compatible?
The rear was not so easy. The piston was stuck in crud. I tried to use air pressure, but it refused. It would move in, not out. I let it rest for a while to think it over. I got an idea to hydraulically push it out. I didn't have any handy way to connect it to another M/C. What I came up with was to fill it with grease, plug the extra hole and push a 'piston' into the the hose connection. I didn't get that far. I very loosely cross threaded my grease gun fitting into the hose port. The hose popped out once, and I snugged it a tiny bit more. I pumped the cavity full. Before I knew it the piston popped out onto the floor. Once apart and clean, everything looks pretty good except that clevis link is fairly corroded. Below is a pic of it disassembled. I have a couple points to consider looking at the parts.
All the pieces look good except the spherical plunger that connects to the pedal. The ballstud is pretty corroded, and I'm not sure about the washer that is captive on the stud. It is pretty rusted up. Its hard to tell from the pic, but it is also dished out. I can't tell if it is that way by design, or because some ham-fisted mechanic deformed it trying to pull it without removing the snap ring. Is it supposed to be dished? The ball stud and washer don't come in the M/C rebuild kit for a 77 750f. The Honda kit for a 75-76 750f includes the ball stud. Will the earlier kit fit a 77 model? Here is a pic of the early kit:
Strangely, the early kit includes what looks like the check valve in the later ('78) Front M/C rebuild kit. I am curious why Honda would remove the check valve from the rear assy after '76, and add the check valve to the front assy after '77. Am I seeing it correctly?
Here is a pic of the kit desiganted for 77 750F
What do you guys think?
I am headed out to the garage to start my Guzzi tank rust removal using electrolysis. I let you know how it goes. I expect well.
Sorry for the pic sizes, and thanks for your time.
Matt
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/New-750f2-owner-member-intro-few-s-Carb-issues-for-now-tp4026717p4027122.html
I haven't ordered any carb parts because I need some other stuff and I want to minimize the number of orders. vintagecb750 offers free shipping for orders over $150. I'm thinking I'll probably have to do that twice.
Other than carb work, the brakes need to be gone thru. A PO had taken the master cylinders off. I managed to get both front and rear fully apart. I was able to press the front assy apart thru the hose connection. It didn't come aprt easy, but after apart and cleaned up, things look really good except for the wasted boot. The clymer pics show more parts than what I came out of mine. It looks like I might be missing a piece at the bottom of the bore that Clymer calls a check valve. A separate rebuild kit is available for 77 and 78 750f bikes, and they are a bit different. The 78 version includes an extra piece that may be a check valve. The 77 kit does not. Can anyone offer comment? is the check valve version better? Is is compatible?
The rear was not so easy. The piston was stuck in crud. I tried to use air pressure, but it refused. It would move in, not out. I let it rest for a while to think it over. I got an idea to hydraulically push it out. I didn't have any handy way to connect it to another M/C. What I came up with was to fill it with grease, plug the extra hole and push a 'piston' into the the hose connection. I didn't get that far. I very loosely cross threaded my grease gun fitting into the hose port. The hose popped out once, and I snugged it a tiny bit more. I pumped the cavity full. Before I knew it the piston popped out onto the floor. Once apart and clean, everything looks pretty good except that clevis link is fairly corroded. Below is a pic of it disassembled. I have a couple points to consider looking at the parts.
All the pieces look good except the spherical plunger that connects to the pedal. The ballstud is pretty corroded, and I'm not sure about the washer that is captive on the stud. It is pretty rusted up. Its hard to tell from the pic, but it is also dished out. I can't tell if it is that way by design, or because some ham-fisted mechanic deformed it trying to pull it without removing the snap ring. Is it supposed to be dished? The ball stud and washer don't come in the M/C rebuild kit for a 77 750f. The Honda kit for a 75-76 750f includes the ball stud. Will the earlier kit fit a 77 model? Here is a pic of the early kit:
Strangely, the early kit includes what looks like the check valve in the later ('78) Front M/C rebuild kit. I am curious why Honda would remove the check valve from the rear assy after '76, and add the check valve to the front assy after '77. Am I seeing it correctly?
Here is a pic of the kit desiganted for 77 750F
What do you guys think?
I am headed out to the garage to start my Guzzi tank rust removal using electrolysis. I let you know how it goes. I expect well.
Sorry for the pic sizes, and thanks for your time.
Matt
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