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  1. Thread: Charging

    by amc49
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    http://www.cb750c.com/publicdocs/charging_system/g...

    http://www.cb750c.com/publicdocs/charging_system/genesound_charging_system.html

    The rotor is the issue 9 times out of 10, they can check as good and be bad when the windings then move under...
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    Make sure the fine threaded end of valve cut off...

    Make sure the fine threaded end of valve cut off in lower left of pic is all there. There is a valve inside it.

    Look at the oil supply port that comes up to the primary shaft SEAL, the upper case...
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    We had a couple of Hurst S/C Rambler Americans...

    We had a couple of Hurst S/C Rambler Americans around the shop for a while, the ones with the factory hood scoop and the 390 4 speed. Our street race car was a beater full weight AMX single 4 bbl....
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    We used to dragrace AMC AMX cars, the true ones...

    We used to dragrace AMC AMX cars, the true ones '68-'70.
  5. Thread: Hose from carbs

    by amc49
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    174

    Probably a main vent joining all 4 carbs up. The...

    Probably a main vent joining all 4 carbs up. The only reason it would be vacuum would be to power a vacuum fuel valve and those did not appear for a few more years.

    You can plug it and see, bike...
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    Got it, had assumed they were already out. If OEM...

    Got it, had assumed they were already out. If OEM then likely plastic ones and why the brass or bronze ones are better. Used them in my 550, the same size and pressed in fine and worked great.
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    Measure the bore in arm tubing and then increase...

    Measure the bore in arm tubing and then increase the number by .0005"-.0010" for the press. Bear in mind the ID may shrink a bit with the press.
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    You will likely be looking for an EXACT size to...

    You will likely be looking for an EXACT size to the decimal as the OD light pressfits into the arm tubing. You hammer them in lightly. So you need to estimate the amount of press (interference)...
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    The OEM tube filter WILL catch MOST of the rust...

    The OEM tube filter WILL catch MOST of the rust but the extremely fine portion gets by it because the plastic holes allow a certain small and smaller size particles to get by. You then find them in...
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    Red is fine.

    Red is fine.
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    FYI.........the '80 model used the same passage...

    FYI.........the '80 model used the same passage size spigots the rest of Hondas under 750 used back in the day. Meaning they are too small to begin with and any problem with them you get this...
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    You can pretty much go by how hard the gasket is...

    You can pretty much go by how hard the gasket is to tell the grommets. If the bolts can still be wobbled in the grommets in cover to feel like the rubber is giving with a bit of side force on the...
  13. Engine comes apart to fix it. The rods get...

    Engine comes apart to fix it. The rods get glassbeaded then you look at the clean part for pitting holes that later will snap the rod in half.
  14. Thread: 1974 CB750

    by amc49
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    233

    X2. Here in Texas you won't get that much for...

    X2. Here in Texas you won't get that much for one. But in the mix of buyers there will be one rich one that may do it. The norm is no though. More to the order of the $3k mentioned. Here we buy...
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    Are you sure the second '1' is correct? ALL DOHC...

    Are you sure the second '1' is correct? ALL DOHC should have begun with 2000-XXX numbers, no 1000-XXX. The first 2000 is actually 2000049, I guess they built roughly 50 bikes to check out the line...
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    Good on you. I do the same now. I was always...

    Good on you. I do the same now.

    I was always ahead on maintenance on the cars and bikes and spent some guessing parts had to be better than they do. Getting older I now use many parts longer than...
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    Having said that I would 1st choice also likely...

    Having said that I would 1st choice also likely reuse the same chain if it hasn't been revved forever, it is already proven out. 8K not being that many miles. Age from sitting will not affect that...
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    Chain wear is directly linked to how tight it...

    Chain wear is directly linked to how tight it gets kept in tension, if you are on top of it it lasts longer.

    Link you have to do yourself is fine if you know what the staked part is supposed to...
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    Not saying don't enjoy it, just watch any going...

    Not saying don't enjoy it, just watch any going over 10K rpm. They do it too easy.

    It's a shame so many others never get to experience how well they can run. I know the feeling once you hit that...
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    Careful, you'll pop a rod. The engines can be...

    Careful, you'll pop a rod. The engines can be made to run higher rpm but it really produces no more power and all they do is pop rods and timing chains. Why we tend to advance cams to keep the power...
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    You have no idea of how that disc is spaced in...

    You have no idea of how that disc is spaced in relation to the other one. And if disc OD is different there are other issues.
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    I doubt it. The front has several differences,...

    I doubt it. The front has several differences, disk is 5 bolt to 6, mounting of caliper is totally different, speedo drive appears to switch side, making it turn backwards.
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    I'd question the 'brand new' gas. Where did it...

    I'd question the 'brand new' gas. Where did it come from?

    If you have ethanol tank damage as in rust then you should know the plastic OEM petcock filter will let some of the smaller particles in...
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    https://www.partzilla.com/catalog/honda/motorcycle...

    https://www.partzilla.com/catalog/honda/motorcycle/1979/cb750l-a/swingarm-chain-case

    Loosen axle and then chain adjusters both sides and swing them down and out of the way. Part #7 merely sits in...
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    Look at the part distributor channels like Dennis...

    Look at the part distributor channels like Dennis Kirk, often they tell you the number of links in the chain.

    When you switch to the 530 sprockets you may not have the same tooth count meaning...
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