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  1. #21
    CB750 Member gpounce's Avatar
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    Nov 2018
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    Baltimore, MD
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    14
    Got the forks sorted; made a oil seal installation tool out of 1 1/2" PVC pipe on the lathe, used a pair of bar clamps to press in the seals. Only had to replace one slider, the others in good shape. I chickened out and filled the tubes upside-down, cut down a funnel for a tight fit over the fork bottom tube, then poured in the fork oil. With the end and drain bolts tight then flipped each fork right-side up for the seals. Only forgot one of the spring clips, but just for a couple minutes

    Cleaned up the speedo gearbox, came out great- there was a bit of grease still in there beneath all the dirt- on a roll! Checked his front wheel bearings, one barely turns the other is frozen far as I can see using fingers... of course... so off to buy him some new front bearings & seals lol

  2. #22
    CB750 Addict pidjones's Avatar
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    Sep 2018
    Location
    East TN
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    272
    If the bearings are in with the same retaining ring my '79 has, you will see two dimples in the groove formed by the mating threads. Drill the dimple out ~1/16" (past the thread distortion). I made a removal tool out of a long piece of 3/8" scrap aluminum with two holes drilled the appropriate distance apart to match the holes in the retaining ring. I used drill bits with the shanks through the holes to insert into the ring and unscrew it. Used the same tool on the rear bearing retaining ring with an extra hole drilled for the bigger spacing.
    "Love 'em all.... Let GOD sort 'em out!"

  3. #23
    CB750 Member gpounce's Avatar
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    Nov 2018
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    Baltimore, MD
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    14
    Front wheel bearings replaced, they press in the usual way- rust coating the inside of the wheel from the water leaking in sheesh. So washed it out with alcohol, cleaned everything up and got the front end back together. I ran the engine a bit, the leak I thought was oil turned out to be gas dribbling out of the right-most carb, so I have a set of new seals & rings coming and will pull the bank back out this weekend. From chatting with my friend the engine sounds likeit runs way lean, unstable idle & liable to bog until warm which I noticed too- so I'll look into fuel/air adjustment but am not going to do a jet kit for him or start drilling the idle jets.

    The exhaust leaks seem primarily from the joints where the 4 downtubes enter the manifold unit under the engine, so I'll try to seal them as best I can- I don't think my friend is likely to pony up for a new exhaust and in any case I'm really skeptical about removing the exhaust- those studs look scary.

  4. #24
    CB750 Member gpounce's Avatar
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    Nov 2018
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    Baltimore, MD
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    14
    While the carbs were on the bench I looked into the pilot screws. 2 of them were at the OEM 2 3/4 adjustment, the other two were way lean because the pilot head pointers were set to the same position but getting the oddballs to the OEM adjustment meant they would need to unscrewed almost half a turn past the others. Given the bike has always been chronically lean I put all four pilot screws at 3 turns out.

    My friend came over for some bike therapy- we got the carbs back in,and the front brakes bled- happily the master cylinder is working. Engine started reasonably well and the idle was <<way>> better, though at least one cylinder is not firing well. He test rode the bike- even after the limited exercise the engine had started improving a bit. I did a quick field adjust of his idle stop but it needs more- and I'm going to do a carb sync given the dramatic improvement in engine performance. He did a couple high rpm drivebys- engine revved well, sounded good at speed. We'll see how it settles out.

    There is no oil leak, I took the opportunity to smell his exhaust- gas odor there presumably from the unhappy cylinder.(s) When he rode up, there was no smoke which did resume while he as at idle standing there. I put in some Wynns powershot, we'll see if it has much effect. He needs new tires, but thats his problem lol- new front bearings and overhauled front brake did great- very pleased with them.

    We parked the bike alongside the garage because I want to look into my R6 front forks- I'm a hypchondriac sometimes and want to check over the forks a bit. While we were getting his bike into place a storm came up, darned if he didn't say just leave it out in the rain "won't hurt it"- NO NO NO, its hurting ME lol so I put the cover on. I'm going to harrass him a bunch about that lol

    So anyway, this is looking like a successful job getting him back on the road.

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