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Messages - cb550k-aaron
31
« on: April 10, 2018, 10:53:02 AM »
So I got the Gearbox that OddJob posted it's like new! Well Happy.
Got the pins fixed and the Bearings now sit where they should without moving in my Casings and everything looks good thankfully.
Just wanted to say thanks for all the help so far and will keep you all updated. Fingers crossed for everything being ok.
Cheers
Aaron
32
« on: April 05, 2018, 11:29:23 AM »
As OddJob states.
Not Stupidity but a lack of experience. It's a learning experience for us atm. Never seen the inside of an engine until this one was originally taken apart.
Any tips for what Grease or oil or sealer or whatever we need would be greatly appreciated.
The only parts in the Sump and attached to the Magnetic Sump Nut was Gear parts. Nothing else.
33
« on: April 04, 2018, 06:35:33 PM »
Ok let me know what it says  lol.
If I go the route of repairing this casing with the pins in the correct places. Can you give any tips or would u just replace?
Hard to say without measuring the cases up to find how much damage has been done.
Are there readily available specs that it should be? Tbh it hasn't done anymore than 150miles I'd say since the Pins were damaged.
34
« on: April 04, 2018, 06:16:12 PM »
Ok let me know what it says lol. If I go the route of repairing this casing with the pins in the correct places. Can you give any tips or would u just replace?
35
« on: April 04, 2018, 05:56:37 PM »
I disagree Oddjob, the pins are lower than the journal surface and I can see the marks on the journal where the bearing has turned and then gone tight and stopped as the engine heated up and the spun when it has cooled.
Seen this tooo much lately with customers engines, as they have tried to rebuild their own motor and then bring it to me saying, it is jumping out of gear.
In your opinion Trigger Is the spinning of the bearing the cause for the slipping and eventually the damage?
36
« on: April 04, 2018, 05:49:43 PM »
Those both look to be recent breaks, has the engine been apart recently?
Around 2 Years ago for a full overhaul. Them pictures were taken at that stage not recently. I added the bearing pictures etc to same link
37
« on: April 04, 2018, 03:58:11 PM »
I'm not sure if a bottom end IS the way to go TBH, there is a lot of damage sure BUT the problem is the new bottom end isn't guaranteed to be any better unless it comes with one of course. TwoWheelSpares on E-Bay have some complete engines but no bottom ends, your never sure on what the crank shells are going to be like on another engine, his may be new but they don't transfer as we know unless your really really lucky.
Really blowing the pics up shows what I suspect has happened, just above the mainshaft 3rd gear where it is missing 2 teeth there is another tooth with just the leading edge missing, I suspect this came off, jammed between the gear teeth just below it when second was engaged, this would mean this gear cluster was sitting to the left, when the 2 teeth came off they were in close proximity to countershaft second and they jammed between the 2 gears, would explain why no teeth are missing from mainshaft second, which is puzzling as you'd expect them to be meshed but again I think maybe third was in the process of being selected. The selectors look fine, which again is puzzling as you'd expect them to be the cause of this but they clearly aren't. Maybe the PO was a bit clumsy and started the process by catching the 3rd gear tooth edge. Looking again at the pics you can see new damage just under the primary chain and again to the left of that, these were no doubt the result of all the debris getting flung out of the gearbox.
I'm not convinced the bearing spun in the casings, I've never seen them do that before even when the knock pins are squashed flat to the case as in this case, I'd like to see some pics of those bearings in detail to say for sure though, if they had I'd expect to see some damage to the knock pins and I can't see that.
I'd also think about just replacing the entire box,
https://www.ebay.co.uk/itm/Honda-CB550-CB-550-K-F-Four-1974-1978-Gearbox-Gear-Box-Assembly/332536863177?hash=item4d6cbdd9c9:g:V5oAAOSwzRFabzr4
If you just buy a bottom end your going to need a complete set of gaskets as well, plus some time stripping both engines to see if there is any damage. However I'd also point out that the damage caused by crushing the 2 knock pins can sometimes be significant, I'd like to see pics of the sprocket area from the outside to see if the pin came through the casing and also of the clutch area for the same reason.
Oddjob, I've added two pictures of the pins where they burst the casing. These were sealed and are 100% no leaks etc. I'll take pictures of the bearings etc and upload them later on.
38
« on: April 04, 2018, 09:09:22 AM »
Yep, as if the bearing has spun in the casings, they are well and truly bug**ed. Basically a "Bottom end" is a complete engine minus head and barrels
 Sake lol. Ok anyone got a good bottom end for sale?
39
« on: April 04, 2018, 08:56:44 AM »
That has been assembled with total lack of care in the pasty and a different bottom end is the way to go rather than attempt a salvage job
With Bryan on this one. Just by the pictures, it needs a lot more than a couple of cogs 
Yea I get that, but the rest of the Gears are fine so is there any point replacing all of them?
Bar the Roller Bearing housing pins can you suggest what else I should be aware of?
I really appreciate all the help.
Thanks
Or when you guys say bottom end do you mean everything? Gears, casjngs, main shaft etc etc?
40
« on: April 04, 2018, 08:17:32 AM »
That has been assembled with total lack of care in the pasty and a different bottom end is the way to go rather than attempt a salvage job
With Bryan on this one. Just by the pictures, it needs a lot more than a couple of cogs
Yea I get that, but the rest of the Gears are fine so is there any point replacing all of them? Bar the Roller Bearing housing pins can you suggest what else I should be aware of? I really appreciate all the help. Thanks
41
« on: April 04, 2018, 06:55:42 AM »
I have most of the gears NOS from the 500, list the part numbers you want and I may have them, they do share some gear just not all.
23431374000 And 23441286020 Cheers let me know
42
« on: April 03, 2018, 09:59:45 PM »
Does anyone have any NOS of the gears I need before I get them elsewhere? I'd rather give to another member
43
« on: April 03, 2018, 08:59:31 PM »
I might looking a new bottom end tbh. Bar the gears do the selectors all look ok? I need to get parts ordered asap
44
« on: April 03, 2018, 07:56:27 PM »
Looks like its been to the dentist 
The damage is not caused by wear, it has been knocked down the gears at high speed to do that sort of carnage
A little worried that the roller bearing housing pins look flush in the journals.
I did notice that and some repairs to the casing too but seems to be well done. Would that be affecting anything internally? Do u think the selectors look ok etc?
45
« on: April 03, 2018, 06:38:59 PM »
It crunched when I was out last I was changing from 2-3rd, lest year it was slipping out of the gears but it never ever crunched on me
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