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you do as you want.I will continue to ride like a pussycat with sore paws !!!
So for the curious, the gist of this damage is that gross misuse has stripped the teeth of 2nd and 3rd, locked up the free/splined cogs causing the shafts to rotate in their bearing housings and ramming the dowels down into the case where they have tried to exit. Subsequently the blind bearings are free(ish) to rotate as they want?That's some achievement.
Quote from: cb550k-aaron 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.CheersAaronI didn't post any gearbox Aaron, you sure your not giving me credit which should go to someone else, easy mistake to make but annoying if your that person and you don't at least get a thanks.Glad to see it's working out, mistakes can sometimes really be expensive, lets hope yours is now rectified. Did you seal the holes in the castings where the pins poked through, the clutch one isn't a big problem, if it leaks it just leaks into somewhere there is already oil but the sprocket side wants sealing at the very least.
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.CheersAaron
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:V5oAAOSwzRFabzr4If 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.