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CB750F2 .... silk purse from a sows ear.
UK Pete:
--- Quote from: kent400 on September 22, 2018, 12:55:28 PM ---There's www.colmorfinishing.co.uk based in Borough Green Kent. Small operation, little more than one man and a dog. Always seems to be a fairly quick turn-around
Picked up these a few days ago charged £40. Think there were 14 of them.
--- End quote ---
I might try these people out it's quite near for me
Did you have to do any prep, I might see what there coming prices are like as well
Sent from my SM-G930F using Tapatalk
SumpMagnet:
It's funny....but some days go from triumph to disasdter in very short order.
The triumph first.....
Having given up on the home made attempts at making a clutch tool, I had oprdered a cheap one from China as a whole lot of Hondas seem to use a 24mm peg spanner for clutch centres, and I got one for the princely sum of £4....posted....so I figured what the hell and bought oner to give it a go. Took a couple of weeks to turn up, but worked brilliantly. Was a tight fit in the pegs, and a few judicious taps on the ratchet, and the nut came loose. Hooray. Notoced some odd scratches on the back of the clutch centre...but nothing too bad looking.
Ot came the clutch centre and all the plates. Some wear and tear...but usable. Will need a good clean as they are gummy and fairly well stuck together but there is enough left on the friction plates not to have me running off to buy new. I might.....but that depends.
Dug out the puller, and gave it a quick mod to thin it down to use the hole near the gickstart gear and stay nice and central. Found a plug to fit into the end of the shaft to ensure no damage from the puller. Figured all was good to go.
Dug out the circlip pliers to remove the large circlip on the shaft at the centre....and found the clip came off really easily. TOO easily.......
Popped the basket off and had a good look at the end of the shaft.....and the swearing started. Lots of it. Loudly. Some things got kicked as well.
The ends of the shaft where the clip should locate were rough and jagged. A quick delve in the oil pools under the clutch found a few fragments that clearly used to live there.
Now I don't think the engine was run like this....as the shards were clean and sharp but I now need to find out what I have to replace...as I cannot rebuild it like this.
Looks to me like someone removed the basket with a crowbar and never took the clip off. I counted 7 'broken' places on the shaft....and have 3 shards. When I split the cases I am going to have to look REALLY carefully as the other bits have got to have gone somewhere. If I am lucky...they fired out when it happened. At least they were not in the top end, the sump or the oil strainer. The bits I found were in the dimpled recesses in the bottom of the clutch area.
Gave me that sick feeling when I found them....and a sudden pain in the wallet area.
K2-K6:
Oooooh, that doesn't look good :(
What is that marking on the bearing housing at about 11 o'clock? Is it a shadow of casting mark or damage?
SumpMagnet:
Casting mark as far as I can tell.
I have been studying all the pictures I have of the gearbox shafts etc. trying to work out exactly what it is I have to replace here. I assumed it was the end of the layshaft...but none of the manual diagrams I have seem to look like what I am seeing.
The damaged splines are the ones for the clutch basket....and the smaller ones for the clutch centre. So presumably...the inner part is not attached to the outer part.
What part is it I need to source?
K2-K6:
The drive comes in to the outer clutch basket from primary drive assembly through that damaged hollow shaft. It's this component that will have to be replaced.
It gets transmitted through clutch plates and clutch centre to the central shaft to gear assembly, passing back through that first hollow shaft. Which appears undamaged.
Hope that makes sense :)
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