Author Topic: Crankcase disaster.  (Read 1429 times)

Online SumpMagnet

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Re: Crankcase disaster.
« Reply #15 on: January 29, 2021, 08:45:37 PM »
looks better inside than I thought it would do.
CB750F2 - in pieces
CB900F Hornet - the daily transport

Offline philward

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Re: Crankcase disaster.
« Reply #16 on: January 29, 2021, 08:48:05 PM »
Good job so far!
Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline Seamus

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Re: Crankcase disaster.
« Reply #17 on: January 30, 2021, 08:54:33 AM »
Good luck with the repair, At least you know its possible.
Had similar with a K1 750, working on the motor and found a load of epoxy resin around the front of the sprocket. Damage where the chain had popped in for a visit. I was very fortunate as a mate had a bit of Kawasaki case that could be made to fit and had it welded up by an FIA approved aircraft welded. Only cost me a case of beer too.

Offline Johnny4428

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Re: Crankcase disaster.
« Reply #18 on: January 30, 2021, 11:06:04 AM »
Yes very annoying to discover the damage. I need to speak to a “metal smith” now and arrange repair. If the worst comes to the worst I know where to source replacement cases but would like to have these repaired.
1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1. Running resto,
1978 Honda CB550K3.
1999 ST1100 Pan European 50th Anniversary.
1975,1980,1984,1986 Honda C90’s
1973 Honda CB750K3

Offline Trigger

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Re: Crankcase disaster.
« Reply #19 on: January 30, 2021, 01:38:20 PM »
If you are going for a weld repair, make sure the gear box is in place as, some of the cogs are very close to the case  ;)

Offline Johnny4428

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Re: Crankcase disaster.
« Reply #20 on: January 30, 2021, 03:11:28 PM »
Crankshaft looks good within spec. Centre bearing shell looks iffy!
1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1. Running resto,
1978 Honda CB550K3.
1999 ST1100 Pan European 50th Anniversary.
1975,1980,1984,1986 Honda C90’s
1973 Honda CB750K3

Offline royhall

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Re: Crankcase disaster.
« Reply #21 on: January 30, 2021, 05:31:40 PM »
Can't believe your going to weld that. Plenty of good K3 cases out there.
Current bikes:
TriBsa CCM 350 Twin
Honda CB350F in Candy Bacchus Olive
Honda CB750F2 in Candy Apple Red
Triumph Trident 660 in Black/White
Triumph T100C
Suzuki GS1000HC
Honda CB450K0 Black Bomber
Honda CB750K5 in Planet Blue Metallic (Current Project)

Offline Johnny4428

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Re: Crankcase disaster.
« Reply #22 on: January 30, 2021, 09:47:04 PM »
I hear you Roy! That is just the kind of comments I need to ensure I do the right thing. Cheers.
1952 Cymoto on Triumph bicycle.
1961 Matchless G3
1974 Honda CB550K1. Running resto,
1978 Honda CB550K3.
1999 ST1100 Pan European 50th Anniversary.
1975,1980,1984,1986 Honda C90’s
1973 Honda CB750K3

 

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