Broken crankcase
- Thread starter Dellortoman
- Start date
G
Grant
Guest
No one is above the law of DHOTY surely?
G
Grant
Guest
Richard Cranium
padlock
Hero member
- Location
- bedford Uk
GPR1200 said:
Dellortoman
Hero member
- Location
- Tasmania, Australia
I thought you had to be a member of Club Laverda Queensland to be eligible. You weren't crazy enough to join were you Maurice?
Anyway, I don't blame Maurice the his rubbish advice
I was 99% sure it wouldn't bend back into place but thought I'd give it a try anyway. The bent bit had to be shifted one way or another, either by bending back or breaking off. The result determined the method of completing the job. I didn't want to pour buckets of weld metal into it so decided on the fibre/epoxy fix.
I reckon it would be possible to build an entire crankcase out of carbon fibre that would be lighter and stronger than cast alloy. I wonder if anyone has tried it. I have a vague recollection that Ford did something with composite polymer engines a few years ago. Could be an interesting experiment for Boba
I'll post some shots of the final repair when it's done. Haven't had a chance to get into the workshop for the last week or so. Got other problems to deal with. Life gets in the way sometimes.
Anyway, I don't blame Maurice the his rubbish advice
I was 99% sure it wouldn't bend back into place but thought I'd give it a try anyway. The bent bit had to be shifted one way or another, either by bending back or breaking off. The result determined the method of completing the job. I didn't want to pour buckets of weld metal into it so decided on the fibre/epoxy fix.
I reckon it would be possible to build an entire crankcase out of carbon fibre that would be lighter and stronger than cast alloy. I wonder if anyone has tried it. I have a vague recollection that Ford did something with composite polymer engines a few years ago. Could be an interesting experiment for Boba
I'll post some shots of the final repair when it's done. Haven't had a chance to get into the workshop for the last week or so. Got other problems to deal with. Life gets in the way sometimes.
mauricejota7604
Hero member
- Location
- Victoria Australia
You may not believe it Cam but I was a member of the QLD club quite a while before I became a mexican in the 1990s.
I had a similar flaw in a crankcase but mine tapped back into position maybe I was lucky
I had a similar flaw in a crankcase but mine tapped back into position maybe I was lucky
Dellortoman
Hero member
- Location
- Tasmania, Australia
As promised, photos of the repaired case where the chain took a bite out if it.
Repair is made with about 6 or 7 layers of glass cloth and epoxy resin. Epoxy bog on the outside (visible) surface, filed/sanded back and painted with "aluminium" coloured engine enamel and cured with a heat gun. It's not perfect but it'll do. It's never going to be a concourse bike (Cosi will have a go at me for my spelling of concourse).
It actually looks a bit better than the rest of the case, but after a few thousand km of grime, it will blend in nicely.
Apologies for the quality of the photo of the top side of the case. There was a bit of crap on the lens of the phone camera. If you want me wander out to the shed in the wind and rain to take a better photo, youse can all get fucked.
Cam
Repair is made with about 6 or 7 layers of glass cloth and epoxy resin. Epoxy bog on the outside (visible) surface, filed/sanded back and painted with "aluminium" coloured engine enamel and cured with a heat gun. It's not perfect but it'll do. It's never going to be a concourse bike (Cosi will have a go at me for my spelling of concourse).
It actually looks a bit better than the rest of the case, but after a few thousand km of grime, it will blend in nicely.
Apologies for the quality of the photo of the top side of the case. There was a bit of crap on the lens of the phone camera. If you want me wander out to the shed in the wind and rain to take a better photo, youse can all get fucked.
Cam
Attachments
3
3patC
Guest
Quite impressive for a bodge Cam.
T
Terry Dymond
Guest
Good result Cam; improvise, adapt, overcome!