Update 1.
I have found a suitable crank and con-rod for not a lot. I have questions out to my bearing supplier, and a full replacement set looks possible, again, for not a lot of money. So far so good. I could get the crank re-ground - but it would be a lot more expensive than a good second hand one.
The bit that is causing trouble is the piston. I was always under the impression that 070 pistons and Contra pistons were interchangeable. Well, after a few minutes with the capliers, I can confirm that the only dimensions they share are the bore (58mm) and the wrist pin diameter. The compression height (centre of wrist pin to top of piston is about 7mm too big on the 070, so if I fitted that to the Contra, it would smash through the top of the jug.
So where do I get Contra pistons from? I know where to get 66mm Contra-S pistons (I've got some....), but I don't have 58mm Contras. Would an 075/076 piston work? I've never seen one, so I have no idea of the dimensions. Any suggestions gratefully received...!
Belgian - thanks for the IPL, very useful!
I have found a suitable crank and con-rod for not a lot. I have questions out to my bearing supplier, and a full replacement set looks possible, again, for not a lot of money. So far so good. I could get the crank re-ground - but it would be a lot more expensive than a good second hand one.
The bit that is causing trouble is the piston. I was always under the impression that 070 pistons and Contra pistons were interchangeable. Well, after a few minutes with the capliers, I can confirm that the only dimensions they share are the bore (58mm) and the wrist pin diameter. The compression height (centre of wrist pin to top of piston is about 7mm too big on the 070, so if I fitted that to the Contra, it would smash through the top of the jug.
So where do I get Contra pistons from? I know where to get 66mm Contra-S pistons (I've got some....), but I don't have 58mm Contras. Would an 075/076 piston work? I've never seen one, so I have no idea of the dimensions. Any suggestions gratefully received...!
Assembled company? Is that like Y'all.
Belgian - thanks for the IPL, very useful!