The feedback I about Zane cranks when they need to be rebuilt is that they sound noisy. To me noisy is a subjective measurement, and the lid was off when I got it handed to me.
I have other information that a good breganze crank will turn about 2.8 degrees without deflection on a dial gauge.
I've just stuck a dial gauge on the top of her basket case 668, and so far, only on the left cylinder at tdc, and I'm getting about 4.8 degrees with less than .0002" deflection on the dial guage. However, there is not certainty looking at the dial guage ( after beers) and at tdc for no movement, so
I took a reading 001" btc and 001" atc. 6 degrees neat.
Naturally I will have to do both pots. Will doing the measurements at bdc make any difference?
If the crank is ok, and I check it every oil change, can anyone give me a tolerance limit whereby I pull it off the road and have the crank rebuilt?
For those new school blokes that live in the metric world, .0002" =0.0058mm(?), or a fraction of a friggometre and 0.001" = about ).0254mm ? (a fairy's fart??)??? and degrees is not the temperature......
The measurements were done with continual turning of the crank in one direction. I noted that if I turned the crank in the reverse direction, that tdc varied by about 1.5 thou. I don't understand that. :-X
I have other information that a good breganze crank will turn about 2.8 degrees without deflection on a dial gauge.
I've just stuck a dial gauge on the top of her basket case 668, and so far, only on the left cylinder at tdc, and I'm getting about 4.8 degrees with less than .0002" deflection on the dial guage. However, there is not certainty looking at the dial guage ( after beers) and at tdc for no movement, so
I took a reading 001" btc and 001" atc. 6 degrees neat.
Naturally I will have to do both pots. Will doing the measurements at bdc make any difference?
If the crank is ok, and I check it every oil change, can anyone give me a tolerance limit whereby I pull it off the road and have the crank rebuilt?
For those new school blokes that live in the metric world, .0002" =0.0058mm(?), or a fraction of a friggometre and 0.001" = about ).0254mm ? (a fairy's fart??)??? and degrees is not the temperature......
The measurements were done with continual turning of the crank in one direction. I noted that if I turned the crank in the reverse direction, that tdc varied by about 1.5 thou. I don't understand that. :-X