kide
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- Joined
- Aug 27, 2006
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- Gerry Ide
One of my other $$$$ sinks is Cushman scooters... another of the mechanical classics !!
Matt D:
The cracked jug on your Eagle motor - thought I'd show ya some pics of a '56 Eagle motor that's setting on my bench right now.. Stock, it's a 2 7/8 (2 .875) bore. Somewhere in its life it's been hogged out. The top of the cylinder is stamped 3.030 and the piston, from a later bore job is 3.050 ! I'm surprised that the fins aren't just stacked on top of each other!!! I took it to a race shop in our area that has a sonic bore measuring instrument. We found out that you can't measure a cylinder bore with fins as it sees the fin material as an extension of the wall thickness, but the trunk for the valve lifters is free of fins, and it checked at about .125 wall thickness, which the engineers say is safe on a low compression engine.
Here's the one I ride ('59 Super)
I put it together about 4 years ago.
Anyone else got 'em ??
Matt D:
The cracked jug on your Eagle motor - thought I'd show ya some pics of a '56 Eagle motor that's setting on my bench right now.. Stock, it's a 2 7/8 (2 .875) bore. Somewhere in its life it's been hogged out. The top of the cylinder is stamped 3.030 and the piston, from a later bore job is 3.050 ! I'm surprised that the fins aren't just stacked on top of each other!!! I took it to a race shop in our area that has a sonic bore measuring instrument. We found out that you can't measure a cylinder bore with fins as it sees the fin material as an extension of the wall thickness, but the trunk for the valve lifters is free of fins, and it checked at about .125 wall thickness, which the engineers say is safe on a low compression engine.
Here's the one I ride ('59 Super)
I put it together about 4 years ago.
Anyone else got 'em ??