700 red head crank bearings

Wrenchmaster

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Jan 24, 2011

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B.C. Canada

• Dec 16, 2014

• #1

Picked up another mountain max, needs a top end, I'm going to use my spare top end on it. It melted the mag side piston, looks like the seal was leaking in the crank case. I need to find out the best way to get the mag & PTO bearings off the crank. Took 5 tons on my press to get one off a junk crank I'm practicing on. Also thinking of welding the pins on this one while it's out, anyone done this before?

 

Wrenchmaster

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B.C. Canada

• Dec 18, 2014

• #2

Anyone recognize this work? The cranks been rebuilt and cylinders ported, scribed numbers on the crank and case.

 

RX-1MT

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Butte Montana

• Dec 19, 2014

• #3

If you want a little more power and a cleaner bottom end take them cylinders to a machine shop and have a 1/4" cut off the cylinder skirt on the intake side..

 

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B.C. Canada

• Dec 23, 2014

• #4

The skirts have been cut on the sides as you can see in the picture, can you safely take more off the bottom? I've got a stock set that I'm going to use on this engine, I'll try that with them before I put em on.

 

RX-1MT

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Butte Montana

• Dec 23, 2014

• #5

I use to cut them straight across it made the reed area clear and made the throttle response nice and crisp..