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removing a piston rod from crank without taking apart the motor

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Old Dec 10, 2017 | 04:16 PM
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Default removing a piston rod from crank without taking apart the motor

Ok so long story short one of the valves broke and damaged the piston in my f2. Now I don't know how I was so lucky but there is no scaring on the cylinder head wall. I have a spare piston to replace it so I removed the oil pan and two bolts for the rod. But with the little space I have to work inside the bottom case I cant get the thing out. both pieces of the rod are still on the crank. Now I have to say that the motor is still bolted onto the bike and I really don't want to take the entire thing apart and pull the crank out. But I also don't want to break or damage anything. Any advise on how to get this rod out so maybe I will get some time in the spring to ride. Thanks.
 
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Old Dec 10, 2017 | 07:20 PM
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From: socal 949/951
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Piston and rod's come out the top. You must remove the cylinder head.
 
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Old Dec 14, 2017 | 10:16 AM
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Originally Posted by 74demon
Piston and rod's come out the top. You must remove the cylinder head.
​​​​​​
i know that part. Ive already removedthe head. I figured that was obvious that they need to come out of the top of the motor. The problem is i cant get the rod disloged from the crank. I took both rod bolts out but i cant just reach in there and pull it apart since ints still in the motor. So i need some advice on what i can use and do to accomplish that without damaging anything
 
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Old Dec 14, 2017 | 10:23 AM
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From: socal 949/951
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Turn the crank so the piston is down. Tap the rod bolts with a mallet, or use a soft punch if you can't get the mallet in there.

Be very careful to not let the threads touch the crank journals when taking the pistons out or putting them in. A piece of rubber hose on each will save your crankshaft.
 
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Old Dec 14, 2017 | 10:34 AM
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Originally Posted by 74demon
Turn the crank so the piston is down. Tap the rod bolts with a mallet, or use a soft punch if you can't get the mallet in there.

Be very careful to not let the threads touch the crank journals when taking the pistons out or putting them in. A piece of rubber hose on each will save your crankshaft.
Thanks! Ya definitely cant get a maller in there but can do a soft punch. Sounds like it will work great. And thanks for the tio about the threads
 
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