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Even worth trying to fix? (Read 174 times)
HillSavage
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Even worth trying to fix?
07/23/17 at 18:45:21
 
Hey all,
    Finally got into my motor, things do not look good.  As you can see the melted valve on the piston.  Any advice here?  I don't have much money and the motors that I am seeing are like 6-800 bucks.  Obi Wan Kenobi, you're my only hope.  Any thoughts?
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justin_o_guy2
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Re: Even worth trying to fix?
Reply #1 - 07/23/17 at 18:59:03
 
Cylinder and head condition is what you need to consider.
And Why did it do that?

You might be able to buy a whole top end, head, jug, piston.
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Gary_in_NJ
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Re: Even worth trying to fix?
Reply #2 - 07/23/17 at 19:09:08
 
Looks like a new top end for this engine. Dave has a head for sale in the marketplace. From there you'll need a new cylinder and piston kit. A big bore kit would be the way to go because it is less expensive then an OEM kit.

A used replacement engine is probably less of an initial investment, but you don't know what problems you are buying until things start to go wrong.
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justin_o_guy2
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Re: Even worth trying to fix?
Reply #3 - 07/23/17 at 19:20:22
 
The budget may make the call.

Year model can be a problem.
Not insurmountable, but not having to swap parts to get it to spark is nice.
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LANCER
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Re: Even worth trying to fix?
Reply #4 - 07/24/17 at 02:03:16
 
Get some good clear photos of the head, both the chamber and the cam bearing surfaces.  
Your piston is toast but I might like to take a look at it.
Check your cylinder closely after you have wiped it out really well and do it out in the sun light...you get a much better look that way.

How many miles were on the engine ?
Did your cam chain crap out on you ?

I believe I have all the parts you need, not new but good used ones if you want to save a LOT of money.  

PM me and we can talk about reviving your engine.
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Savageman
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Re: Even worth trying to fix?
Reply #5 - 07/26/17 at 12:16:58
 
In the picture is the piston all the way to TDC on it's stroke. If it is your rod is also bent therefore you would need a bottom end also.

See if the piston goes all the way up to top of bore.  Shocked
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Ruttly
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Re: Even worth trying to fix?
Reply #6 - 07/26/17 at 12:33:01
 
Can you say: LEAN

Or: 10,000 rpms in 7,000 rpm engine then missed a shift

Or: BOTH

Sad
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Ruttly
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Re: Even worth trying to fix?
Reply #7 - 07/26/17 at 12:36:09
 
Check warranty and/or bank balance !

Read that in a trouble shooting section in a old BSA manual.
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justin_o_guy2
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Re: Even worth trying to fix?
Reply #8 - 07/26/17 at 12:40:12
 
Get the crap off the piston before you move it.
Don't despair. A calm assessment of the situation is in order.
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Savageman
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Re: Even worth trying to fix?
Reply #9 - 07/26/17 at 12:53:48
 
Post some better pictures of the cylinder and head. I want to see the top of the piston after you chisel all that scrap metal off. Did it run out of oil and swallow the valves?
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Fast 650
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Re: Even worth trying to fix?
Reply #10 - 09/04/17 at 10:33:30
 
HillSavage wrote on 07/23/17 at 18:45:21:
Hey all,
    Finally got into my motor, things do not look good.  As you can see the melted valve on the piston.  Any advice here?  I don't have much money and the motors that I am seeing are like 6-800 bucks.  Obi Wan Kenobi, you're my only hope.  Any thoughts?


That looks almost as bad as what I am dealing with. P.O. got carried away with gasket goo and blocked all oil to the top end. But I found an engine from a low mileage wreck with a busted case. Low enough miles to have only had its first oil change before the accident. Swapped the cases and when finished I will have an essentially new engine.
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