Author Topic: Solo 680 piston  (Read 961 times)

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Offline Riddler1100

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Solo 680 piston
« on: March 19, 2015, 07:54:52 pm »
Hi I'm trying to find a solo 680 piston, may possibly need cylinder head also haven't pulled it apart yet. I'm located in Australia

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Offline Cut4fun .

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Re: Solo 680 piston
« Reply #1 on: March 19, 2015, 08:05:19 pm »
Ideas

I've put 064 pistons in Solo 680's and just recently was toying with a BB044 piston and one other that I can't remember in a stroked 680...



Adam is the guy into the solo
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Offline adam32

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Re: Solo 680 piston
« Reply #2 on: March 19, 2015, 09:43:10 pm »
Yup. A Stihl 064 piston fits with a little work to clear the rod end.

Offline Riddler1100

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Re: Solo 680 piston
« Reply #3 on: March 20, 2015, 02:52:50 am »
What kind of modifying is required?? To use the 064 piston

Offline adam32

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Re: Solo 680 piston
« Reply #4 on: March 20, 2015, 10:10:55 am »
What kind of modifying is required?? To use the 064 piston

Use a flat file and relieve the inside of the piston bosses where the rod goes in. The rod on the 680 is wider then the Stihl. Pretty easy, takes about 15 minutes. Its hard to explain but once you see it its is pretty obvious.

Offline Cut4fun .

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Re: Solo 680 piston
« Reply #5 on: March 20, 2015, 12:44:17 pm »
I have to open wrist pin bosses to run the stihl 066 pistons in my poulan 505 for same reason. or if you use the 064 in the 475.
It is easy to do. If I can do it anyone can.
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Offline farmboy

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Re: Solo 680 piston
« Reply #6 on: March 20, 2015, 09:12:27 pm »
Yup. A Stihl 064 piston fits with a little work to clear the rod end.
Thanks for info I've got a pretty nice 680 I bought for the coil has scored piston.  Didn't need the coil after all the plug boot had come off the wire just far enough no spark.  Bought it to fix my very low hr. 603.
Shep

Offline Riddler1100

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Re: Solo 680 piston
« Reply #7 on: March 21, 2015, 03:07:32 am »
Thanks guys, I'm assuming the piston bosses are fairly easy to just file... Is there a certain "clearance" the pin bosses should be from the crank rod end?? Or does it have to be reasonably tight fit??

Thanks again guys

Offline aclarke

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Re: Solo 680 piston
« Reply #8 on: March 21, 2015, 10:50:59 am »
A small gap on each side to accommodate any misalignment of the cylinder as well as allowing fuel/oil mix to the wrist pin bearing would be ideal.

Offline Cut4fun .

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Re: Solo 680 piston
« Reply #9 on: March 21, 2015, 11:57:28 am »
Anyone got solo 680 piston specs.

There is a guy talking to OP and me saying he used a 272 piston in a 680.

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