True compression test info please

proflow · Mar 28, 2018

Hi folks

Im looking to purchase a still in bike 06' FE650 engine & want to know the compression.
The owner did it & got 60lbs & is thinking its due to the auto compression release.
How can this be done so I can get a real reading ?

Also if this is a tight engine does 2k US sound fair ? Is not including carb, cdi, exhaust or kick starter jfyi.

Thanks in advance ---Proflow

proflow · Mar 29, 2018

Nobody ?

tourist · Mar 30, 2018

Good question! I don't know the answer, but maybe there's something in the manuals. Do you see the links in my signature? Those are tons of manuals here on the forum and some more on our google drive. (Links in sig are hard to see on mobile.)

FE350 · Apr 2, 2018

Do a leak-down test and see how it holds, Also a compression test will work as the gauge has a lock off and will climb at each kick. it should build pressure over about 5 kicks and give a reading.

Goose916 · Apr 2, 2018

Leak down is the way to go. You really can't get an accurate reading with auto-decomp. I'm all ears for anyone that has a way around it.

proflow · Apr 2, 2018

Thanks for the replys,

So how do you guys feel about $2000 US for a FE 650 running engine ?

Goose916 · Apr 3, 2018

kinda spendy for just a motor.

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True compression test info please

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FE350

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