New/used engine swap....flush without total rebuild?

[dirty_drew]

I just picked up a another 650 motor for my Cafe project...I blew up the camshaft in my previous engine about a week ago and decided to grab another complete engine. Engine has good compression, pan and crankcase/inside looks clean but its a little dusty on the inside. What do you guys do besides just running it and changing the oil out a few hundred miles? Anything besides just an oil flush? I really dont want to go through and take the heads and jugs off to tear this sucker down as it already turns over easily and with good compression/nothing visibly worn.

Thanks

 

[Potbellied Yeti]

I'm no expert, however I recently acquired two 750's, compression was great and turned over like a champ, when I did pull the jugs #3 piston had a frozen ring or at least really stuck, just saying.

 

[Hoosier Daddy]

its a little dusty on the inside.

Inside where? Good to know what has been exposed to the elements... I have been known to get a couple gallons of kerosene and fill the crankcase , swoosh it around and drain it a few times.

 

[cbcafejunkie]

Thinking about same thing in my 350 and 360 interested to see what direction and results this gets

 

[Bert Jan]

dont fix it when it's not broken.

oil consumption, color of exhaust smoke and compression are perfect indicators.

 

[trek97]

After sitting in a corn crib for 20 years. I just changed the oil in mine. rode her a year and a half, before needing any engine work. And even then it was cause sparkplug threads blew out. nothing really mechanical.
I vote ride her...she might be just fine. fix her when she needs fixed.

 

[Rich Ard]

Were it me, I'd put fresh oil in, put ten miles on it, then change the oil/filter and see what's what. If it looks good do it again in a few hundred miles.

 

[SONICJK]

Were it me, I'd put fresh oil in, put ten miles on it, then change the oil/filter and see what's what. If it looks good do it again in a few hundred miles.

+10
These things are pretty bullet proof it should be just fine as long as there's no rats nest in there 8)

 

[dirty_drew]

+10
These things are pretty bullet proof it should be just fine as long as there's no rats nest in there 8)

Thats what the plan is. Got oil in it today and started her up and got it riding. I figure ill change the oil again before I go on my 4th of July lake trip just to be sure. I've just been stressing too hard over it lately since I snapped the cam in the other motor I had last week.