Jfl0528
Cool guy
Agreed
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Unfortunate results
- Thread starter Jfl0528
- Start date
Jfl0528
Cool guy
thank you I will rebuild
Are you capable of starting a project and seeing it to completion? You know yourself better than we do. Do you enjoy this kind of thing? It's not that expensive as hobbies go. How much it's going to cost depends upon you. That thing could end up $2500 or less, or four times that. It's a matter of where you want to take it. Enjoy the journey. Share it with your friends at XS650.com
True... but these things are pretty simple really I think. No emissions crap, no fancy computer controlled fuel injection. Carbs and a charging system really. Once you have a handle on those two things most everything else is a cake walk.
Of course, I say that now. Ask me again when it's time for me to get all the electricals done on mine and let me tell you how much I hate life...
Confirm you have correct valve clearance. .003 and .006". If one is too big it might just be carbon on a seat.
Just had one in the shop, a po had set one side too tight. Easy fix!
Just had one in the shop, a po had set one side too tight. Easy fix!
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Jfl0528
Cool guy
Is that a dent in the top of the left exhaust valve?
Any marks on the pistons showing collision?
Can't really tell with my eyes. lol
Timing's easy, no worries.
Any marks on the pistons showing collision?
Can't really tell with my eyes. lol
Timing's easy, no worries.
Looking at the pics, I agree with @JOHNDADDY ... looks like that left exhaust valve hit something. Everything else though looks pretty normal for a well used motor. After you get the valves out, we'd like to see closeups of the valve face and it's seat. Hopefully they can be reworked.
Jfl0528
Cool guy
No marks that I can see, I’m getting a quote from a machine shop today to see what he’ll charge for a resurface, on one side I poured water in the combustion chamber with the spark plug in and it leaked everything out immediately, hence the zero compression, the other side leaked while giving it compressed air. Both sides need work
Where did it leak from?
Some carbon there but over all OK
I wold have oil on top of the pistons lubricating downwards
Maybe a lapping of valves can be enough
I wold have oil on top of the pistons lubricating downwards
Maybe a lapping of valves can be enough
Jfl0528
Cool guy
Here’s a better pic of the valves. I marked the bad side with chalk, I don’t see any signs of damage
Jfl0528
Cool guy
Unfortunately no, wipers weren’t wiping. Rings are frozen to the pistons.
Jfl0528
Cool guy
Looks like a tap on that exhaust valve
Jfl0528
Cool guy
Wow good eye, I have it right in front of me and I didn’t even see that
Looks like a light hit but enough to lose compression,
piston's probably ok.
piston's probably ok.
Thinking out loud This can be a cheap problem to solve
Rather Low mileage .the valve stem, play is tight unless damages
The valve taking a hit .. replacement
With some luck the pistons is OK
And bore also OK ..New rings
I give it a chance that lapping compound can make it tight again with some patience and work
Maybe new valve springs I would replace cam bearings ..because i have seen mine wear out
Inspection will tell
Rather Low mileage .the valve stem, play is tight unless damages
The valve taking a hit .. replacement
With some luck the pistons is OK
And bore also OK ..New rings
I give it a chance that lapping compound can make it tight again with some patience and work
Maybe new valve springs I would replace cam bearings ..because i have seen mine wear out
Inspection will tell
