Terry there have been some recent postings about lifters adjusting up and removing all slack , causing loss of compression Here are excerpts from a long thread .
: ? i FAILED TO GET THE MEMBER NAME ON THIS ONE SORRY FOR THAT .
Join Date: Oct 2006
Location: Green Bay, Wisconsin, USA
Posts: 1,223
If I remember right there is a stop on the adjuster (eccentric) so it can not go overcenter. I still agree that DaveO could be on track that somehow the adjusters are overadjusted. If that is the case and all has returned to normal it might take a while for the "lifter" to bleed back to normal. You might try checking oil pressure and bleeding the lifters as Dave said. Might be a case where the relief stuck just long enough to "pump up" the lifter. Now it needs to get back to normal somehow IF oil pressure is normal.
It is possible that the relief valve got a small piece of debris jambed between the valve and the bore. Oil pressure shot up. This pumped the lifters up so high it opened all the valves that would otherwise be closed and now the oil is trapped in the lifter so the valves can not close. If you bar the engine over slowly, only a little at a time and let it rest it might clear itself with lots of patience. Turn a little then wait for minutes. Turn again and wait.
I think if it were me I would spin the engine and check oil pressure first as you would be wasting time ifoil pressureis the root cause. I think the odds of bending valves is very low. It seems to me the travel of the lifter is only 10 to 20 thousandths if I remember right. Piston to valve clearance is almost always like an 1/8 of an inch.
:motoxdemon
Join Date: Feb 2012
Location: salem, Indiana, USA
Posts: 12
It is now running,what i done was take out lash adjusters,one at a time and turn them over and pump all the oil out of them with a torch tip cleaner,then stuck them in a cup of seafoam and pumped them untill all the air was out and reinstalled them,engine fired right up,and has 205 psi at 4 cylinders and 200 psi at the other 2,just need to check oil pressure,and do a leak down test,thanks to all that left comments,
perhaps this is your problem on one valve and it needs pressure relief .
I cant find them but there are also postings of putting bike on center stand , put in gear and turn the rear tire backwards several times over a day and this somehow will relief the pressure . Sorry I cant find the correct search words for that thread .
: ? i FAILED TO GET THE MEMBER NAME ON THIS ONE SORRY FOR THAT .
Join Date: Oct 2006
Location: Green Bay, Wisconsin, USA
Posts: 1,223
If I remember right there is a stop on the adjuster (eccentric) so it can not go overcenter. I still agree that DaveO could be on track that somehow the adjusters are overadjusted. If that is the case and all has returned to normal it might take a while for the "lifter" to bleed back to normal. You might try checking oil pressure and bleeding the lifters as Dave said. Might be a case where the relief stuck just long enough to "pump up" the lifter. Now it needs to get back to normal somehow IF oil pressure is normal.
It is possible that the relief valve got a small piece of debris jambed between the valve and the bore. Oil pressure shot up. This pumped the lifters up so high it opened all the valves that would otherwise be closed and now the oil is trapped in the lifter so the valves can not close. If you bar the engine over slowly, only a little at a time and let it rest it might clear itself with lots of patience. Turn a little then wait for minutes. Turn again and wait.
I think if it were me I would spin the engine and check oil pressure first as you would be wasting time ifoil pressureis the root cause. I think the odds of bending valves is very low. It seems to me the travel of the lifter is only 10 to 20 thousandths if I remember right. Piston to valve clearance is almost always like an 1/8 of an inch.
:motoxdemon
Join Date: Feb 2012
Location: salem, Indiana, USA
Posts: 12
It is now running,what i done was take out lash adjusters,one at a time and turn them over and pump all the oil out of them with a torch tip cleaner,then stuck them in a cup of seafoam and pumped them untill all the air was out and reinstalled them,engine fired right up,and has 205 psi at 4 cylinders and 200 psi at the other 2,just need to check oil pressure,and do a leak down test,thanks to all that left comments,
perhaps this is your problem on one valve and it needs pressure relief .
I cant find them but there are also postings of putting bike on center stand , put in gear and turn the rear tire backwards several times over a day and this somehow will relief the pressure . Sorry I cant find the correct search words for that thread .
