Just pulled the head on an 83 KZ750 H4 and almost every one of the shim buckets was extremely difficult to pull out of their bores and they go back in the same way. If I try one of the loose fittings buckets in another bore there is no problem. Has anyone here ever seen or heard of this problem and why did this happen? I'm ordering new buckets to replace the ones that are too tight but I'd sure like to know what caused this problem.

 

Welcome to KF,

possibly the cams are going out. Worst case scenario. Good luck

 

Yea, I suppose that could be a problem but the cams look great.

 

buckets, pockets out of round? have you mic'd them? what kind of oil do you run?

 

You have me curious now. Since you have everything apart. List up the measurements.

 

lol...ya, I was curious also Ted.

I was thinking blow back from valveseat, causing carbon buildup maybe...Wrong weight oil/too long change interval/etc causing oil breakdown and crystalizing causing a buildup in the bucket/pocket.

If he was going to take the time to mic, prob out of round, then have him do a quick sandpaper job, and remic.

If the cams were wiggling around, would they cause this?

 

or even rust causing the binding if it sat that long. There are alot of unknowns just yet.