I might have kept my foot in it a little too long.

**BigKiddd** · 07-31-2021, 09:19 AM

I had just put the heads on recently and did not recheck tourque after running it. I ordered head stud kit for my 260 that I am assembling now.

**BigKiddd** · 07-31-2021, 09:21 AM

Loose head bolts at top cylinder. Just put heads on recently. I did not recheck after run time. Lesson learned.

**roadkill636** · 07-31-2021, 09:00 PM

Originally Posted by Stoker boy

Correct! You can’t deck the block too many times. Watch that squish. Sometimes you have to recess the heads.

When is "too little squish"? On a cold mota?

**Stoker boy** · 07-31-2021, 09:27 PM

Originally Posted by roadkill636

When is "too little squish"? On a cold mota?

I hear 35th to 40th is the accepted normal. I’m running tighter than that and have no kissing. I’ve run over 10,000 RPM a couple of times. I checked the squish with standard heads. If the squish is too tight you can take a standard head and cut a slight recess so there is no kissing. The head on the left is a standard 21cc O ring head. Notice the recess. The one on the right is a standard cut head which I will cut a slight recess, I’m pushing my luck running it so tight.