Great quality work and I'm sure you'll get a leak free engine with your smooth machined joint surfaces and great care taken - but I'm not a fan of copper rocker box gaskets. I could not get a seal using copper in my 250 Trail Blazer rocker box and went back to paper which I also used on my (non leaky) T90. I think it's due to the lower clamping force (compared to the head joint). I helicoiled the four 1/4 BSF screw threads in the head to get more clamping force especially as they seem to work loose over time.
It was great meeting you at Stafford, keep up the good work. It will be nice to put our T90's together to compare notes.
It was an honour!
Would you happen to be going to the 75th TOMCC weekend at Shelsley Walsh?
If your stand is there, maybe I could park my bike on it?
Great quality work and I'm sure you'll get a leak free engine with your smooth machined joint surfaces and great care taken - but I'm not a fan of copper rocker box gaskets. I could not get a seal using copper in my 250 Trail Blazer rocker box and went back to paper which I also used on my (non leaky) T90. I think it's due to the lower clamping force (compared to the head joint). I helicoiled the four 1/4 BSF screw threads in the head to get more clamping force especially as they seem to work loose over time.
It's the first time I've used the copper ones. I'm wondering if sucess is based mainly on how smooth the castings are?