I may have time late in the year to take on new projects. It depends on upon getting done what I have on my plate know. I keep you advised if time allows. It will take time to do the work and I would have to have parts for about a year. The whole complete Engine, heads and exhausts would be required and all the varible parts. It does interest me to have an opertunity to look over professional Engine builders work and learn. I have been logging data from your Engine in a seperate file. I have a ton of questions that would drive the builder nuts and most likly get a wrench upside my head. What interests me about you pic and piston location is the squish. It goes against would I have done and been working on. An air cooled cylinder, I could see an application for such clearence however on the water cooled jug I find it surprising and make me ask my self why and time to refelct. Many has mentioned squish and whats the #. This may be why they ask as well other than just making sure it's not to close,in this case it may be, why so much. I will try to get my hands on a YZ piston and see what the piston crown angle, pin to crown and pin offset is. Wonder which way Yahama rolls the piston, intake or exhaust side. My first thought on the pic and the comp # is over rev which the short stroke of the ody likes and has an advantge over the pilot. Wonder if they do this to help keep it in check. Then it makes me question the timimg and heat range and LT on the pipe. See more question than ansawers. It leads me to think that it made to rev up past 8500 with a peak around 8000 and get the egts right on top end and a slughish bottom sounding like it's missing and slight stumble thu mid. I gotta know is it kinda hard to start at low cranking speed. I know its a lot of thought just from a pic and low comp number.That is just how my head works, again more questions than ansawers. When you did a crank comp check did you do a wet test just to make sure it's not a ring problem. Again just aback yard hacker no pro. Thank you for sharing this project with the board

I may have time late in the year to take on new projects. It depends on upon getting done what I have on my plate know. I keep you advised if time allows. It will take time to do the work and I would have to have parts for about a year. The whole complete Engine, heads and exhausts would be required and all the varible parts. It does interest me to have an opertunity to look over professional Engine builders work and learn. I have been logging data from your Engine in a seperate file. I have a ton of questions that would drive the builder nuts and most likly get a wrench upside my head. What interests me about you pic and piston location is the squish. It goes against would I have done and been working on. An air cooled cylinder, I could see an application for such clearence however on the water cooled jug I find it surprising and make me ask my self why and time to refelct. Many has mentioned squish and whats the #. This may be why they ask as well other than just making sure it's not to close,in this case it may be, why so much. I will try to get my hands on a YZ piston and see what the piston crown angle, pin to crown and pin offset is. Wonder which way Yahama rolls the piston, intake or exhaust side. My first thought on the pic and the comp # is over rev which the short stroke of the ody likes and has an advantge over the pilot. Wonder if they do this to help keep it in check. Then it makes me question the timimg and heat range and LT on the pipe. See more question than ansawers. It leads me to think that it made to rev up past 8500 with a peak around 8000 and get the egts right on top end and a slughish bottom sounding like it's missing and slight stumble thu mid. I gotta know is it kinda hard to start at low cranking speed. I know its a lot of thought just from a pic and low comp number.That is just how my head works, again more questions than ansawers. When you did a crank comp check did you do a wet test just to make sure it's not a ring problem. Again just aback yard hacker no pro. Thank you for sharing this project with the board

CDI (Capacitor Discharge Ignition) wiring diagram and pic
the builder is out of ca,and very quiet about it..no details on the internals

ok, im confused now!
IDK, I am going to run a stock CDI (Capacitor Discharge Ignition) and see how it goes with the 360
I was told{don't know if true} that the pvc CDI (Capacitor Discharge Ignition) was used because of the port timing change on the 400's
I know the flywheel is marked for the timing change and the spacer plate has to be used
I have one more guy Im gonna try and get ahold of, he knows all,but very busy guy from what im told

Gotta sit down,room is spinning!

part 2. I do not advise anybody do this unless there DARN sure they have a handle on what there doing. This are just my notes for refrence and discussion. Had to throw out the disclaimer. Please Do Use Caution though.

part 2. I do not advise anybody do this unless there DARN sure they have a handle on what there doing. This are just my notes for refrence and discussion. Had to throw out the disclaimer. Please Do Use Caution though.

I was looking at the paper drawing of the 350 ign. It looks like they changed the amount of available advance. It looks like they changed the duration on the flywheel mag which reduces total available advance and the initial timing depending on which end they ground in relation to TDC (Top Dead Center) hard to tell in the pic. Kuda have you looked at you flywheel to see if it was ground. Measure the length of the timing tab with a string then mic the length of the string. The some one can measure the length of a stock flywheel and we can see how much and what they changed. We should be able to take the circumference of the fly wheel and establish an amount of degrees.

Turns out,1 head is bad,exhaust is coming out the water fitting...Crack somewhere,60psi
this was the lower comp head

2nd head, about 142psi when I noticed a leak at base gasket..soooo

motor (( Internal Combustion Engine ? )) is back on the bench..going through it today
leakdown test

question??

coppercoat spray permatex vs yamabond for base gasket??

thoughts?