Thanks for the replies guys!
Bruce, my inbox is full? I went and checked and it is empty and I am using 0%..maybe it is/was a program glitch that day.
Here is where I am at right now, I had a problem with when I set my "x" dimension at +.004 (spec is .000 to +.004) I heard a slight knock. using a thicker gasket would have put me out of spec, i was either out of spec or plus.004 when setting up the top end. I removed the head to look at some burn patterns and stuff and noticed that the intake side of the head was forming a burr and a small notch. the intake side of the piston was hitting it.
On the ktm the head pilots onto the cylinder via a counter bore to center it, the fit was good, so obviously when the head was machined the chamber was slightly off. looking at the size of the notch forming I decided it was about.005 off
While I was at it I noticed that the squish was around 2.2 mm. pretty large. I know that too much squish will reqire race gas due to poor chamber design,
ktm 300 owners are always chasing low throttle pings and decel pings, and having to richen the pilot jet beyond optimum usually to get it to stop.
The result is less than stellar off idle to 1/4 response and power and people who never reallys seem to be able to completely get rid of it on pump gas even though the compression seems pretty conservative to me.
Here is where I am now
opened the head chamber diameter .010
reduced squish to .056 from .086, I was aiming for .060, but the shop didn't have an insert really suited for alum at the rpm I was using for surface finish reasons, I forgot to use oil on my finish cut .001 and the alum stacked on the tool, wedged between the tool and my work and galled it, so I had to regrind the tool, remember to use lots of oil and had to take off .004 to clean it up from the galling, as well as taper from the alum stacking, stupid mistake.
cc is now 25, I didn't have my setup to meaure it beofre cutting as it was loaned out, i wish I had it the now just for notes at least.
With my lack of knowledge on thsi subject I have come up with these results using bimotion, although like I said I am no expert on answering the questions it ask and the instruction pdf is kinda sketchy. Using mm measurements of the exhaust port I have come up with these results.
SQUISH BAND 44%
COMPRESSION TRAPED 7.9
SWEPT 12.9
MAX SQUISH VELOCITY 23.7
@10.8 BEFORE TDC
TURBULENCE RATIO -.012
to be honest I don't even know what some of this means and what is "good", the instructions don't make mention either, I am trying to research this and learn what it all means now.
Seat of the pants the bike is stronger, lost no top end, and very very crisp with regards to throttle response, it revs much much quicker.
The air screw which seemed to be so unresponsive beofre is now very very sensative to as little as 1/4 turn, where as before it was about 3/4 to realy notice it had changed, not total out turns, just a slight turn from where you are now is very sensative, I wonder if this is due to not having a buch of air,fuel laying around not getting burned?
what else should add or research to make sure I am not making mistakes?
as always I welcome any opinion on the subject.
Thanks,
Clay