Thank you. Slow and steady. Ready to see if I have gains or losses. Lol. Either is possible on this saw.
On the exhaust I simply squared up the corners just a little careful not to lower it any and widened just a little and I mean very little. And the...
[ATTACH] A little progress tonight. I got the upper trans done. I squared them up a bit more from last night and finished them with a diamond burr.
I probably won't by the time I'm done but I also have to watch my gasket. By the time I would take all the top slit out my gasket maybe to thin....
On this saw I aimed for the 7900 numbers with a slightly higher exhaust to move my rpm range up.
[ATTACH] [ATTACH] One final pic for the night. I roughed in one upper trans before calling it a night.
[ATTACH] [ATTACH] Here I've marked out my upper and my lower trans. I will just case match and blend my lowers. I will not take any out of the...
[ATTACH] [ATTACH] [ATTACH] Now the exhaust outlet takes a lot of blending. But i was very careful not to touch the base next to the piston being I...
[ATTACH] [ATTACH] [ATTACH] On the exhaust I pushed a ring up in the cylinder and market it at 102° and then marked my intial widening. I marked...
Well here's ya some numbers to play with. Lol. The second saw I will try a 25°blowdown and if that dosnt work I will simply raise the exhaust to...
My plans for this first saw is ex 102, trans a flat 129, intake squared and widened a little at what ever the base cut ends me up at. Then I will...
[ATTACH] [ATTACH] I started by taking .032" off the base and .038" off the squish band. The saw is getting close to free porting at these numbers....
Here's the intial numbers. Ex 106, trans 130-132 slant, intake 76. Squish .025" with base gasket .015" without. Comp 165. I have not did a...
A few pics of tear down. You can see the small crankcase volume these saws have.[ATTACH] [ATTACH]
[ATTACH] [ATTACH] [ATTACH] [ATTACH] Ok I started off by muffler modding one saw. And i did a thread one this just a few days ago
I've promised several people I would do a build thread on this saw. So here we go. Please be patient as I am slow with these. This will be my...
Nothing wrong with a 391. But i would highly recommend a pro saw. Like a 362cm. Or if you can find a used 441cm it will blow your mind...
Thought I would throw a few sneak peaks in. Lol. Factory numbers. 165 comp, .025 squish with gasket. .015 without. Exhaust 106, 130-132 slant...
That will be next. The hybrid will most likely stay in my collection. But i will try to run it a 7910 and my 75cc 372xpw again each other when...
Thank you! I'm gearing up for the 7910 build thread now. It will be my first go at this saw and you all will see how I work up to a recipe.
