Well.  Things have changed a bit from my last post in this topic.

I've done some engine upgrades, like swap to 1.6 valves, maximum porting of intake and exhaust channels that was possible to do, sport valve guides, 5 angle seat&valve profile (we, here in Ukraine, call it "special profile"), another stage of carb grinding + finetuning with custom jets. Actually, the intake valves almost the same, just 0.5mm difference in diameter, but exhaust ones are noticably bigger. Finally all works had been done and I couldn't wait to testdrive my Sammi. So I started it... and WOW !!! That's the night and day difference in "sound quality" , now my engine voice is way better than it was before, but real difference appeared when I've ridden it. Now my motor can use all that piece of exhaust engineering properly.
 Some pics:

more pics:

and more...

and finally last pic:
(sorry for so many pictures and for that it is only partially relative to the exhaust systems)

You guys.....so silly.

Reading through posts about trying to squeeze more power from such a powerLESS engine is funny.

Like you are all in denial.....It's like an AA meeting!

"My samurai has so much power....it really does....and I don't have a drinking problem either!"

=P

Pretty sure I get some nice numbers out of the "little' 1.3. Damn nice motor for a apple to apple upgarde in a sammy!! This dyno sheet is of my 9.5 motor, not even the better 10.2 compression motor. You can see that with a little work these things have some potential.

Pretty sure I get some nice numbers out of the "little' 1.3. Damn nice motor for a apple to apple upgarde in a sammy!! This dyno sheet is of my 9.5 motor, not even the better 10.2 compression motor. You can see that with a little work these things have some potential.

Is this the mounted on vehicle dyno run, or just engine on the test bench? What is the exhaust configuration after that pacasetter?