Originally posted by jwf_frani
from what ive seen with 2 stroke engines. you will always
loose some fuel as unburned especially when running more
exhaust timing because there is a period of time where the
exhaust port is open at the same time of induction. Thats
the same reason why recreational vehicles like jet ski, atv, are
being banned from some places just because it emits alot of
unburned gases. thats with controlled ignition.
From what ive seen alot of modders don't just add timing they
also work on the case. sleeve to redirect flow to the squish band
performance goes up and does eat up more fuel than a stock
motor But from what ive seen it will always eat up more fuel
when raising up the exhaust port. I wouldn't say that the engines
are inefficient because the extra consumption is going to additional power. As long as my motors have power and makes
5 min. its all good. 
I just sugest you ask Jose ( don't know his name) i think you know about whom I am talking about, he run my MR12. Ask him speed and run time-that engne has 168 exhaust timing ( it is 14 more degrees then stock). As I sad before, it is depend what was done on engine, where do you have tuned resonance ( only in tuned pipe or somewhere else). It is much more complecated then it looks. Just for instance, do we realy need rump in cranckshaft ( under induction port) or may be it is one more interuption?
BTW, when you have chance, can you please help me set up 710 for Revelation, I just built it and have no clue how to start setting.
