canadian oddy wrote:
Randman and Adnoh make some valid comments.
Randman and I frequently cross swords on this fuel thing as we have different opinions, but he also has a valid comment on page two of this thread about a third of the way down.
Adnoh was trying to steer you into building the perfect
Engine that will run on pump gas. Unfortunately some of us don't have the tooling, skills or money.
This all comes down to: "Do you have a boy machine or a girl machine ??"
If you have a girl machine and it's blowing holes -- run Avgas -- dragon slayer.
As for your top end sputtering I would try the stock main jet. I believe it is a 160. If that don't work then it could be an issue with electrical.
I would verify good connection between boot and sparkplug first. Then the following:
viewtopic.php?f=25&t=17418Absolutely - all have been very helpful here and it is appreciated - Huge Thank You To All!
Randman does make a good point about riding style and everything I have read has confirmed his point about the machines all requiring individual jetting regardless of everything else being the same.
And WOW - really can't say enough about Adnoh's input, it was like a novel. While I had to read through it a few times to get my head around it, it taught me a lot about the internal process of a two stroke Engine. Unfortunately, after the cash I have already laid out in top end rebuilds and everything else (but mostly top end rebuilds), I am not in a position to start messing with the porting and timing. Yet.
Spark plug boot is new but checked it anyway and everything looks good. Gonna leave my jetting as is with a 162 for now and just run it. After a few months, if still sputtering up top, I'll take a stab at dropping down a size.
And yes, I apparently do have a girl machine which seems to require an inordinate amount of attention. No problem though, if she is happy with avgas, so am I.
Hopefully, this thread will continue to build the knowledge base here and help someone in the future.