Post by JR on Mar 20, 2013 10:09:46 GMT -5
OK it seems that this motor to say the least is a real needle in the haystack and IMO some of the best suggestions by all have come out here so not only do we want this scooter to run right it has become a mission in doing so. When we do figure it out then not only will it be a thread to remember for future problems like this I'm going to personally salute the suggestion that fixes it. 
I've read this very closely and I can relate to what Jim said on a couple of things myself as far as pressurizing the crankcase due to a ring problem, one was on a old time favorite that Jim, Alley and myself remember and that's the old 235 straight six Chevy of the 50's and 60's. Two things come to mind from that old solid lifter engine, (1) a ring journal can break or crack and she'll blow oil even out of the oil cap cover (2) if all the rings line up for any reason with the break in the ring all lined up she'll do the same thing, as the piston rises on the compression stroke it'll blow back to the crankcase yet not smoke.
Ya forgot, that one Alley.
I had to think back myself and I had that happen to me on a old Clinton engine once, remember the look alike Clintons of yester year that copied the B&S ones. My dad had some choice words for that lawn mower that I can't say here! 
Also I'll throw out some food fro thought? Colorado? High elevation? Should we not hold the jets down to a stock size and try to get her extra air say with a unifilter? Yes she has other scooters that are doing fine but this one for whatever reason is being a problem child kind of like the old saying in the family, the black sheep.
Let's put our heads together and if one thing that common sense says it doesn't work scratch it and we go back to the drawing board. It's a conquest now so get your pencils out!
JR
I've read this very closely and I can relate to what Jim said on a couple of things myself as far as pressurizing the crankcase due to a ring problem, one was on a old time favorite that Jim, Alley and myself remember and that's the old 235 straight six Chevy of the 50's and 60's. Two things come to mind from that old solid lifter engine, (1) a ring journal can break or crack and she'll blow oil even out of the oil cap cover (2) if all the rings line up for any reason with the break in the ring all lined up she'll do the same thing, as the piston rises on the compression stroke it'll blow back to the crankcase yet not smoke.
Ya forgot, that one Alley.
I had to think back myself and I had that happen to me on a old Clinton engine once, remember the look alike Clintons of yester year that copied the B&S ones. My dad had some choice words for that lawn mower that I can't say here! Also I'll throw out some food fro thought? Colorado? High elevation? Should we not hold the jets down to a stock size and try to get her extra air say with a unifilter? Yes she has other scooters that are doing fine but this one for whatever reason is being a problem child kind of like the old saying in the family, the black sheep.
Let's put our heads together and if one thing that common sense says it doesn't work scratch it and we go back to the drawing board. It's a conquest now so get your pencils out!
JR
My grandkids and I this past winter made up some new bluebird houses and in the last few days I've got them all mounted along with my new martin house for the early spring birds and let me tell you nests are being made! I park my Traverse outside my carport and in the last few days a beautiful pair of bluebirds are already building a nest in one of the boxes. They take breaks and when they do they both fly over and land on my Traverse's outside mirror and hang down and look at themselves in the mirror! Needless to say they leave the white poo on the mirror too! 
Why did you change the CDI to start with? No spark, no run? Or was this the performance CDI change? If the scooter was running before with the stock OEM CDI how did it run? 
