Post by 90GTVert on Jul 17, 2012 6:24:10 GMT -5
The following information was provided by forum member 2strokd.
After a long ride and a bunch of vari tuning, weights and shims i just wasnt getting the results ide like. It seemed to be loosing power slowly but surly over time (about a year). I was hoping a fresh CVT tune would wake it up. I know that sounds silly but it still help RPM even though the power seemed to be getting worse.
After the new stuff and all ways of tune i came to the conclusion that it may be time for a top-end inspection. I was thinking yesterday on my way back from a friends place in a small town about 15miles from here. "man, it seems quieter than the last time i made this trip?" The exhaust note seemed different as well. Not a whole lot, just a tad quieter. After talking to my son, that ofter rides with me following he seemed to agree that it didnt sound as loud, or "2T" as it should.
I went out this AM and pulled the top-end for the first time
. Yaaa! I broke my record! I rode this scoot for 3 years without touching the top-end.
This is what i saw as expected from a previous Cobra with the same issue.
Now thats not gonna provide peak performance is it? 
The first thing to want to blame is the oil. Well, i got this scooter used and who knows the oil that was burned in it before? Ive decided the run it awhile after clean-up. When i get a new piston/rings i will see how much buildup it has when i install the piston.
Everything else looked great!
Look at the piles
Not as nice as it could be, but much better!
Ahhhh! To have the power and 50+MPH back when needed is soooo nice!
After a long ride and a bunch of vari tuning, weights and shims i just wasnt getting the results ide like. It seemed to be loosing power slowly but surly over time (about a year). I was hoping a fresh CVT tune would wake it up. I know that sounds silly but it still help RPM even though the power seemed to be getting worse.
After the new stuff and all ways of tune i came to the conclusion that it may be time for a top-end inspection. I was thinking yesterday on my way back from a friends place in a small town about 15miles from here. "man, it seems quieter than the last time i made this trip?" The exhaust note seemed different as well. Not a whole lot, just a tad quieter. After talking to my son, that ofter rides with me following he seemed to agree that it didnt sound as loud, or "2T" as it should.
I went out this AM and pulled the top-end for the first time
. Yaaa! I broke my record! I rode this scoot for 3 years without touching the top-end. This is what i saw as expected from a previous Cobra with the same issue.
Now thats not gonna provide peak performance is it? The first thing to want to blame is the oil. Well, i got this scooter used and who knows the oil that was burned in it before? Ive decided the run it awhile after clean-up. When i get a new piston/rings i will see how much buildup it has when i install the piston.
Everything else looked great!
Look at the piles
Not as nice as it could be, but much better!
Ahhhh! To have the power and 50+MPH back when needed is soooo nice!