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Old 02-15-2012, 09:35 AM
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biknut biknut is offline
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Join Date: Sep 2010
Location: Dallas
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Default Re: Getting all 3 Horse Power out of your GT-5 Sky? (tear down)

Originally Posted by biknut View Post
My adjustable rotor did come this afternoon. I just got back from my first test ride. it came with no instructions, but luckily I already read what Jim said about how to use it. I don't have a degree wheel so I used the eyeball method. He recommended advancing the timing about half the width of the key. That's what I tried to do, but it's not easy, because you can't really see the keyway when the bolt is in place. I tried to file a mark on the end of the shaft, and made a mark on the rotor with a sharpie. All I can really say is it's more advanced than stock.

It didn't make any earth shattering difference in power, but as advertised it did seem to have an effect on the 4 stroking problem I've been having, because after the motor warmed up it was almost non existant. Before it would start 4 stroking badly after about 30 mph. I just got it up to 36-37 a few times with only the slightest hint around 34 mph or so. I didn't notice any piston ping either, so tomorrow I'll probably advance it a little more just to see what happens. Knowing me I'm sure I'll play with it till I know all it's secrets.
I feel kind of stupid. After reviewing what I did last night, I realize I moved the rotor the wrong way. I actually retarded the timing instead advancing it doh!

I guess it ran with less 4 stroking because it's getting more broken in or something. It did seem to lack much of a torquey feel.
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