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That used to be a very common tool to assist the tune up of carburetor equipped automobile engines. I used it many times. I also used it to synchronize carburetor linkages until I go flow gauges to measure flow.

I have not done a carb that way since Carburetors largely disappeared from my cars in the early 80's. but I will try to give you some idea Understand, tuning a carburetor or an engine is a bit of an art. The idea is that the best ignition timing at idle will be just a little retarded of highest vacuum (lowest intake manifold pressure and and the best idle mixture will also be a little richer than the highest vacuum. Both of those little's are really very little. But in addition, as you get familiar with the engines you are tuning and your instruments, you will get a sense of the condition of the engine (ring sealing, valves leaking or not adjusted properly , leaking vacuum lines, etc. You can also get a sense of the condition of each of the cylinders by shorting out the plugs one at a time.

Now I suspect a little search on the net will yield a more detailed instruction sheet and a better explanation. If you don't have luck. let us know and I will try some more.

Good idea I think. Frankly, I'll bet the artist would be flattered to let you ply him with food (and/or drink) and tell you all about it.

Thanks for the question

lefty2

Craig's list is a poor way to to find out what things sell for. I rarely pay what is asked. It costs nothing to list on Craig's list. Most of the Lister's are dreaming. They "hope". It really does not matter what the listing is. I always so my research elsewhere. Sure , I sometimes do not get what I want, but almost always, I find a better item in a short time. So the bottom line. You are selling used stuff. It does not matter what you have in it. What matters is what else it out there and what does it sell for. You have a good running scoot the looks good. Get good digital pictures. Emphasize the good stuff. Point out the obvious faults and decide your price.
Be nice and smile a lot and friendly.

Offer to let the guy start it himself. Have it blocked so it can't be driven off. NO, they cannot ride it till it is bought. I never let anyone ride a scoot bigger than a 50cc. NO tags, no insurance. If they pay for it, is theirs to do as they will. Once paid for and I give them the title, they can ride off. If they do not like it, bring it back just as they bought it and I give them their money back. Break it/ Damage it and it is theirs.

Takes a little patience and a lot of smiles and nods. Not all of us are salesmen. I am not particularly good at it myself so I have had to work a bit. But I am happy to be honest.

Have not pulled one but did do an extensive PDI recently on my 06 as preventative maintenance. During it I removed all of the plastic aft of front end (some of it I removed also to get at the cooling system)

Why do you need to pull the engine? I decided when I had it undressed I could probably do a full top end including piston and cylinder OH without removing the engine/

My $70 Harbor Freight motorcycle jack did a nice job of helping hold the scoot to work on it. but I am going to splurge most of $200 for their high lift jack so I have it to stand up ( or sitting on a stool) height when I need to work on it. (I need it anyway to lift my tool boxes 25" to get them in an elevator when and if I need to prepare for hurricane or flooding.)

Cheers
lefty2

Yes. Got by from a reliable store.

Let us know how it works out

Thanks
lefty2

Common guys. Apreciate you reflexes but I I know what you told me. A person only needs to be clever enough to make a simple little backet to adjust the timing. (not very clever - just not stone dumb)
But that is not the question I asked.

Besides it is pretty easy to find TDC and mark it. Then with a good timeing light/tach one could map the addvance curve of various CDI's includeing the so called "performance" ones. (if it will work wirth an a AC CDI ignition.

So the question is has anyone had any success using a timing light on a GY6 with an AC cdi. I suspet the AC cdi is not very compatible with inductive pickups.

lefty2