timing light w/inductive pick up By imnts2 (Read 1,116 times)

[imnts2]

Has anyone found had success using an inductive pick-up timing light on a GY6 engine with AC ignition?

thanks
lefty2

[justbuggin2]

ever thought of using one on the gy6

[sprocket]

There is no timing mark on a GY6, the timing is FIXED... no way to change it unless you get a spark advanced CDI and then it is only adjustable by a few degrees

[imnts2]

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

[rapidjim]

An inductive timing light is attached to the coil wire at the plug and flashes as the coil fires. It does not make a difference if the CDI is AC or DC powered.

Jim

[sprocket]

This are pretty adjustable.. RPM and spark advance...AC CDIs

Attachments:

[tvnacman]

Ok 8hp engine by advancing or retarding the timing , what is your goal ? Did you want to pick up some power on the low end and give up top end , make it hard to start hot . Do you think you will get anymore topend . Did you just want to have to rebuild your engine sooner ?

John

[imnts2]

I have to ask Jim if he is sure. Have you used one Jim? If you are sure, I will break down and buy one. I did buy a tach that had an inductive pick up to cliip over the spark plug wire but it would not work and was returned.

I want to be able to see what is really happening, not just what some salesman says will happen. As far as I am concerned a lot of "performance" stuff is mostly hype" Smittys really sounded great on an old 6 cylinder chvy but failed to show much on the stop watch.

Again thanks a lot to everyone.

cheers
lefty2

[tvnacman]

Lefty on an 8hp engine all the proformance items are hype , aside from the carb and exaust , and gearing/roller weight .

John

[imnts2]

John. My objective is exactly what I said. I am a bit of a scientist. (you know "empirical" "observable"" repeatable" "measurable" and all that stuff).

I want to know. So before I spend $150 for a good instrument (tachometer/timing light) I would like to know it will work on a GY 6 150 with AC CDI. Then I can reasonably accurately plot the ignition behavior at different rpm's and "know" what different CDI's are doing and reduce "judgment " recommendations to reasonably scientific measure able conclusions.

And of course an 8 hp 150CC engine can be made to put out more power. A lot more. And we do have people who without BS can make a 150 put out twice that power and still be reasonably reliable. But few 150 scoots can safely handle much more power. Honda claims 15.5 out of their 153 2VALVE whisper quiet engine. I used to make .09 Cu in engines fly at near record speeds. I never was quite good enough to set national records. Darn near did with Team Racing " 29 class".

But that was not my question. My question was and still it - will a inductive pick up timing light work on a 150 GY 6 with AC CDI. Do you know? if not I really wish you would not try to hijack my thread. Thank you.

[rapidjim]

Apr 1, 2012 15:01:38 GMT -6 imnts2 said:

I have to ask Jim if he is sure. Have you used one Jim? If you are sure, I will break down and buy one. I did buy a tach that had an inductive pick up to cliip over the spark plug wire but it would not work and was returned.

I want to be able to see what is really happening, not just what some salesman says will happen. As far as I am concerned a lot of "performance" stuff is mostly hype" Smittys really sounded great on an old 6 cylinder chvy but failed to show much on the stop watch.

Again thanks a lot to everyone.

cheers
lefty2

It should work as far as a timing light is concerned. I have never had the need to use one on a scooter before but, I will go out today and check it.

As far as a tach is concerned, unlike a timing light, most tachs need to know how many cylinders are on the machine. Now I have a tach mode on my multimeter, if I can find the pickup I will try it too. Never used that function.

Jim

[imnts2]

Jim. Thank you. Thank you, thank you.

Lloyd

[rapidjim]

Test results.

I have an OTC DC powered inductive timing light. The timing light is hooked up to the battery for power and the inductive lead to the plug wire. The timing light does work.

Also I have a fluke multimeter with a Tach setting. I did find my inductive lead for it and tryed it. It also works. Read 1600 RPM on a GY6 150.

So my assumption of them working was correct.

Jim/Owner
Rapid Repair

[imnts2]

Jim Thanks a lot. I bought a tachometer- multimeter that had an inductive pick up and it just would not work. I was really disapointd partly because it had a very professional look and quality, My guess despite being specified as an inductive pick up it was a capacitance one. I will look for an OTC just to be safe.
Thank you again.
Lloyd (lefty2)