g1 timing ?'s

steveu88

iv'e been playing around with the timing on my 1980 g1 but no matter how i adjust the coil base, it does'nt seem to make any difference. i thought by advancing the timing too much would adversely affect reverse. just for the heck of it, i advanced and retarded it as far as i would go both ways and it did'nt seem to affect the performance at all either way. what's up? thanks.

BGW

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technoid

I would first have to ask you after you moved the coil if you noticed the idle rpm change? Not by ear but by a tachometer. Also since I am not familiar with your year or engine type, does it have electronic ignition? (I am thinking it does). The electronic module would sense the magnetic flux change to fire the spark. But it also watches the rpm by the speed of the changes. It then advances or retards the time by rpm change. So I am guessing its compensating for your coil movement to maintain a steady analog timming graph. Thats way you don't notice any difference in power. Sound good?

sho305

Been a long time, but when I advanced the timing on my G1 I had to file the holes out or something to get it to move far enough. You turn it opposite the rotation, I advanced it for forward. After that it had more power/speed, and in reverse it was kind of slow and doggy, but it would still back up ok. It acted like the exhaust was plugged in reverse or something like that. Most of those engines they advance 6-10 degrees with their keys and stuff, but I don't know how far that comes out to on that plate. I don't remember how I came to advance it far as I did, or I just guessed. Mostly the advance lets it rev more on the top end, it does not do that much for power but does some. You may not notice that much unless you are very familiar with the cart. It is hard to tell because the clutch system smooths the power out. I had another cart I raced all the time to tell if it changed anything, over a set distance of 50yards or something.

FIXEROFCARTS

With the ones I played with, it didn't matter where you put the timing, it didnt make a difference.

sho305

You need more timing above around 2500rpm, and more under less load. That is why it usually helps it wind out more. It is not going to make a big difference, remember with a car that has 300hp if you increase it 10% that is 30hp, with 9hp that is 0.9hp. Timing is not going to make any .9hp difference I'm guessing.

slonomo

Ok I'm reviving an old thread because I just can't find anything about timing for G1's.

So here is my issue: I found out while plowing snow yesterday that my cart runs way smoother in reverse than in forward. Also I noticed that while driving through the yard in the white stuff, it will throw rooster tails in reverse, but not in forward! It has way more rpm in reverse, is this the timing?

Anyone have any pics or any procedures? I have the service manual but it says to use timing lights and all that jazz....but we know that us hot rodders go by ear and seat of the pants....right?

sho305

First make sure its not the clutch, as the secondary runs both ways. If the ramps are not working right it will not shift right and at the wrong rpm you can lose a lot of power.

As I recall I had to work on the plate to get any advance, there was not room to turn it much. When I got done it went a little faster in forward and was a little more sluggish in reverse, but not a huge difference just enough to notice. Then again this cart had a decked head and other mods but looked stock.

slonomo

Secondary clutch is new, Plowman's kit.

It definitely idles better in reverse. I shimmed out my primary clutch so it wouldn't engage as soon as the starter kicks on (worn out spring). So now I can sit and idle it if I'm gentle on the accelerator.

If I'm in forward trying to idle it, it runs ok and even cuts out when you give it gas when cold. One second later in reverse, it will sit and idle smooth and take off like crazy when you give it gas.

yamarancher

might check the screws that hold the coils on the timing plate. i had one back out on me and mine ran really really weird F & R until i found it. timing won't change much with stock plate. secondary ramp shoes good ? might check wiring for bad conections, hope this helps.

sho305

Yeah you have a problem you need to find there it should have hardly any difference. There is not much room to move the timing plate so even after I hogged the holes out and whatever I did (it was a long time ago) it did not move it that much, just enough to tell a difference. Even then I bet the power was similar just more snappy and would rev harder in forward. I wanted the rpm mostly for speed, I know that cart did over 30mph with stock tires it would really wind up.

A 2 stroke does not care much about what way it rotates, I don't know if even a piston issue would make any difference....so odds are its a wiring or other ignition issue. Long as you are sure its not the clutch bogging it out in forward compared to reverse.