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Unread 07-04-2013, 04:49 PM   #11
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Default Re: 83 G1 Predator 346 Build

Well there's no starter, just a pull start but I will wire a kill switch on the dash. Eventually I would like to have electric start or a charging system for lights at the least.
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Unread 07-04-2013, 04:57 PM   #12
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Default Re: 83 G1 Predator 346 Build

It rained all day but we got the motor mounted.

Added another channel


Welded the mount - Thanks Dad!






The motor is in!




Tomorrow I might mess around with the exhaust, intake and fuel tank.
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Unread 07-09-2013, 08:08 AM   #13
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Default Re: 83 G1 Predator 346 Build

Took her on the maiden voyage. All in all, she did well. I had used a push/pull choke cable for the throttle since that was all i could find and the stock cable was sticking. It worked ok for a while then began catching. I'm going to the bicycle shop today and getting a brake cable for $2. I think it will work fine since it has a lug on one end to fit in the hole in the gas pedal connection.

The other problem I'm having is that it wants to move at an idle. With the brake in all the way it stops the cart but runs really rough. Brake out it will run smooth and creep slow. I spaced the pulleys at 13 1/4" from center-center with a 45" belt and there's a good amount of play in the belt. I took the motor off and drilled the holes about 1/8-1/4" closer to the rear but it didn't help. I'm gonna try to adjust the idle speed and see if that helps. I understand its the black plastic Phillips head screw.

I started with a return line to the fuel tank but then switched the stock air box for a john deere air filter from home depot and took off the return line cause the engine kept dying. I feel like the air/fuel mix is good now.

The only other issue I'm having is at a constant rpm, high or low, it surges and kind of rocks the cart back and forth. If i change rpms it runs steady again. I think it's something with the governor but not really sure.

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Unread 07-09-2013, 10:07 AM   #14
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Default Re: 83 G1 Predator 346 Build

You need to get it to idle down as much as possible ..without having the engine stall every time you get off the gas. That would get old pretty fast with a pull start. Is there a transaxle in your cart or was it a 2 stroke before?

Depending on whether it's possible with your particular clutch, you can also look at modifying it so it engages at a higher RPM. What type of clutch is it? Did it come with the cart?
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Unread 07-09-2013, 05:17 PM   #15
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Default Re: 83 G1 Predator 346 Build

It originally had a 2 stroke and has the original clutch which I don't believe needs modified. it doesnt engage at idle & I like that it gets up to speed quickly. I did adjust the idle screw. I watched it idle (with the brake on) for about a minute after driving it and the friction from the spindle on the drive pulley started melting the inside if the belt. So I'll need to take the engine off again and extend the slots that it sits in. Also, I want to get a better suited carb. Whats a good one for this? I was looking at mikuni's. There's a round slide and flat slide. Is one better than the other for this application? What size would be best, 32mm?
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Unread 07-09-2013, 09:45 PM   #16
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Default Re: 83 G1 Predator 346 Build

Usually at rest you can push the belt down around 2" in the middle. It should not be that far from the shaft of the primary or you lose lower gearing. It should not rub though, either the belt is wide or the clutch has an issue. It should be maybe less than 1" from shaft to inside of belt, I never measured it I guess. Note a new belt will creep because they are sticky.

390/420 clones use a 24mm carb stock. For that seems like a 28 would be plenty stock. They use 30-32mm on built engines, but a 30 should work on it. Not sure what advantage you would have from either carb on this, its just not high performance. I plan to put a scooter cv carb on mine, a pumper I hope. You can get the copy carbs on ebay for $30 or so.
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Unread 07-10-2013, 06:55 AM   #17
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Default Re: 83 G1 Predator 346 Build

Ok I'm a little confused. It wants to move when idling, but it doesn't engage at idle?

No science in my pulley setup at all. I just located the engine/drive pulley so there was enough slack in the belt to let it slip a bit. It works great (even a blind squirrel finds a nut once in a while). There's enough slack to allow me to shift the EZGO transaxle while it's running. Most of the time anyway. The shifter mechanism is a goofy dual cable design and occasionally it doesn't want to go into neutral or switch directions. Not a big deal though.
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Unread 07-10-2013, 07:28 PM   #18
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Default Re: 83 G1 Predator 346 Build

Engage is when the sheaves close on the belt and make the vehicle move with force. Usually engagement rpm is full throttle rpm it does this at, such as if you held the brakes on and floored it (for a few seconds and read a tachometer). It may engage lower rpm at part throttle. Anyway, the belt should not burn at all before this point, when it is loose, or its the wrong size belt or incorrect setup. The belt should run straight between the pulleys. It may drag a little, should not be enough to move the cart though it may creep on hard surfaces.
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Unread 07-12-2013, 06:42 AM   #19
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Default Re: 83 G1 Predator 346 Build

It's probably the new belt, just needs to wear a bit. You could also stretch the primary spring out a little, and give it about 1/4" more distance between the pulleys and it might solve the surging problem. Also, check the shaft between the sheaves on the primary. Does it spin freely when there's no belt on it? It should. If not, remove the clutch, take that shaft collar off and lube the bearing up really good to loosen it. Mine was not spinning and I did this and it helped with the surging issue at idle.
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Unread 07-13-2013, 11:05 PM   #20
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Default Re: 83 G1 Predator 346 Build

A friend of mine really liked the cart and tried to buy it off me. I told him I didn't want to sell it yet cause I wasn't done working on it. I did get it to idle down more so it doesn't pull as much. Probably when the belt wears down and stretches out a bit it will be ok. I think another reason the belt was sticking was the exhaust flex pipe ran over the clutch and was heating it up. I moved it out of the way. Anyway, I ended up trading it to him for a brand new, never fired AR-15 which I am hopefully trading for a club car (supposedly runs great) next week. I know it won't have as much *** as the g1 and probaby not as fun, but it has reverse and I plan on putting a clone motor in it eventually-Electric start this time. I miss the ole G1 already. We had some good times together.
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