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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



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Old 03-07-2017, 12:49 PM   #1
austindebalski
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Default Backfiring G1

Just looking for some help. My g1 backfires some. Was wondering if anyone has a fix for that.
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Old 03-07-2017, 07:49 PM   #2
smallblock450sl
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Default Re: Backfiring G1

First check the throttle shaft is closing all the way.
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Old 03-08-2017, 10:07 PM   #3
austindebalski
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Default Re: Backfiring G1

My throttle linkage was missing when I got it. I have a piece of silver solder as my linkage. It's loose do you know where to buy one?
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Old 03-09-2017, 12:02 PM   #4
Lochlin
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Default Re: Backfiring G1

The part number for that should be FU99-450. If you Google that you'll get some hits. You may want to check with some of the site sponsors as they help pay the bills around here.
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Old 03-09-2017, 04:37 PM   #5
wicked872
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Default Re: Backfiring G1

another thing to check is where the throttle shaft goes through the carb, when it gets worn badly it allows it to suck air around the shaft leaning out the mixture also it misaligns the throttle plate so sometimes when you let up on the pedal it doesn't close all the way.
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Old 03-10-2017, 06:56 AM   #6
juicedstang999
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Default Re: Backfiring G1

I just put a brand new carb on my 85 G1 for the very same reason of backfiring and it turned out to be the crank shaft seals were leaking creating a lean misfire... You might want to look into a leak down test.
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Old 03-10-2017, 07:24 AM   #7
austindebalski
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Default Re: Backfiring G1

I looked up the part #. I may have said it wrong. It's not the whole linkage. Just the piece from the governor to carb (6").
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Old 03-10-2017, 07:42 AM   #8
Spicyunicorn
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Default Re: Backfiring G1

A leak down test won't determine if crank seals are bad
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Old 03-10-2017, 09:56 AM   #9
Lochlin
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Default Re: Backfiring G1

Quote:
Originally Posted by austindebalski View Post
I looked up the part #. I may have said it wrong. It's not the whole linkage. Just the piece from the governor to carb (6").
I don't see that part specifically called out anywhere so it's probably not made. You may have to keep an eye out for a used one or just replace the whole thing.
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Old 03-11-2017, 08:30 AM   #10
juicedstang999
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Default Re: Backfiring G1

Quote:
Originally Posted by Spicyunicorn View Post
A leak down test won't determine if crank seals are bad
Umm... I think you have a compression test confused with a leakdown test... The ONLY WAY you determine a crank seal, cylinder base, head gasket, etc... is through a leakdown/pressure test. Trust me I run/manage a Power Equip. business for the last 23 years.
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