has Yamaha G2 Bogging dowm

nzdrew · 11-03-2018, 04:05 AM

I have had to remove the air inlet pipe (the square one the runs across the the starter/generator) and partially tape up the hole to the air box to make the cart run correctly. Without that, it starts and bogs - so no acceleration. While it's running fine with the tape on, I don't feel good about my cart needing tape to run! The airbox is new, and seals correctly - as are the air filters. Any ideas? Or should I stop being a purist and let sleeping dogs lie...

CP241 · 11-03-2018, 07:41 AM

If you have to choke it off, then generally that either means the airbox lid is not 100% sealed or you've got a carburetor problem. Is the carb the OEM carb or a $20 Chinese one? If it the OEM carb, give it a good cleaning. If it's a chinese one then get an OEM mikuni or it will probably never run right...

nzdrew · 11-10-2018, 09:42 PM

Thanks for for that. The problem has gotten worse - the cart started bogging down, then stopped and now it won't run at all. I opened up the airbox - it's a new one. There was a rag around the air filter, soaked with oil and the filter itself is soaked. Any suggestions? Cheers, Drew

CP241 · 11-11-2018, 09:18 AM

Usually the air box will fill with oil from the breather hose if it is overfilled with oil. 1 quart exactly is what it needs, no more.

That wont however, cause it to not run. Do you have spark? Is it an OEM carb or a cheap knockoff? Search around the forum, you'll see how many people have had nothing but problems with their cart. Then they install an OEM carb and magically everythjng is fixed.

nzdrew · 11-11-2018, 03:56 PM

Hmmmm. I don't know about the carb, the cart has had plenty of enthusiastic amateurs work on it over the years, so possible that the carb has been changed. How would I tell? Cheers, Drew

CP241 · 11-11-2018, 06:10 PM

It should say mikuni on the side of it.

If it says anything BUT mikuni then it's not an OEM carb and your best bet would be to find an OEM mikuni

nzdrew · 11-11-2018, 07:29 PM

Awesome - thanks.

CP241 · 11-11-2018, 08:41 PM

I do have a spare mikuni if you only have an aftermarket. I haven't tested it but cleaned it in an ultrasonic cleaner so it should be good to go, but I'd recommend a new gasket for the carb bowl. I have no idea if this gasket is any good or not, I've never used this carb.

nzdrew · 11-11-2018, 09:59 PM

That's a very kind offer, but given I live in New Zealand somewhat logistically challenging! BuggiesUnlimited say they have a genuine one that is rebuilt for $42 Would that be a better proposition than risking a failure in a Chinese one? Cheers,

cgtech · 11-14-2018, 06:33 PM

New G2 carburetor from Yamaha retail price is $314.99, so we can safely assume it's not genuine Yamaha/mikuni. I work at a Yamaha dealer, so I did see the wholesale/dealer cost, and I can tell you BU would be losing a huge amount of money selling a real one for $42. And I did look at the BU website, it doesn't say rebuilt anywhere and in the questions below the part listing, they won't say it's a "genuine Yamaha part" (because it isn't).

11-03-2018, 04:05 AM	#1
nzdrew Not Yet Wild Join Date: Jun 2016 Location: Auckland New Zealand Posts: 71	has Yamaha G2 Bogging dowm I have had to remove the air inlet pipe (the square one the runs across the the starter/generator) and partially tape up the hole to the air box to make the cart run correctly. Without that, it starts and bogs - so no acceleration. While it's running fine with the tape on, I don't feel good about my cart needing tape to run! The airbox is new, and seals correctly - as are the air filters. Any ideas? Or should I stop being a purist and let sleeping dogs lie...

11-03-2018, 07:41 AM	#2
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,682	Re: has Yamaha G2 Bogging dowm If you have to choke it off, then generally that either means the airbox lid is not 100% sealed or you've got a carburetor problem. Is the carb the OEM carb or a $20 Chinese one? If it the OEM carb, give it a good cleaning. If it's a chinese one then get an OEM mikuni or it will probably never run right...

11-10-2018, 09:42 PM	#3
nzdrew Not Yet Wild Join Date: Jun 2016 Location: Auckland New Zealand Posts: 71	Re: has Yamaha G2 Bogging dowm Thanks for for that. The problem has gotten worse - the cart started bogging down, then stopped and now it won't run at all. I opened up the airbox - it's a new one. There was a rag around the air filter, soaked with oil and the filter itself is soaked. Any suggestions? Cheers, Drew

11-11-2018, 09:18 AM	#4
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,682	Re: has Yamaha G2 Bogging dowm Usually the air box will fill with oil from the breather hose if it is overfilled with oil. 1 quart exactly is what it needs, no more. That wont however, cause it to not run. Do you have spark? Is it an OEM carb or a cheap knockoff? Search around the forum, you'll see how many people have had nothing but problems with their cart. Then they install an OEM carb and magically everythjng is fixed.

11-11-2018, 03:56 PM	#5
nzdrew Not Yet Wild Join Date: Jun 2016 Location: Auckland New Zealand Posts: 71	Re: has Yamaha G2 Bogging dowm Hmmmm. I don't know about the carb, the cart has had plenty of enthusiastic amateurs work on it over the years, so possible that the carb has been changed. How would I tell? Cheers, Drew

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11-11-2018, 06:10 PM	#6
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,682	Re: has Yamaha G2 Bogging dowm It should say mikuni on the side of it. If it says anything BUT mikuni then it's not an OEM carb and your best bet would be to find an OEM mikuni

11-11-2018, 07:29 PM	#7
nzdrew Not Yet Wild Join Date: Jun 2016 Location: Auckland New Zealand Posts: 71	Re: has Yamaha G2 Bogging dowm Awesome - thanks.

11-11-2018, 08:41 PM	#8
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,682	Re: has Yamaha G2 Bogging dowm I do have a spare mikuni if you only have an aftermarket. I haven't tested it but cleaned it in an ultrasonic cleaner so it should be good to go, but I'd recommend a new gasket for the carb bowl. I have no idea if this gasket is any good or not, I've never used this carb.

11-11-2018, 09:59 PM	#9
nzdrew Not Yet Wild Join Date: Jun 2016 Location: Auckland New Zealand Posts: 71	Re: has Yamaha G2 Bogging dowm That's a very kind offer, but given I live in New Zealand somewhat logistically challenging! BuggiesUnlimited say they have a genuine one that is rebuilt for $42 Would that be a better proposition than risking a failure in a Chinese one? Cheers,

11-14-2018, 06:33 PM	#10
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: has Yamaha G2 Bogging dowm New G2 carburetor from Yamaha retail price is $314.99, so we can safely assume it's not genuine Yamaha/mikuni. I work at a Yamaha dealer, so I did see the wholesale/dealer cost, and I can tell you BU would be losing a huge amount of money selling a real one for $42. And I did look at the BU website, it doesn't say rebuilt anywhere and in the questions below the part listing, they won't say it's a "genuine Yamaha part" (because it isn't).

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