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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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07-02-2019, 11:50 AM | #1 |
Not Yet Wild
Join Date: Jul 2019
Location: South Dakota
Posts: 2
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G1 Minimal Speed Gains
Hello everyone. My father and I have just completed our G1 build and are having an issue with speed. Current setup as follows
-Team Clutches from Plowman's -Plowman's carb upgrade (bigger jets) -Governor removed -Plowman's exhaust But we still can't see speed gains from it. On the other hand, my uncle has a G1 that will walk all over us. His is stock besides the governor removed. Any help/tips would be appreciated. It runs great though, runs smooth, not lacking power by any means just no speed to it. |
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07-02-2019, 06:47 PM | #2 |
Gone Wild
Join Date: Oct 2010
Location: Pittsburgh Pa
Posts: 1,551
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Re: G1 Minimal Speed Gains
What secondary clutch spring are you using? Make sure the clutches aee completely shifting out.
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07-03-2019, 08:06 AM | #3 | |
Gone Wild
Join Date: Jan 2017
Location: venice
Posts: 1,806
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Re: G1 Minimal Speed Gains
Quote:
jack it up and make sure the clutches are operating properly |
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07-03-2019, 11:44 AM | #4 |
Not Yet Wild
Join Date: Jul 2019
Location: South Dakota
Posts: 2
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Re: G1 Minimal Speed Gains
Off the top of my head I don't know what springs it has. Clutches are engaging fully and backing off like they should, I run Team Clutches on my snowmobile so I know how they are supposed to function. I can get a top speed tonight, I would say around 20mph, not much more.
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07-03-2019, 03:38 PM | #5 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G1 Minimal Speed Gains
A stock G1 with no governor with stock tires should go 25-30 mph. With mods and bigger tires you can approach 35 mph, some have gotten over 40 mph without too much work.
I'm assuming you have good compression and you are using the stock 2 cycle oiler? If you premix, use a good air cooled 2 cycle synthetic and mix at 85:1 or even 100:1. Does your uncle use the same clutches as you? If not, I'd be looking at the clutches and rpm. Are you running a tachometer? What kind of rpm are you getting? How do you know you're clutches are shifting out fully? Have you observed them while driving? With a load the clutches will shift differently than at an idle. |
07-03-2019, 11:37 PM | #6 |
Gone Wild
Join Date: Mar 2018
Location: The Desert
Posts: 248
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Re: G1 Minimal Speed Gains
The cylinder bore size is the same however the intake tract and reeds are smaller. What year G1? My 82 has some work close to what you have and with 22" tires I get 20mph. 82 has a smaller cylinder and will be a tick slower in my opinion. I tried a torque spring in my secondary and it would not shift fully under load but it would with the wheels off the ground so I went back to the stocker. Are you sure the carb butterfly is going to WOT?
Last edited by dezrcr822; 07-03-2019 at 11:39 PM.. Reason: more cylinder info. |
07-03-2019, 11:41 PM | #7 |
Gone Wild
Join Date: Mar 2018
Location: The Desert
Posts: 248
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Re: G1 Minimal Speed Gains
Sorry if the post is confusing. I wanted to edit my post and thought the first sentenance would be at the end of the post.
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07-04-2019, 01:51 PM | #8 |
Not Yet Wild
Join Date: May 2016
Location: San Diego
Posts: 50
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Re: G1 Minimal Speed Gains
Do you still have the exhaust butterfly if so is it working properly? You may want to remove it.
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07-04-2019, 10:52 PM | #9 |
Gone Wild
Join Date: Oct 2010
Location: Pittsburgh Pa
Posts: 1,551
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Re: G1 Minimal Speed Gains
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07-08-2019, 07:35 AM | #10 |
Gone Wild
Join Date: May 2011
Location: Pittsburgh
Posts: 2,941
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Re: G1 Minimal Speed Gains
Don't discount a clutch issue. If your clutches aren't opening / closing properly they will hold the engine back.
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