Yamaha G1 Speed Low Top Speed

Chris_feldk · 09-16-2022, 09:13 PM

I had recently got my g1 running and it seems to run pretty good. I am wondering if there are any ways to speed it up, i have put a longer screw in the governor spring and jetted the carb. I have a tachometer installed and it revs near 6000 rpm and gets only about 14 Mph i believe i have 18 inch tires as well just really wondering if there is a way i can speed it up. Any ideas will be greatly appreciated, Thank you!

CP241 · 09-16-2022, 09:28 PM

Check your clutch operation. Worn clutches can degrade performance in major ways. After all, they are what transfers engine power to motive force.

DOOmsman · 09-17-2022, 01:36 PM

Cp is right, also check that belt is not to long(stretched) or worn (to narrow).

Chris_feldk · 09-17-2022, 01:45 PM

It also seems that the clutch and belt get extremely hot and is even uncomfortable to just touch the belt. I might end up changing it. I'll let you guys know!

slonomo · 09-17-2022, 08:41 PM

If you have heat on the belt, that means it's slipping. Could be a belt issue or clutch issues. Make sure you get a "OE" quality belt, I've never had good luck with cheap ebay or amazon belts.

Chris_feldk · 09-18-2022, 06:22 PM

Quote:

Originally Posted by slonomo

If you have heat on the belt, that means it's slipping. Could be a belt issue or clutch issues. Make sure you get a "OE" quality belt, I've never had good luck with cheap ebay or amazon belts.

I believe I have the original belt that came with it or might have only replaced once i will buy a OE one and install it.

Curt-IA · 09-20-2022, 09:41 AM

The OEM Yamaha belt is only a few dollars more than the cheapo amazon/ebay ones. I would definitely get the OEM, like they said the belt makes or breaks the overall performance of the clutches. If it is too long or narrow it's like trying to start in 3rd gear in a 5 speed vehicle, and you never reach top speed either, really hampers performance.

You can make sharpie marks on the primary clutch sheaves and see how much of it rubs off after a top speed run. That shows you how far the belt is travelling up the sheave.

CP241 · 09-17-2022, 08:45 PM

https://www.youtube.com/watch?v=uCEvBGT8twM

This video explains clutching and how it should work so you know what to look for

griffo002 · 10-03-2022, 12:10 AM

I did that to my governor and it went like a bullet.....Jack it up and check the clutches are working properly.

Chris_feldk · 10-03-2022, 12:31 PM

Quote:

Originally Posted by griffo002

I did that to my governor and it went like a bullet.....Jack it up and check the clutches are working properly.

i have before it looks fine. how fast do you think your motor reved? I keep mine casually at 5500 rpm and nothing has happened yet.

09-16-2022, 09:13 PM	#1
Chris_feldk Not Yet Wild Join Date: Sep 2022 Location: North Ridgeville, Ohio Posts: 57	Yamaha G1 Speed Low Top Speed I had recently got my g1 running and it seems to run pretty good. I am wondering if there are any ways to speed it up, i have put a longer screw in the governor spring and jetted the carb. I have a tachometer installed and it revs near 6000 rpm and gets only about 14 Mph i believe i have 18 inch tires as well just really wondering if there is a way i can speed it up. Any ideas will be greatly appreciated, Thank you!

09-16-2022, 09:28 PM	#2
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: Yamaha G1 Speed Low Top Speed Check your clutch operation. Worn clutches can degrade performance in major ways. After all, they are what transfers engine power to motive force.

09-17-2022, 01:36 PM	#3
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Yamaha G1 Speed Low Top Speed Cp is right, also check that belt is not to long(stretched) or worn (to narrow).

09-17-2022, 01:45 PM	#4
Chris_feldk Not Yet Wild Join Date: Sep 2022 Location: North Ridgeville, Ohio Posts: 57	Re: Yamaha G1 Speed Low Top Speed It also seems that the clutch and belt get extremely hot and is even uncomfortable to just touch the belt. I might end up changing it. I'll let you guys know!

09-17-2022, 08:41 PM	#5
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: Yamaha G1 Speed Low Top Speed If you have heat on the belt, that means it's slipping. Could be a belt issue or clutch issues. Make sure you get a "OE" quality belt, I've never had good luck with cheap ebay or amazon belts.

09-20-2022, 09:41 AM	#7
Curt-IA Not Yet Wild Join Date: May 2021 Posts: 7	Re: Yamaha G1 Speed Low Top Speed The OEM Yamaha belt is only a few dollars more than the cheapo amazon/ebay ones. I would definitely get the OEM, like they said the belt makes or breaks the overall performance of the clutches. If it is too long or narrow it's like trying to start in 3rd gear in a 5 speed vehicle, and you never reach top speed either, really hampers performance. You can make sharpie marks on the primary clutch sheaves and see how much of it rubs off after a top speed run. That shows you how far the belt is travelling up the sheave.
Curt-IA Not Yet Wild Join Date: May 2021 Posts: 7

09-17-2022, 08:45 PM	#8
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: Yamaha G1 Speed Low Top Speed https://www.youtube.com/watch?v=uCEvBGT8twM This video explains clutching and how it should work so you know what to look for

10-03-2022, 12:10 AM	#9
griffo002 Gone Wild Join Date: Aug 2018 Location: Down under Posts: 180	Re: Yamaha G1 Speed Low Top Speed I did that to my governor and it went like a bullet.....Jack it up and check the clutches are working properly.

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