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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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05-07-2014, 06:42 PM | #1 |
Gone Wild
Join Date: Oct 2010
Location: Pittsburgh Pa
Posts: 1,551
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G2 secondary clutch spring preload?
Hey guys. I installed a G2 rear end in my G1 along with a clone motor and I have been using the stock G1 spring in the G2 clutch and I believe it is geared a little low for my liking. I was doing some searching on here and several people have suggested using the stock G2 spring on setting B-2. Can someone please tell me what that means? I know the clutch has holes in it to hold the tips of the spring but are the holes labeled with numbers and letters? What about preload? Does using the B-2 setting preload the spring? I don't have my cart with me now and won't get to work on it until this weekend when I go to camp. I'm just trying to get a better understanding of what this B-2 setting is. Thanks
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05-08-2014, 07:24 AM | #2 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G2 secondary clutch spring preload?
I can't find any info on this either Gary. The holes must have letter/number designations on some models. Can't seem to find any pics though. The preload comes when you insert the spring into the hole, you spin the moveable sheave one direction to wind the spring up, not sure on the direction though. Wonder how many turns to spin it?
I'm using the Plowman's G1 clutch right now, it runs really good, but I'm wondering if I'm leaving some acceleration on the table? Anxious to see what your results are. |
05-08-2014, 03:32 PM | #3 |
Gone Wild
Join Date: Oct 2012
Location: Knoxville, IA - The Sprint Car Capital of the World!
Posts: 301
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Re: G2 secondary clutch spring preload?
The holes for the spring tangs on the spring seat and sliding sheave are labeled with the numbers and letters. Numbers on one, letters on the other (can't remember off the top of my head which is which). B-2 simply indicates hole B on one end and hole 2 on the other.
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05-08-2014, 07:08 PM | #4 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G2 secondary clutch spring preload?
Nice. I'll have to take a look at mine.
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05-08-2014, 08:28 PM | #5 | |
Gone Wild
Join Date: Oct 2010
Location: Pittsburgh Pa
Posts: 1,551
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Re: G2 secondary clutch spring preload?
Quote:
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05-09-2014, 06:23 AM | #6 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G2 secondary clutch spring preload?
I have a spare G2 clutch just begging me to give it a try! LOL I'll see how you do with yours, if it makes a difference, I'll switch mine out.
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05-09-2014, 06:56 AM | #7 | |
maintaining a low profile
Join Date: Oct 2009
Location: SW Virginia USA
Posts: 6,313
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Re: G2 secondary clutch spring preload?
Quote:
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05-12-2014, 07:52 PM | #8 |
Gone Wild
Join Date: Oct 2010
Location: Pittsburgh Pa
Posts: 1,551
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Re: G2 secondary clutch spring preload?
I installed the G2 spring this weekend and I like the results. Just like others have mentioned, B-2 seems to be the sweet spot with the Big Block set up. Basically I have more torque throughout all rpm range. With the G1 spring installed it would take off strong then upshift hard and the torque seemed to drop off quickly. I'm happy with the change.
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05-13-2014, 06:46 AM | #9 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G2 secondary clutch spring preload?
This is good info!
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05-14-2014, 06:27 PM | #10 |
Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,433
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Re: G2 secondary clutch spring preload?
The preload causes it to run higher rpm at part throttle and to downshift faster (since its already higher rpm also). This is ideal for trail use, it works little better to have more preload. However with a clone or other larger engine unless you have huge tires and serious offroad riding the larger engine typically has more torque and does not need to rev at part throttle that much, so many go back to a stock spring with a larger engine. I have a umax in my clone and it works great on the trail but revs around houses. I have no preload at all on it now and its not bad but it can short shift when you spin and lower rpm a little because of that. I want to get a new spring stock and try it, my old one is toast. When I come home late I want it quieter lol. On trails the umax rules, its a yamaha utility spring, its longer and stronger than stock, and about half way to max speed it starts to work much like stock, below that the rpm is always higher except WOT is about the same.
Yes you can wind a lot of preload if you want, and it will stay at WOT rpm all the time. The cart will not move faster until it revs high, it will not shift out at all. Its noisy and takes a lot more fuel. The holes are at different degrees so you can preload more/less degrees of rotation on the spring, the B2 is just the yamaha stock setting which is good all around setting. If you drive along at say a steady 10mph, more preload will make it rev more while you do that. |
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