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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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06-23-2019, 09:54 PM | #11 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,642
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Re: I need some advice on a clutch spring
I see it is $33 at partzilla. IMHO Worth trying before spending BIG $'s at Plowmans
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06-23-2019, 10:17 PM | #12 | |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
Quote:
I felt the primary clutch and I can feel some little ridges in them but nothing too deep. Should I replace it or just rebuild it? |
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06-24-2019, 07:31 AM | #13 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,642
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Re: I need some advice on a clutch spring
Some people here seem to give the impression that there is some "magic" that can be performed on primary and secondary clutches. No mater what spring or weights are used in the primary it's low low stays the same and its high high stays the same. I.E. Say the primary goes from 1:3 to 3:1. The secondary goes in a similar fashion. So in these "magic" kits the intermediate ratios are change by altering the shape of the sheath or stiffness of the spring in the secondary and changing the springs and or weights in the primary.BUT unless you change the diameter of one of the clutches the low to high overall ratio dies not change one iota.
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06-24-2019, 01:46 PM | #14 |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
Wow, you understand this stuff more than I do. It makes sense to me though. So basically your only changing the middle of the powerband then.
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06-24-2019, 03:54 PM | #15 |
maintaining a low profile
Join Date: Oct 2009
Location: SW Virginia USA
Posts: 6,316
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Re: I need some advice on a clutch spring
Yes. The stiffer spring will hold a lower gear longer, if that makes any sense. There's no magic. The Umax spring is engineered by Yamaha to perform with their stock engine, and it works quite well.
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06-25-2019, 05:29 AM | #16 |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
I'm sure it will work for what I need it for. Between the umax spring and the engine being bumped up a touch I should be able to climb those hills. I talked the guy who's going to rebuild my engine yesterday. He's going to rebuild the primary clutch at the same time and I just ordered the secondary clutch from Vegas carts so that should be shipping soon. When that gets here I'll combine that with the umax stuff.
A little off subject but does anyone know a good place to get steering components like stuff to rebuild the steering box, tie rods, kingpins, etc...? |
08-30-2019, 06:27 PM | #17 |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
The cart's together and after a week of breaking it in I did a trial run of one of the hills on my course with myself and my son. We barely made it up the hill. The umaxx spring is set to B-3 right now, any suggestions on what to change it to gain more torque? If we had golf bags, cooler, etc... I would have my doubts if we would have made it up that hill...
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08-31-2019, 08:04 AM | #18 | |
maintaining a low profile
Join Date: Oct 2009
Location: SW Virginia USA
Posts: 6,316
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Re: I need some advice on a clutch spring
Quote:
Did you turn the helix/tighten the spring to get the ramps past slides on the sheave? It will make a difference. The ramps should be riding on the slides as the sheave is drawn in. |
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08-31-2019, 08:59 AM | #19 |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
Yup, when I installed it I set it at B-3, turned it clockwise until it made it past the first ramp I came to and clamped it and put the key in. As near as I can tell it's always sitting on the ramps when at a dead stop, when it's moving it's too fast for me to see how it's sliding. I'm sure this wouldn't have anything to do with it but the secondary seems to have a wonk in it to. When you rotate it you see it wobble in one certain area and as near as I can tell the shaft is pretty straight. It might be due to that spacer bushing I put in.
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08-31-2019, 09:03 AM | #20 |
Gone Wild
Join Date: Aug 2013
Location: AZ
Posts: 383
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Re: I need some advice on a clutch spring
I forgot to mention, it does pretty good on the rest of the course, it's just on those 2 hills it bogs down and doesn't have the power to climb them at a decent pace.
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