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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles

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Old 03-15-2011, 11:19 AM   #1
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Join Date: Sep 2010
Location: Erie, Pennsylvania
Posts: 989
Default Downhill operation of 97 "G16"

I have a question re: normal downhill operation of my 97 G16. When going downhill is it normal for the cart to be in full coast, without any engine braking?? My previous cart was an ancient "Harley" 3 wheeler, which would allow engine braking when going downhill, and was nice to have. My Yamaha does not do that and requires quite a bit of braking. Was just wondering if that is normal or do I have a problem?
I recently put a power kit into the secondary clutch, new rollers and bushing into the primary clutch, plus a new drive belt. Both clutches have been greased. The clutch work did not affect the downhill operation at all, (the same before and after). This cart is fairly new to me as of late last year. It has not been lifted and has original size tires. Thanks for any help you can provide.

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Old 03-15-2011, 02:41 PM   #2
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Join Date: Jun 2009
Location: West MI
Posts: 15,327
Default Re: Downhill operation of 97 "G16"

Pretty sure that is a function of the spring in the secondary. You can't with aftermarket springs, but if you wind the stock spring tighter the engine will actually stay at the same rpm all the time as it would WOT. It revs high all the time no matter the speed/throttle unless you go under 5mph or whatever. So when you go down a hill it will brake, but going on flat ground it will not shift back to reduce rpm and will make more noise and take more gas. Of course you can wind it to any degrees in between that for partial braking/backshifting action. Most have three holes for the ends of the spring to go in that are offset, so when you wind it you get different degrees of preload. I think stock is 60 degrees? I'd have to look was thinking it is about a third turn all the way on the ramp. Also it can cool better at more rpm but not sure it matters that much with a typical cart. I had mine set tighter for a while but ended up letting it way off so it shifts more at partial throttle like a stock cart.

The aftermarket springs are difficult, but the stock spring once the sheave has been removed recently you can pop it off and move it and if you have a little strength you can put it right back on by hand. I did mine maybe half dozen times in a row playing with it, and modded some other things in there to make it tow better.
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