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



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Old 01-30-2016, 04:34 PM   #11
sho305
Vegas modded 420
 
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Yamaha
 
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Location: West MI
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Default Re: Cams for the G2-G14

I looked into it, the G9 ports are tiny, the exhaust I could not even get my little finger in. You can port them, but go far and you break out and have to weld more material on due to being air cooled they are not that thick walled. The clone has way larger ports/valves, its new, its cheap, its larger 420cc, performance parts are all over the place, seemed like a no brainer to me to swap. The journals in the case eventually wear out on the yami too and they knock.

Sounds like a cool build to do one I agree, for me a bigger brand new motor at that cost I could not resist lol. I have two G9 engines that run fine and smoke some, really need to get rid of them or rebuild and sell was my plan but been busy. You need a cam to do anything with these really is my opinion. I am surprised at the power I am getting with the stock cam on my clone with free flow airbox/exhaust header and timing advance, 1.3 rockers, etc., but still stock inside the block. But again it has more port/valve and its 420cc, even the carb is way larger than the G9. I could run WOT and go from 75% to 100% carb opening and it made no difference on the stock G9, though it could have been floating the valves, but at any rpm it made no difference, so I assumed the carb was plenty big for it. I could be wrong. Either way a larger carb (you can buy the ~24mm scooter carbs really cheap) and header and performance cam/springs and little porting would certainly help one of them. Not sure on cost, still think a clone would go by you but you would skunk a stock cart.
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Old 01-31-2016, 09:04 AM   #12
raydhd
VC 460 CLONE GONE WILD
 
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Yamaha
 
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Default Re: Cams for the G2-G14

I don't disagree with going clone but if I had to use a sleeper cart at the golf course a cammed and carbed stocked might be fun.
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Old 01-31-2016, 12:50 PM   #13
sho305
Vegas modded 420
 
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Default Re: Cams for the G2-G14

Nice part about a G1 was you could get a LOT of rpm out of them, that made a stock cart go really fast 30mph was no problem. HS gears would do the same thing on a 4 stroke, though you could try an 8" primary and you might be close with a cammed stock engine. You can get more mph out of the clutches just that nobody does it with GC.
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