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



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Unread 10-05-2010, 11:52 PM   #1
Not Yet Wild
 
Join Date: Oct 2010
Posts: 65
Default New and have some questions

ok first i just randomly decided to look for a forum on this so i could get some basic info. I have a yamaha gas cart and cant seem to find any plates or markings to tell what it is.judging by the pictures its either a g6 or g7 i think but i saw somewhere that they all had the same engine. i noticed it has a very small carb on it maybe a mikuni 16mm or so. are carb swaps common on these? it looks like it could seriously benefit from a bigger carb. also the exhaust looks like its about 3/8 i/d maybe half inch. i assume thats to keep it quiet but i believe its like a 285cc or something like that. are there major gains to be had in the exhaust? everything on the spec sheets for these seems normal i.e. 8:1 compression and such. both carb and exhaust seem way too small. i have a 22mm mikuni and could make an intake for it, ive already done it for the carb once on my gx160 mini bike. i guess my quesion is will an exhaust make a decent difference and is the intake manifold fabrication worth it to put a bigger carb on? thanks
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Unread 10-06-2010, 12:00 AM   #2
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Yamaha
 
Join Date: Nov 2008
Location: Central Texas
Posts: 5,632
Default Re: New and have some questions

Welcome Dusty. First off, take a look in the Gas Yamaha header section for lots of advice on determining what cart you have, that will really help you out here. Second, even with bigger carb and exhaust you are still building on what started out at 9 hp. There are some very high performance small motors on here but it takes a lot of time, money and ingenuity to make a big difference in a small motor....Good Luck on what you decide to do and keep us updated!
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Unread 10-06-2010, 12:06 AM   #3
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Default Re: New and have some questions

thanks for the reply so quick... my thought was say my four wheeler is a 250 ans obvously its a little different but its got like a 35mm cv carb on it and 1 1/4 exhaust. im not really looking for mass torque but a little help for some hills woud be nice. im planning on taking it to my cabin in cascade and using it like a utv. what engine swaps do you recommend? what size input does the tc use?
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Unread 10-06-2010, 12:13 AM   #4
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Default Re: New and have some questions

Most stock carts can benefit from a torque spring install or clutch machining for pulling those hills....find out what cart you have for more help on this.
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Unread 10-06-2010, 06:15 AM   #5
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Location: SW Virginia USA
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Default Re: New and have some questions

Yamaha Time Line

serial number locator's
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