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150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum

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  #1  
Old 11-19-2009, 06:00 AM
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mgolden94 mgolden94 is offline
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Default Need help!!

hey i have a carter talon 150cc. the top end mph is like 41mph, which is great, but i need to beat out a carter interceptor gtr250. which has a top end of about 49mph. please help me out here guys ive already got all the normal mods covered: uni filter, 32mm carb, variator, rollers, belt, clutch and bell, custom intake, spark plug, cdi, coil...and a few more. i dont have a camshaft though or any custom gearing setup...any advice? (i need to be pullin about 55mph at top speed)
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Old 11-19-2009, 07:01 AM
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joshstep1 joshstep1 is offline
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If you don't mind sacrificing some more low end torque, you could change up the gear on the axel, but thats a lot of buggy you have to take apart. I'm not sure where you could buy one of these, but I think there is someone on this forum that had done this, but he put a larger gear on it for some serious low end.
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Old 11-19-2009, 09:20 AM
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I have a gtr 300, and I gps'ed it at 35mph. the speedo said 48. are those speeds with a gps? the factory speedo on the gtr's are about 5-8 mph fast. unless that gtr has had a speed kit ( larger top sprocket )

My wifes 150 will gps at 42 mph at 10,320 rpm
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Old 11-19-2009, 10:11 AM
BPNWMike BPNWMike is offline
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Upgrade the exhaust? And if you want to get the real benefit of the 32mm carb you should be running a big bore kit with that exhaust.

Also, an A9 or A10 cam should get you some more top end.
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Old 11-19-2009, 05:41 PM
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mgolden94 mgolden94 is offline
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Default okay gotcha

cool these are all great things to hear, and the gtr's speed was on the factory speedo. i gps'd mine at about 41. but that's bone stock. what do yall think is about the VERY top speed i could get this little beast up to?
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Old 11-19-2009, 05:53 PM
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Ya know, BigE is right. I broke my NAV before I was able to do a top speed run on my GTR but I don't think you'll get 49 mph out of it. The speedo is not accurate on them.
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