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Yamaha Top end??

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Old 07-15-2011, 05:29 PM   #1
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Yamaha Top end??

I have an 1978 yamaha 80cc 2 stroke street legal trail bike. Just cleaned the carb, air filter, and allowed more air flow. The throttle response is better however it still lacks power in third gear. My friend has the exact same model yet it gains 5mph on me and is better on hills. Any ideas???
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Old 07-15-2011, 05:30 PM   #2
it's about the off-road miles
tacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shedtacokid09 is one of the sharper tools in the shed
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is it the same gearing?
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Old 07-15-2011, 05:34 PM   #3
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whitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shed
 
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Yup same gearing. I thought that too but his would probably slower off the start.
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Old 07-15-2011, 05:35 PM   #4
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BLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shed
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Maybe your jetting is off?
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Old 07-15-2011, 05:40 PM   #5
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whitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shed
 
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Both have the same stock jets and I tuned the card quite a bit. Third gear just doesnt seem to rev that high when im pinning it. I know 2 strokes have more power in lower gears but something isnt right
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Old 07-15-2011, 05:45 PM   #6
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BLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shedBLKTRD6SP is one of the sharper tools in the shed
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You weigh more than your friend?
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Old 07-15-2011, 05:46 PM   #7
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whitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shedwhitetaco01 is one of the sharper tools in the shed
 
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More like 20lbs less.
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