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Aftermarket Engine/Parts
Lifan
New 125 Sputters through all throttle/idle
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<blockquote data-quote="TNStreamerDreamer" data-source="post: 181645" data-attributes="member: 11742"><p>Shoot alright. I was just doing some rough numbers and with a 17/31 the other bike was running around 6,000rpm at 40mph on 15.5" OD tires. My new rear should be 18.6" OD so if I did my rough math right I was thinking I would be able to cruise 40mph at around 5,000 rpm with the same tooth ratio. I don't expect I could ever hit 7,500 rpm in 4th with the bigger wheels and same ratio though. Is that a big no-no?</p></blockquote><p></p>
[QUOTE="TNStreamerDreamer, post: 181645, member: 11742"] Shoot alright. I was just doing some rough numbers and with a 17/31 the other bike was running around 6,000rpm at 40mph on 15.5" OD tires. My new rear should be 18.6" OD so if I did my rough math right I was thinking I would be able to cruise 40mph at around 5,000 rpm with the same tooth ratio. I don't expect I could ever hit 7,500 rpm in 4th with the bigger wheels and same ratio though. Is that a big no-no? [/QUOTE]
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Aftermarket Engine/Parts
Lifan
New 125 Sputters through all throttle/idle
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