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Honda Grom (MSX125) Forums
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Honda Monkey Tune
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<blockquote data-quote="69ST" data-source="post: 190363" data-attributes="member: 5"><p>Again, I am unfamiliar with your local road situation. If they're mostly flat, you should be able to get those numbers without opening the engine. The biggest restriction one these bikes seems to be gearing; they are seriously over-geared and that has been addressed time & again since the first Grom reached US shores. Next up is the airbox, followed by the exhaust. Those are what might be termed "free" power adders, I consider them just optimal tuning and that's where I'd begin. Honda did everyone a big favor, designing these as "unstressed" engines, in stock form. That just means that they can be run WOT without hurting parts. See what you can pull out of the stock motor. These are 65mph bikes, motor left unmolested.</p><p></p><p>I would point out that if your Grom could only manage 50mph where you ride, you're going to need another 5-6hp to reach & sustain 60mph. You're giving me the impression that you need a lot more torque than is possible from a stock stroke.</p><p></p><p>[ATTACH=full]68461[/ATTACH]</p></blockquote><p></p>
[QUOTE="69ST, post: 190363, member: 5"] Again, I am unfamiliar with your local road situation. If they're mostly flat, you should be able to get those numbers without opening the engine. The biggest restriction one these bikes seems to be gearing; they are seriously over-geared and that has been addressed time & again since the first Grom reached US shores. Next up is the airbox, followed by the exhaust. Those are what might be termed "free" power adders, I consider them just optimal tuning and that's where I'd begin. Honda did everyone a big favor, designing these as "unstressed" engines, in stock form. That just means that they can be run WOT without hurting parts. See what you can pull out of the stock motor. These are 65mph bikes, motor left unmolested. I would point out that if your Grom could only manage 50mph where you ride, you're going to need another 5-6hp to reach & sustain 60mph. You're giving me the impression that you need a lot more torque than is possible from a stock stroke. [ATTACH=full]68461[/ATTACH] [/QUOTE]
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