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Yamaha Excitor rear sprocket

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Please forgive me if this has been previously answered. I have 2 bikes, an Excitor 150 and a Honda CB500X. I've found myself riding the Yamaha more often. I've installed a 7l fuel tank, rear box and a front light bar set. I definitely need a suspension upgrade. I was thinking about a very slightly smaller rear sprocket to make the speedo a bit more accurate and also attempt to reduce the RPM a bit at cruise. My question is, can. I increase the HP a bit to offset the deficit I'll get with the larger rear sprocket by improving the air filter and exhaust or should I just leave it be? If yes,what upgrades are recommended?

Thanks all

Jerry

Edited by JerryRichard
To be more specific

A nap is recommended then clarify smaller or larger sprocket

  • 2 months later...
On 4/26/2026 at 1:49 PM, JerryRichard said:

Please forgive me if this has been previously answered. I have 2 bikes, an Excitor 150 and a Honda CB500X. I've found myself riding the Yamaha more often. I've installed a 7l fuel tank, rear box and a front light bar set.

I definitely need a suspension upgrade. I was thinking about a very slightly smaller rear sprocket to make the speedo a bit more accurate and also attempt to reduce the RPM a bit at cruise.

My question is, can. I increase the HP a bit to offset the deficit I'll get with the larger rear sprocket by improving the air filter and exhaust or should I just leave it be? If yes,what upgrades are recommended?

Thanks all

Jerry

Hello, a smaller rear sprocket will lower cruising RPM, but you'll lose a bit of acceleration. An aftermarket air filter and exhaust alone won't add enough horsepower to make up for that unless you also tune the ECU. If you're only going one tooth smaller on the rear, I'd try that first and leave the engine stock. Prioritize the suspension upgrade—it'll make a much bigger difference in everyday riding.

Edited by brucecotta

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