## Re: qt50 gear ratios and rpm explained

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Sorry to bring back one of my long dead threads but I wanted to add to what I said. The stock qt rear gears are 10/57 and the pw gears are 11/54. This gives you a 12.5% top speed increase at the same engine rpm. With the pw gears 30mph equates to the engine turning at 6,853rpm instead of 7,791rpm with the qt gears. I GPSed my bike today to check the acuracy of my 1422mm wheel circumferance measurement and I'm dead on, I'm actually really suprised that it wasn't off by atleast 1mph at 40+mph but it wasn't off at all. I GPSed my bike at 43mph in a half tuck on flat ground with no wind. I'm wanting more power to kick in at 40mph to push hard to 50mph and so I want to build a pipe for that rpm. 40mph with the pw gears equates to the engine running at 9,141rpm. What I want to know is is it smart to sustain my engine at that rpm? Before doing the math I didn't know I was sustaining 9.5Krpm! I want to hit 50mph but at that speed the engine will be rotating at 11,374rpm!(sounds like disaster to sustain it there but then again I don't know). Is it just smarter to lengthen my drive shaft and run a larger diameter rim and tire????? Thanks. Ryan.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
qt50 gear ratios and rpm explainedTopic by: Ryan 05/29/09 08:49AM
Re: qt50 gear ratios and rpm explainedRe: paul h 08/29/09 03:56PM
Re: qt50 gear ratios and rpm explainedRe: Josh 09/20/09 03:01AM
Re: qt50 gear ratios and rpm explainedRe: Josh 09/20/09 03:41AM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 02:00AM
Re: qt50 gear ratios and rpm explainedRe: Flagrant - 09/20/09 05:11PM
Re: qt50 gear ratios and rpm explainedRe: Bear Dave 09/21/09 03:00AM
Re: qt50 gear ratios and rpm explainedRe: Flagrant - 09/21/09 02:39PM
Re: qt50 gear ratios and rpm explainedRe: Bear Dave 09/21/09 06:05PM
Re: qt50 gear ratios and rpm explainedRe: Flagrant - 09/21/09 06:10PM
Re: qt50 gear ratios and rpm explainedRe: Bear Dave 09/24/09 06:17PM
Re: qt50 gear ratios and rpm explainedRe: zeke 09/24/09 11:27PM
Re: qt50 gear ratios and rpm explainedRe: Flagrant - 09/24/09 11:41PM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 06:59AM
Re: qt50 gear ratios and rpm explainedRe: Nash . 04/27/10 05:55AM
Re: qt50 gear ratios and rpm explainedRe: Downhill Harvey (OFMC) 04/27/10 07:28AM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 08:01AM
Re: qt50 gear ratios and rpm explainedRe: Flagrant - 04/27/10 12:59PM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 04:15PM
Re: qt50 gear ratios and rpm explainedRe: bully -+:| 04/27/10 06:38PM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 08:22PM
Re: qt50 gear ratios and rpm explainedRe: Ryan M 04/27/10 08:39PM
Re: qt50 gear ratios and rpm explainedRe: bully -+:| 04/27/10 09:43PM

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