Re: QT50 gearing/upgrades

ryan m /

i don't use that email anymore I use this one now since I changed my handle.

Pw's drive shaft and drive shaft housing is shorter.

Pw's have a taller final drive because they use a smaller rear tire, this means that with a pw rear gear swap you'll pull more mph while at the same rpm. It roughly comes out to a 10% increase in mph at the same rpm.

I did a complete tooth count of a towny engine and qt engine and they are almost the same. The qt's gear is the same as the towny's second gear. The towny has a short first that can be rapped the fuck out if you lighten the first gear's clutch.

I'll say this one final time. THERE IS NO REV LIMITER!!! The stock oil injector pumps toooooo much oil and makes the bike four stroke. This is because the pump not only pumps more oil with more throttle input(ala the split cable that goes to the pump) but also pumps more oil in the higher the rpm gets. That is what gets mistaken as the rev limiter. What the previous poster mentioned about the "start" switch limiting revs is true but it limits them soooo low you couldn't do but 5mph. In fact the "start" mode bypasses the normal cdi and engages a second limited cdi that has the limiter but also a wayyyy higher voltage spark. But again you wouldn't do more than 5mph with it selected to "start" so adjust your pump.

To adjust your pump you need to take off the plastic cover and loosen the pumps jam nut and then turn the adjuster nut and then re-tighten the jam nut. Which way you turn the adjuster nut i forget but even the pw50 manual goes into great detail about how to take a dial indicator to fine tune it.

To use a pw50 rear end you either need to press out the axle shaft from the ring gear and press on the pw's ring gear onto the old qt's axle shaft so the axle shaft is the same length or just use washers to take up the slack. Using washers allows you to later run a right side swing arm if you go with a towny engine like I did or fab up your own right side swing arm like I did before getting a towny engine.

If you want a pw50 rear gear and housing email me, I got two extras. I'll trade you for the stock qt rear gear and housing as I want to start to hit the track soon and I think I'll need to tune my bike for acceleration more than top speed as it's a go kart track.

If you got anymore questions just ask.

http://a3.sphotos.ak.fbcdn.net/hphotos-ak-snc6/180889_10150090723141668_834671667_6034171_2416732_n.jpg

this is my qt

Subject Written By Posted
  QT50 gearing/upgradesTopic by: Moto Photog Moto Photog 02/11/11 02:06PM
  Re: QT50 gearing/upgradesRe: Toledo Riot Toledo Riot 02/11/11 02:45PM
  Re: QT50 gearing/upgradesRe: Kevin M Kevin M 02/11/11 02:59PM
  Re: QT50 gearing/upgradesRe: Moto Photog Moto Photog 02/11/11 05:00PM
  Re: QT50 gearing/upgradesRe: Toledo Riot Toledo Riot 02/11/11 05:22PM
  Re: QT50 gearing/upgradesRe: Kevin M Kevin M 02/11/11 06:15PM
  Re: QT50 gearing/upgradesRe: Tate in Madison Tate in Madison 02/11/11 08:40PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/12/11 01:42AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/12/11 01:43AM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 02/12/11 03:24AM
  Re: QT50 gearing/upgradesRe: Dan M Dan M 02/12/11 03:50AM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/13/11 09:35AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/13/11 11:10AM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/13/11 02:02PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/13/11 02:40PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/14/11 08:51AM
  Re: QT50 gearing/upgradesRe: Flagrant - Flagrant - 02/14/11 01:47PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/15/11 01:12AM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/15/11 08:57AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/15/11 01:54AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/15/11 11:09AM
  Re: QT50 gearing/upgradesRe: Toledo Riot Toledo Riot 02/15/11 12:09PM
  Re: QT50 gearing/upgradesRe: noke noke 02/15/11 03:56PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/15/11 04:23PM
  Re: QT50 gearing/upgradesRe: noke noke 02/15/11 05:02PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/15/11 08:04PM
  Re: QT50 gearing/upgradesRe: noke noke 02/15/11 10:33PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/15/11 11:03PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/15/11 11:33PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/16/11 03:01AM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 02/16/11 03:09AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/16/11 06:44AM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/16/11 09:46AM
  Re: QT50 gearing/upgradesRe: noke noke 02/16/11 12:10PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/16/11 01:58PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/16/11 02:15PM
  Re: QT50 gearing/upgradesRe: noke noke 02/16/11 02:34PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/16/11 05:15PM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/16/11 05:17PM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 02/17/11 03:17AM
  Re: QT50 gearing/upgradesRe: Dedic761 Dedic761 02/17/11 10:05AM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 02/18/11 02:55AM
  Re: QT50 gearing/upgradesRe: Dedic761 Dedic761 02/18/11 09:24AM
  Re: QT50 gearing/upgradesRe: schuwa1 schuwa1 02/20/11 04:12AM
  Re: QT50 gearing/upgradesRe: schuwa1 schuwa1 02/20/11 04:28AM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/20/11 08:41AM
  Re: QT50 gearing/upgradesRe: schuwa1 schuwa1 02/20/11 02:35PM
  Re: QT50 gearing/upgradesRe: jason jason 02/20/11 08:25PM
  Re: QT50 gearing/upgradesRe: schuwa1 schuwa1 02/21/11 12:21AM
  Re: QT50 gearing/upgradesRe: jason jason 02/20/11 08:32PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/21/11 10:44AM
  Re: QT50 gearing/upgradesRe: Dedic761 Dedic761 02/21/11 11:41AM
  Re: QT50 gearing/upgradesRe: shawn shawn 02/22/11 02:49PM
  Re: QT50 gearing/upgradesRe: Hoosier Dude (Moving Targets) Hoosier Dude (Moving Targets) 02/23/11 09:02AM
  Re: QT50 gearing/upgradesRe: jake jake 03/06/11 02:15AM
  Re: QT50 gearing/upgradesRe: Dedic761 Dedic761 02/23/11 10:28PM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 02/24/11 02:54AM
  Re: QT50 gearing/upgradesRe: noobSter noobSter 02/26/11 01:49AM
  Re: QT50 gearing/upgradesRe: ryan m ryan m 02/26/11 03:21AM
  Re: QT50 gearing/upgradesRe: noobSter noobSter 02/26/11 01:13PM
  Re: QT50 gearing/upgradesRe: BryAn eurism BryAn eurism 03/06/11 03:07AM
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