Gear ratio
 

I found out the gear ratio for my bike, I was wondering if it is close to what the rest of You have.... :?:

Transmission Ratio: 1st gear 2.759 2nd gear 1.882 3rd gear 1.400 4th gear 1.130 5th gear .960.

Kinda curious if mine is the same as the rest of the china bikes.

how did you found out?

I am always on the search for anyone else who rides or has one of these bikes. I found one of the old webpages that had these listed and it had extra info. :D

http://qjlehi.tripod.com/id10.html

Gear ratio for the Qingqi QM200GY (according to the English manual)

1st gear 3.000
2nd gear 1.933
3rd gear 1.438
4th gear 1.095
5th gear 0.913

Primary reduction ratio 3.158
Final reduction ratio 3.733

Qinggi has a bit wider ratio. I don't know what the lifan has.

Allen

So we have a differance already, I guess that throws the theory of these bikes all being the same out the window :lol: Now I wonder about the Roketas and Lifans.

I think that the same engines are produced by several factories, such as the 163 FML and 169 FML. Plus, these different 200cc engines are put into many GY bikes. Assume that Zongshen, Lifan, Shineray, Loncin, and a few others (Qingqi in Catastrophix's honor) create 200cc engines using the same general molds, but might have their own variations, as well as models, such as the 169 FML and 163 FML, and you have a near endless combination of bikes, but very similar in that they can interchange with each other. Roketa and Jetmoto, two US brands, probably piece together their bikes from others' parts, utililizing one of the bigger Chinese factory's excess manufacturing capacity. They can be considered a "manufacturer" for legal purposes, and would have to go through US certification for DOT. Jetmoto did, and their bikes are 49-state street legal, whereas Roketa is still up in the air as to registration. One of us really needs to go to China, with an interpreter, to get to the bottom of it. AZ200, you are luckier that you live in AZ as far as registration is concerned. If you have the bill of sale and the MCO, I would suggest that you visit an off-site MVD office who will plate your bike. Before Jetmoto got DOT certification, the Yuma MVD tried to make me jump through a few extra hoops to get a license plate, and I went to a place in Phoenix on the suggestion of an original member here named 'eddyfx.'

Well the previous owner of my bike had to dish out 200 bucks a couple weeks ago to get the bike title and other things squared away with it. As far as I know the hoops have been hopped :wink: , But I will let You know how that goes.

I was just very curious why some bikes on here seem to be besting my bike by at least ten to fifteen miles per hour or more. Which is why the gear ratio was pure gold when I found it.

I got a little off topic, but it has to do (mainly) with front and rear sprocket sizes. The Lifan LF200GY-5 is probably the best bike as far as the on- road and off-road mix is concerned. They are street geared with a 17 tooth front and 46 tooth rear sprocket. Your bike (count them to confirm), and the vast majority of the rest of us, have 14 tooth front and 56 tooth rear sprockets as stock, limiting our top speed to about 50, and at that speed, it sounds like the world, or at least the engine, is coming to an end. There were a couple members who had Roketas come stock with less teeth, but those guys seemed to be the exception, not the rule. Judging by the photos, a few of the premium Chinese bikes (i.e. the $2000+ models) seem to have better road gearing, such as UM, Zongshen (Sierra)/Qlink x-ranger, and Diamo, but these are premium bikes. The new Jetmoto enduro, if it is based on the Lifan GY-5, might have street gearing. Look around for the aftermarket rear sprockets that are compatible, and slap one on the rear wheel. Bruce (EJ Cycles) stocks the OEM 46 tooth rears that are stock on the Lifan GY-5.

already swapped out the sprocket for a 42, I have the old dinner plate for a sprocket sitting under my desk :lol: That's why I was suprised that I was not getting the same or similar top speeds as everyone else, And that my first gear was still utterly useless on the street..And second gear was not much better. This was the next logical search.....The transmissions.

You can see in this pic that the sprocket is quite small, And that my motor is the same as the Zongshens...plus i just cleaned my bike and want to show it off :lol:

http://aycu35.webshots.com/image/273...1004564_th.jpg
http://aycu15.webshots.com/image/246...2252964_th.jpg
http://aycu14.webshots.com/image/247...5370929_th.jpg
http://aycu27.webshots.com/image/261...4621663_th.jpg
Not dial up friendly if you select to view fullsize image on Webshots main page..Not bad if You just click the thumbnail.