Loncin GN250

TU250X 249cc 14KW @7500 rpm
Single cylinder 2-valve EFI
Legal in 49 States


GZ250 249cc 14.7KW @8000 rpm
Single cylinder 4-valve Carbureted
Legal in 50 States

I think that is interesting that the carbureted GZ250 can meet CARB and the EFI TU250X does not.

I am not a GZ250 fan, but I am now considering it for modification since it seems to have a good engine.
I wonder if I could customize it, they sell for $2,999.00 brand new, even less used.

Others seem to have done just that….


http://farm4.static.flickr.com/3285/...9aed3da0ec.jpg


http://farm4.static.flickr.com/3251/...28e7158089.jpg

You never catch me wearing those goggles….

here is image of the GZ250 engine and you can see around the decorative cover.
http://image.motorcyclecruiser.com/f..._view.jpeg.jpg

http://i2kdave.files.wordpress.com/2...pg?w=528&h=397

how to adjust valves on a GZ250....see the bolt its an adjustment bolt for the Y shaped rocker arm that has two valves attached to it.

GZ250 head
http://i784.photobucket.com/albums/y...i/untitled.jpg

http://i784.photobucket.com/albums/y.../untitled2.jpg

Look at this little custom with a 125cc...

http://i784.photobucket.com/albums/y...photovd019.jpg

here is a mock up
http://i784.photobucket.com/albums/y...cafemockup.jpg

another version of the GN250
http://i784.photobucket.com/albums/y...i/vol001_0.jpg

http://i784.photobucket.com/albums/y...rjod201165.jpg

There seems to be two different engines one is a 2-valve and the other a 4-valve and the twin exhaust port seems to go along with that. Close examination of the engine head shows either the access cover (4-valve) or a single tappet bolt (2-valve). 2-valve with single exhaust port http://i784.photobucket.com/albums/y...i/top_img2.jpg 4-valve with two exhaust ports http://i784.photobucket.com/albums/y...009tr250-5.jpg

I just wonder if Wonjan cannot sell its GN250 in china or the 250GY either then will they be discontinued or only exported.

I left these small and they are click-able to view in full size…also they can be zoomed into.

WJ250GY
http://i784.photobucket.com/albums/y...jan/th_250.jpg

GN250
http://i784.photobucket.com/albums/y...ser-GN250-.jpg

If they could be had for cheap they would make good bikes to customize, lowering the front on them and raising the rear and then cleaning them up? Wonjan says they do not sell the engine only that it can only be purchased on one of their models. You just know that there is no way Suzuki would allow anyone to sell that GN250 with its name on it…not unless they are distributing them.

After seeing what Ryca did with the SV40...it makes me wonder why somebody does not set up a more elaborate system of customization? Then why not through a bigger network like Suzuki of America?

Stock bikes sitting next to custom versions of them, with kits or individual parts for sale and even the option to have them do the conversion for you and even to your used model?

I wonder what a unit price on these is out of the factory?

http://www.wbengston.com/gl1800/GN250Ad.jpghttp://http://www.wbengston.com/gl1800/GN250Ad.jpg