Lifan LF200GY-5: 428 Chain Size Sprockets and 520 conversion

[Andi]

Hey Folks,

for your convenience I put together a Sprocket Cross Reference using the info I found on JT Sprockets web site and comparing it to the stock set up, as found on my Lifan LF200GY-5. As all the dimensions are given it will allow everybody to at least double check and compare to the set up on their bike(s).

Note: Please remember that the chain pitch on a 428 Chain is 0.5 inches (1/2") and on a 520 chain is 0.625 inches (5/8"). That means for every tooth you will gain 1/8" in circumference, at 17 teeth the added circumference would be 2 1/8" making the front sprocket diameter too large to fit under the cover.

Example:
428 Chain 17 teeth x 1/2" = 8.5" circ.
520 Chain 13 teeth x 5/8" = 8.125" circ. (should allow extra for the heavier chain). With the change in front teeth the rear sprocket will have to be adjusted as well, as indicated in some options below.

Furthermore I added the various Honda Models w/year, any of these sprockets can be found on, so you may even ask your local dealer for these sprockets based on Model and the desired number of teeth (if you don't want to purchase online).

JT Sprocket - http://www.jtsprockets.com/

428 Chain Size - Original set up for Lifan LF200GY-5:
Front & rear combo as found on 1974-1978 Honda XL125; 1978-1979 CM185/T; 1979-1983 Honda XL185/S; 1980-1982 CM200T Twinstar etc.

Front -17 Teeth x 428 Chain Size.

Front Sprocket available in: 12, 13, 14, 15, 16, 17 teeth
Stock Set-Up P/N: JTF259.17


Rear – 46 Teeth x 428 Chain Size.

Rear Sprocket available in: 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 56 teeth.
Stock Set-Up P/N: JTR269.46

Final Ratio = 2.7058




520 Chain Size - Complete Conversion Reference:

Front only, as found on 1981-2003 Honda XR200/R; 1983-1984Honda XL200/R; 1986-1987 Honda TLR200 Reflex.

Front sprocket available in: 12, 13, 14 teeth.


Rear only, as found on 1977 Honda XL175/K4; 1974-1976 Honda CB200/T; 1976-1979 Honda CB200.

Rear sprocket available in: 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42 teeth.

Stock Ratio Set-Up: Front Sprocket P/N JTF328.13 – Rear Sprocket P/N JTR279.35 = Ratio 35/13 = 2.6923
Highway Ratio Set-Up: Front Sprocket P/N JTF328.13 – Rear Sprocket P/N JTR279.33 = Ratio 33/13 = 2.5384
Even More?? Highway Ratio Set-Up: Front Sprocket P/N JTF328.13 – Rear Sprocket P/N JTR279.32 = Ratio 32/13 = 2.4615
Off Road Set-Up: Front Sprocket P/N JTF328.13 – Rear Sprocket P/N JTR279.38 = Ratio 38/13 = 2.9231 (equivalent to a 50/17 set up that some of the Chinese Dual Purpose come with, top speed will be quite limited though).

Well you get the picture.

I hope this helps, enjoy.

Andi

P.S. If anybody would like this summary as a PDF file, eMail me at johannesmell@yahoo.com and I will eMail the attachment to you.