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Old 02-07-2010, 10:50 PM   #120
RandyM
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Joined: Jun 2007
Location: Westminster, Ca
Oddometer: 894
I have a project to fix up a DR250s, so I'm keeping and eye on this thread for ideas.

Reguarding transmission gear swap, I have not done it. However it looks like the DR250S has a wider range than the other models.

Here are the transmission gear ratios according to the Clymer manual

Edit-> Only the 1990, 1991, and 1992 DR250S (Street) versions have the wide ratio transmission.











Gear RatioDr250Dr250sDr350Dr350s
1st29/12 (2.416)29/12 (2.416)29/12 (2.416)

29/12 (2.416)

2nd26/15 (1.733) 26/15 (1.733) 26/15 (1.733) 26/15 (1.733)
3rd24/18 (1.333) 23/18 (1.277) 24/18 (1.333)24/18 (1.333)
4th20/18 (1.111) 21/21 (1.000) 20/18 (1.111)20/18 (1.111)
5th20/21 (0.962) 19/23 (0.826) 20/21 (0.962) 20/21 (0.962)
6th19/23 (0.826) 17/24 (0.708) 19/23 (0.826) 19/23 (0.826)
Final Reduction49/13 (3.769) 48/13 (3.692) 47/14 (3.357) 43/14 (3.071)


Hopefully the formatting comes out right on everyones PC (or mac).
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RandyM

RandyM screwed with this post 05-14-2010 at 01:07 PM
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