Hey Jim,
 
 To reply, I ordered for my bike a 14T front and 45T rear steel 
 sprocket, I have not installed them as of yet, (winter set in) 
 however I do expect the smaller front to give me the extra 
 power/slower speed in 1st gear.  My first thoughts were they shoulda 
 used a 6 speed box or 5 speed set more like a Trial tranny, first 
 gear is WAY too high for any serious offroad excursions.
 
 To me offroad is just that, no road, no trail, no excuse.
 
 As for the rear sprocket, 1 extra tooth should really make no effect 
 compaired to the 1 tooth in the front, however I mostly wanted 
 the "Hot Slots" which are grooves at the base of the teeth, that 
 allow mud to squeeze out when in the heavy stuff, instead of packing 
 into the chain.  Figured with simple thoughts loose a tooth in the 
 front add one in the back and chain should stay basically some length 
 right ? ( Here where the link counters and experts pipe in )
 
 
 
http://www.sprocketspecialists.com  Is where I got them from, prices 
 are fair IMHO,  by far the front sprocket will make a big difference 
 to me, this I know.  I do expect to loose MPG to drop, and top end to 
 drop, but to me top end is way more than I need as it is.
 Front sprockets are cheap at $12.99, so its not like an expensive 
 change, can always put the orginal back on. Oh they included a cool 
 Sprocket Specialist Sticker with the rear sprocket.
 
 You can use "Gear-Calc" to run the numbers, the un-registered version 
 you have to manually punch all the gearing into, but shows the 
 different speeds in each gear when changing sprocket sizes. If I was 
 serious about the gearing I would register the software, since you 
 can import the settings file for the bike and save changes its nice 
 same as Shim-Calc, but I was just tinkering.
 
 Why else do we buy a  --- In DSN_klr650@y..., "jim7j7"  wrote:
 > I was wondering if anyone has changed the sprockets on their bikes 
 to 
 > gear them down for better off-road performance?  What parts were 
 used 
 > and how the performace changed?
 > 
 > Jim
 > A16