Yamaha TW200 2006

 I'm looking at changing my rear sprocket to increase my road speed and
decrease engine rev at highway speeds. I currently have a 428 chain with
a 50 tooth sprocket. I am looking at a 428/40 sprocket. What speed
change can I expect with 10 less teeth on the rear? Will there be a
noticeable change or should I go to a 30 tooth sprocket? Anybody tried this?







--
Bcrawford

 
Planning any aero mods? Engine mods?

It may well slow you down. It'll surely hurt it's speed on long uphill
grades.
The engine likely doesn't have the HP to push the bike through the air
any faster than it already can.

--
Rayvan

 On Tue, 17 Apr 2007 18:29:07 GMT, Mike G


I did similar with a DT175 -- except I changed the front sprocket.
With fewer teeth than the rear I could get the the gearing I wanted
without swapping out the chain -- just adjust the rear wheel
back/forth a little.  As the gearing, it's a straight ratio of old and
new.  A 50:40 change in rear sprocket will give you a 40:50 change in
speed.

If you top out at 60 now, and want to do 70, you'll want a (50*60/70)
43 tooth rear sprocket.  A 40 tooth sprocket might take you to 75 mph.
Might because of wind resistance.  The power needed to shove aside the
air increases with the square of the speed.  For the 25% speed
increase from 60 mph to 75 mph you need 56% more power.


On something like the TW200, yes it will -- his speed is presently
limited by power rolling off past peak power.   I had a DT175 with the
compromise factory sprockets.  I picked up a pair of  countershaft
sprockets that had more and less teeth than stock.  My dirt sprocket
gave a top end of 45 mph, but would crawl anything; while the street
sprocket gave a top speed of over 65 mph -- barely enough for surface
streets in Los Angeles.
.  

 On Apr 17, 2:16 pm, ls650{modelna...@sbcglobal.net (Paladin) wrote:


It's likely limited by air. It's got these HUGE fat tires on it.
Your old DT175 had a two stroke engine that put out a fair
bit more HP than the four stroke TW200 does as well..
--
Rayvan

 "Broderick Crawford" <> wrote in message > I'm looking at changing my rear
sprocket to increase my road speed and> decrease engine rev at highway
speeds.


TW200 and highway speeds???  Easy fix.  Get a different bike.
It can do 55-65 if you can stand the wind and buffeting but it likes the
backroads and trails much more.  It's not crazy about soft sand, though...
Sue
Minocqua, WI
Yamaha '00 VStar 650
              '04 TW200 (mud = fun)
Kawasaki '95 Vulcan 1500  V#15937

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