Hi everyone i am relatively new to the site and wonder if anyone can help me on the subject of gearing. My new/used K5 wee strom is a little low geared in my estimation (110km at 5,000rpm) would like to know if anyone has geared up their bike and if so by how many teeth, front or rear ? and what is standard gearing combination ?
Would appreciate the feed back.
This subject has been discussed at great length. Try search. Bottom line, it depends on 1) how you use the bike and 2) your personal preferences.
The wee engine has plenty of mid-range torque and can easily pull higher gearing. It also revs easily and smoothly and can run comfortably all day at 6K+ rpms. It really only matters in 1st and 6th since all the ones in middle overlap anyhow.
I'm running a 16T sprocket on my '04 because I like the slightly more relaxed revs at highway speeds. Having come to the wee from a relatively slow-turning ST1100, it just feels more natural to me. Riders who come to the wee from cruisers will probably feel the same way. OTOH, those who come to the wee from an inline 4 or a small displacement twin will probably not be bothered by the busyness of the engine at all.
Theoretically, the bike should be capable of slightly better fuel mileage with the taller gear - that would depend on how the rider uses the throttle of course. FWIW, I can get high sixties (67-69 mpg) on 10% ethanol fuel if I work at it. I use 6th as an overdrive and usually ride in 5th in urban/suburban areas (i.e below about 55 mph). All else being equal, sprocket life should be slighter better with the larger sprockets since the wear is spread over a larger area. For the record changing to a larger sprocket will not increase the "top end" since the stock wee (mine anyhow) won't quite pull redline (10.5K rpm) in 5th much less 6th even with stock gearing.
If you rarely ride on high speed roads or if you ride 2-up you'll probably be happier with stock gearing. OTOH, if you spend a good deal of time 1-up at over-the-road speeds, you might like the taller gear better.