What are people modding with medium size bikes?

[redpoint5]

Originally Posted by redyaris

Before the aero mods I could get as good as 67mpg at 53mph average speed and at 75mph average speed I would get 57mpg. after the aero mode I get 67mpg at 75mph and 71mpg at 63mph. At this stage I do not have a large enough sample size to be confident of my numbers. I am using the trend in my fuel log as my test, so until the number of entries gets to about 30 or so with a strong trend line I won't be sure. By some peoples standard this is not a very good test of aeromods, however my objective is fuel economy so this method works for my perposes.
On your cbr600 I would agree with you that a gearing change would help fuel economy. However you would have to accept a loss of acceleration and top speed in 6th gear. On my GS500F after the aeromods and gearing changes, one of the things I notice is I need less throatle to maintain speed on the highway at 75mph. The other thing I notice is that top gear acceleration is better than before the mods. These are subjective so a grain of salt is in order, until the sample size on my fuel log is large enough, and the average fuel consumption is better.

Your MPG increases sound substantial, and that is all I was wondering.

If there were a way to make only my 6th gear taller then that would be the optimal route. I don't use 6th gear on the track anyhow. It seems it's just too tall to be of any use on the track, and far too short for freeway cruising.

[redyaris]

repoint5 one of the nice things about most sport bikes is the availability of sprockets; in your case you could have a front sprocket for the track and an other bigger one for the road, that way you could get better mileage on the road. Kieth Code [a twist of the wrist...] recomends a practice drill called no bracks, to held develop judgement of corner entry speed that could be transfered to riding on the street for better milage. By driving on the road without using bracks you also develope race craft, the accurate judgement of speed relative to the conditions at hand.

[redpoint5]

Originally Posted by redyaris

repoint5 one of the nice things about most sport bikes is the availability of sprockets; in your case you could have a front sprocket for the track and an other bigger one for the road, that way you could get better mileage on the road. Kieth Code [a twist of the wrist...] recomends a practice drill called no bracks, to held develop judgement of corner entry speed that could be transfered to riding on the street for better milage. By driving on the road without using bracks you also develope race craft, the accurate judgement of speed relative to the conditions at hand.

I have considered the sprocket change, but I really do like the acceleration that is available with the current gearing, with the exception of 6th gear. Why don't car manufacturers just make a very tall "cruising" gear anyhow?

As for my street habits, I do not use brakes unless I am stopping. Rarely do I encounter a corner that I need to slow down for, as a posted 25mph corner can be executed at 55mph+.

Track practice improved my riding ability and confidence more than anything else.

[redyaris]

redpoint5 It sounds like the track you ride/race on has relatively short strats, so you can't get into 6th gear. You may still benifit on the track from a larger front sprocket if the track has slow corners on which you can't apply full throatle on the exit of a turn. You mit want to experament at the track with a bigger front sprocket to see how it affects your lap times. You could find that for some tracks the taller gearing reduces lap time...!