Gearing question

[P.]

So, I was looking at getting some additional sprockets for the TT600R.

Mainly because today I hit the limiter in 5th up a hill.

I use the bike to commute down 20 miles of motorway and it revs fairly high, think its about 7k redline? If the gearing could be changed so it sits at a comfy 75 on the motorway (no speedo so estimation) I would be happy.

Currently its sitting on 17 inch sumo wheels so using gearing commander I should be hitting around 93mph at 6500rpm on the current gearing.

I'm happy to buy both a -1 and +1 tooth front sprocket and go for a -3 rear and a +4 rear.

Mainly because I can then switch for fun and road riding. Sound sensible? Not sensible as such but...would it work?

[Pie-Roe]

Buy another bike to commute on.

like an rf600 in fact

It will work but it wont be ideal. swapping over front and rears each time would be dull. What type of bolt is it on the front? If it was two 10mil bolts or a circlip wouldn't be too bad.
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[P.]

No idea Its some form of bolt

I kow it might get boring but its simply doing the front for now...just to see if I can get lower rpm at long cruising speeds.

[iooi]

Check this site out to see just what effect the changes will have.
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Just because my bike was A DIVVY, does not mean i am......

[tahrey]

So, what... have three sets - your current setup, a +1F/-3R for top speed and cruising, and -1F/+4R for maximum attack riding?

I guess you already worked it out, but the changes you'll see will be dependent on the current setup, what gearing do you have at the moment? Got any kind of GPS log or the like to see what speed you're actually doing both flat-out on the limiter and at a "comfortable" rpm?

(What's the point in changing it to do an easy 75, if you're already doing that anyway? If the redline isn't til 7000 (and therefore limiter at 7500?), and 6500 = 93mph, that's not topping out til 100~107mph, and 75mph is at a relatively easy 5250 already. Not the easiEST, but hardly thrashing it. If 6500 is your peak power, it's equivalent to cruising at 4200 in a small car... a bit buzzy but nothing too unusual, about what I'd pull at 85 in my last one)

Don't forget you may need different chains to go with, or at least some extra links and a cutter/riveter.

Or you could do +1/-1 ... or +2/-2 (and -1/+1, -2/+2)...

[P.]