Lowering Revs with sprockets

[taurus66]

Mind you, took the bike out this evening.. At 40 mph 2500rpm, 70mph 4750rpm,

[Lumpy]

Mind you, took the bike out this evening.. At 40 mph 2500rpm, 70mph 4750rpm,

far better than standard gearing, 120 tyre is far better too

[midden]

[quote author=Dead Eye link=topic=12414.msg138817#msg138817 date=1396517316]
80 MPH in 6th is approximately 6400 RPM, by going up one tooth on the front, this drops to 6000 RPM

That doesn't sound right, I've got standard gearing and 80 mph in 6th is nearly 7k rpm as ElkWorks says.
[/quote]
I was going to say nearer 6k for me, so I'll have to go out for a spin later to double check....

[Mick-H]

Might have a try of this +1 tooth on the 1000.

[ElkWorks]

So, I finally got round to doing this over the weekend, hurried up by the fact my front sprocket started cracking and falling to pieces!  :eek

+2F, -1R and new chain.

30mph - 2.1k(ish)
40mph - 3k
60mph - 4.5k
70mph-  5k

so theres approx. 1500-2000rpm drop in the revs at identical speeds to standard setup, and in all honesty it hasn't lost as much acceleration as I feared.

next test in two days is fuel consumption, on stock its averaging just over 60mpg.

I kind of wish id done this for donington now as I was so far up the rev range constantly to get the speed I needed, and the bike averaged 25mpg....



only in novice as my first track day in years, but did a 2.04 and beat a load of dedicated track bikes, including an R1 which I decided to gun for on the last session. he wasn't expecting me to come past on the brakes  :rollin (I say brakes, but due to my rear brake being seized, I was only using the front!  :lol)

[darrsi]

Nice work fella 

[clayt74]

Will be interesting to see how ya mpg is affected? I was surprised to find that with my standard gearing, riding solo commuting and keeping revs pretty low about 6 k, o would average 56 mpg. When riding 2 up and/or taking revs up to 11-12 k I actually average 64 mpg!!!
Needless to say I now rag it at every opportunity

[ElkWorks]

im interested too as this was the main reason behind doing it in the first place.

i'll be filling up in the morning so i'll keep you posted!

[ElkWorks]

well ive been averaging low to mid 60s recently after balancing the carbs.

new sprockets - filled up this morning - 73mpg.

well happy with that.

[dcurzon]

Thats impressive MPG!  What was the final tooth count that you fitted??

Stock, i'm getting 56mpg, with mostly London commuting.

[ElkWorks]

dunno, tbh

standard then +2F, -1R.

[ElkWorks]

todays mpg 68mpg, but there was a massive amount of stop start filtering the other night, and a spirited 30 miles or so, either way I aint gonna complain!