Gearing

Payne34001 · Jul 14, 2014

I've seen a lot of recommendation to change gearing to 16-44?:dunno
Why is this recommended? What are the benefits compared to standard? And what is the standard on a 2003 mille?

RSV_Ecosse · Jul 14, 2014

17/42 stock.

16/42 is good.

16/44 is amazing.

Going down a tooth on the front and up 2 teeth on the back feels like you've bolted on another 20bhp, seriously. Do it, you will not look back I guarantee it. You will lose a small degree of top speed but who cares when the low speed punch is dramatically increased. For real world riding that's where you want the power anyway, top speed is academic on public roads.

Oh and I'll hoist the front wheel skywards at the mere sniff of the throttle in the first couple of gears.:thumbup

Payne34001 · Jul 16, 2014

Where is best to get these sprockets from? And can you get them in a kit with a chain?

butchersdog · Jul 16, 2014

Get em here Home - Aprilia Performance

RSV_Ecosse · Jul 17, 2014

I went for a Gold Renthal/Tsubaki 'X' ring chain combo. To be honest it doesn't matter what brand you go for as long as they are a reputable one. I got my local bike place to fit the front sprocket and chain as the front is a bit of a pig to remove sometimes. The back is fairly simple, just take the sprocket carrier/sprocket off the rear wheel, undo the nuts securing the sprocket to the carrier and replace the sprocket with the new one. There is however, a little trick you can do to ensure easy fitting which limits the amount of scrapes and dings you may get on yer knuckles. See below:-

Remove rear wheel
Pull sprocket away from wheel just enough to slip in a 19 mm open ended spanner (I think it's 19mm - it's been so long that I've forgotten) between the wheel and the sprocket carrier.
Make sure the hex bit of the sprocket fastener is located properly in the spanner jaws and then push the carrier back towards the wheel. This will "trap" the spanner and ensure that it doesn't slip on the hex bit.
Undo the corresponding 17mm nut using a socket or a ring spanner.
Repeat for the other fastners.

When re-fitting, use the same method but ensure you use 50Nm of torque.

There should be no need for a thread lock as the nuts are nylock jobbies anyway. Periodic checking is a good method to prevent them falling off.

Gearing

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