Changing the front sprocket to one tooth smaller.
 

I have a new front sprocket with 14 spikes and I assume it is one tooth smaller than the original?

Do I need to cut the chain or will it go bolt-on?

Have You fitted one?
Is it better than the original ration for town and less than 120km/h speeds?
Does it give better acceleration?

1. MAy go straight on, depends on how far on the adjusters your current wheel position is, the rear will move back about 2cm.
2. Nope, not to an XT660
3.Better ?
4. Yes increased acceleration.

[quote=Rubu;127688]I have a new front sprocket with 14 spikes and I assume it is one tooth smaller than the original?

Do I need to cut the chain or will it go bolt-on? It will fit straight on, then adjust your chain.

Have You fitted one? Yes
Is it better than the original ration for town and less than 120km/h speeds? Yes, but your speedo will now over read, you need to fit a Speedo Healer to correct the speedo reading.
Does it give better acceleration? Yes much better.

I already find 1st gear quite short Kev, does 1st not feel a little ridiculous now?

How much effect on top end ?

I have tried most of the ratios, it all depends where & how you ride.

15/45
15/46
15/47
16/45
14/45

I prefer 15/46 using a Stage 3 air box & Carbon cans.

With the big bore & hot cam 15/47 was best.

Will the smaller sprocket put the chain to eat the swings rubber?

Where can i get a 16 tooth front sprocket?
I'll try 16/46 for longer distances.
At the moment im using 14/46 with 110 links.

greetz
xam

You can buy a 16T front sprocket from any Yamaha bike shop in Australia, they cost AUD$40.00 + 16.50 postage.

Thanks a lot.
Our bike equipment stores dont sell them and i never saw one on ebay.
Thought they dont exist at all.

;)

You can get them, I am lead to believe Renthal make a 16T front as well.

Send Worry Brother a PM as he might still have the I sent to him just before he sold his bike.

Yes Renthal do them,, i have a new 14 tooth renthal... its also the same sproket fur the Honda NX650.