Sprocket sizes

[trigger]

Without going outside to count, too cold, and not bothering to search for the info, Im too crap,
whats the standard size of the front and rear sprockets on a 2004 749s

I want to have a selection of ratios, so im looking at going two up on the back, and one down on the front, and all the combnations that that can offer.
Cheers

R

[Murray Mint]

14 Front / 38 Rear as Std. I've gone up two on the rear and it makes a difference... very nice. Don't go down on the front as this can place to much stress on the chain, also try doing a search on the site as this has been covered many time before.

Murray mint

[HW]

My 2003 749S was 14 front/39 rear. I went up 2 on the rear, as 14 is the minimum they recommend on the front before the chain starts to suffer. I beleive that was one of the differences between 749 and 749s, 749 has 15 on front (no idea about the rear).

Anyway, going up 2 on rear is like 1/2 a tooth on front, and it does make it a lot more lively. 14/41 now and the only problem is running out of top end a bit on the track. Nice an snappy out on the twisties though :D

[trigger]

Cheers for that, to be sure I will do a count, and check the front, as you say Henry, Im not overly comfortable with going down at the front due to chain lunching capabilities.
Murray, I will do a search, once ive lost my afternoon hangover feling.

R

[yellowisfriedegg]

Originally posted by trigger
to be sure I will do a count

why count teeth , the sprockets are stamped with the no ??:eureka:

[trigger]

Originally posted by yellowisfriedegg
Originally posted by trigger
to be sure I will do a count

why count teeth , the sprockets are stamped with the no ??:eureka:


Genius, there is always a simple answer, of course i knew that all along

[galaxy]

Don't worry about going down in the front...you can't. It comes with a 14 and no one makes a 13. Down one in front is equal to up 2 1/2 on the back, so I usually err on the side of acceleration and go three. I went up three on the SS and have no regrets. Gonna do the same on the 749. I wouldn't think up 2 on the 749 would be good enough given the rpm range of that motor. Just me though.

[posiden]

dont forget that you can only go so big on the back sprocket before the chain becomes to short and doesnt fit !!
I know this because I have a 40 tooth Rental sprocket that wont fit on my 749S with the standard chain - the sprockets only £25 but the chain is over £100.
Its for sale if you want it. Im going for the 39 tooth one.

[Carbon749]

The whole drop a tooth on the front tends to refer to the 9** bikes as these come with 15 tooth front sprocets and the 748 / 749 always came with 14 tooth as standard.

I know it's already been said, but, 749 go up 2 or 3 on the rear ...... new sprocket will be between £20 and £25.