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-   -   14 cog front sprocket ( https://www.xt660.com/showthread.php?t=623)

Aphex 10-08-06 15:32

14 cog front sprocket
 
Hi!
Have searched for a 14 cog front sprocket without any results. Have asked the biggest Yamaha dealers to small motorcycle shops and none have what I asked for to the XT :angry1: I know OTR have those but I don�t order just a sprocket from them. Has the wrf 450 for example the same splines? Or another Yamaha model perhaps?

CaptMoto 10-08-06 16:06

Quote:

Originally Posted by Aphex
Hi!
Have searched for a 14 cog front sprocket without any results. Have asked the biggest Yamaha dealers to small motorcycle shops and none have what I asked for to the XT :angry1: I know OTR have those but I don�t order just a sprocket from them. Has the wrf 450 for example the same splines? Or another Yamaha model perhaps?

Well why didn't you ask the Captn?? I know where you can get one, they are �8.99 before vat and postage, and you can get one at B&C Express follow this link, http://www.bandcexpress.co.uk/cgi-bi...OAD&nav=Yamaha

http://img.villagephotos.com/p/2005-1/930046/14cogs.JPG

Aphex 11-08-06 23:38

Damn! Yes, I should have ask you first before I called every dealer nearby. I will never learn. Luckily I found a sprocket at last, right here in good old Sweden. So now I can calm down and start focus on better things in my life :glasses13:

Regards
Mattias

afk40 09-12-06 02:14

What is the standard teeth on both sprockets...an did ye notice any different wi a 14 tooth front...I take it this is smaller than the standard...Mabozzar

CaptMoto 09-12-06 02:32

1 Attachment(s)
Standard sprockets are: front 15 teeth / rear 45
By changing the front sprocked to a 14 teeth your bike will gain a quicker acceleration however the moment you mess up with sprockets your speedo will give unaccurate readings, hence you might want to be careful when going past a gatso. To compensate for that you could fit a speedo healer but it has to be calibrated by someone who has a rolling machine and instruments to measure it. Personally I wouldn't bother with it, too much hassle.

If you want to learn more of the effects that a change in sprockets will do to your bike try and experiment with the attached spreadsheet.

Storm 16-01-07 22:33

Right, very blond question from me... I'm contempating changing the gearing for better acceleration (I don't need to go any quicker than 100mph anyway, and I want proper 2nd gear power wheelies!).

Which is the best option - Smaller front sprocket, or larger rear?

What will this do to my speedo - will it show 30 if I'm doing 25 or the other way around (that's the blond bit!)?

Storm

CaptMoto 16-01-07 22:45

on your head be it young skywalker, all I know the speedo reading will be affected, one way or another you could be doing 50 and the speedo might say 40 and then the gatzos will get ya!

did u check out the excel sheet with the various difference in speed and revs by changing sprockets? here it is attached

Storm 16-01-07 23:06

Thats a really useful spreadsheet - thanks Fran.

strat 16-01-07 23:20

I put a 14 tooth front sprocket on my XT660X ages ago, and it smooths out snatchiness loads as the bike seems to be in the correct gear more often, Yamaha certainly got the final drive ratio too tall on this bike.
As for the speedo accuracy I thought it now over-reads rather than under-reads so 32mph indicated is 30 actual and 64mph was 60 actual speed.
But I could be wrong :spanking[1]: I can't remember how I worked it out now!

cheers, strat.

CaptMoto 16-01-07 23:39

Quote:

Originally Posted by Storm
Thats a really useful spreadsheet - thanks Fran.

No problems, I hope it will help you making your mind about it.

Buck 16-01-07 23:53

Quote:

Originally Posted by Aphex
Hi!
Have searched for a 14 cog front sprocket without any results. Have asked the biggest Yamaha dealers to small motorcycle shops and none have what I asked for to the XT :angry1: I know OTR have those but I don�t order just a sprocket from them. Has the wrf 450 for example the same splines? Or another Yamaha model perhaps?

Try these.www.shop.wemoto.com/index.dyn?oid=5834319

afk40 17-01-07 02:45

6 Attachment(s)
Storm, the 14 tooth front...... I have on many occasion went down a tooth on the front sprocket.... if you go down on the front...YES it will give you more acceleration... enabling you to hoist the front much easier, an although you have more acce;eration... that doesnt mean the bike will go any faster... if in the NOW mode, it does 100 flat out....a had 97 the day but run out o road...anyway... wi a 14 tooth it`ll cut your top end by about 5mph7 tops.... a wid personaly give that wee bit up fur more lifting power... but dont be expecting power wheelies... even wi ma XJR13 a power wheelie was ok in 1st gear but it was near the end of its revs in second before it started tae lift... ye still need tae half clutch ...I tried it today wi only 200 miles on the engine, its really not slackened of enough yet tae be doin big wheelies... as when it slackens off maybe around the 1000 mile mark... then a`ll notice differences... a tried it a wee bit in first off the throttle only... an its too fierce..actually uncontrolable if given too much of a handful... then a tried it in second wi half clutchin an a fair amount of revs... an it started tae lift, but the road conditions werent great... but tae cut tae the chase.... yes am Gonna fit a front 14 tooth...cause a dont need the top end.... if yer lookin fur real speed buy an xjr... its the fun low down an mid range wit its all about on these fun trailies.....IF ye had tae go up on the back... ye wid need tae compensate around 3 teeth tae one on the front.... so if ye went up 3 teeth that wid make it slower on the pick away but more torque.... ave experimented once wi a XLR250... an went up the sprocks as a was lookin fur a kinda TRIALS bike torque... an man did a get it... a had a sprocket made a think 47 was standard an this was about 65 or so....whit a difference... it would run in top gear at around 15 mph.... thats how low down a could go... an ma top end which used to be about 80 went down to about 45.... but the torque was there.... so if a wis you leave the rear alone....ye can even go tae a 13... but that slows ye down top end 15 mph... an ye dont want that...ave tried it....a 14 is a good compromise....a had standard gearin on ma Dommie... an commin off a roundabout jist exiting it ad sometimes get a wee lift in 3rd wi a bit o clutch but in 2nd wi a bit o clutch it wid be reachin fur the sky nae bother....also ave had problems liftin a KLR650 with a pipe on it.. it will lift, but not easy,,, but wi a 14 tooth it makes life easier.....so a think now ye know whit ye need tae do....an mind tighten yer chain a wee bit....a havent read that attachment above yet but will after a post this....mabozzar....:023: an mind dont be goin daft or yell end up wi something like this....the end 4 pics

afk40 17-01-07 02:48

1 Attachment(s)
another one ye get when yer foolin wheelin....

Storm 17-01-07 10:24

Excellent, Thanks John - that's really helpful.


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