14 tooth sprocket question - SV650.org

mister c · 26-06-09, 02:07 PM

I have a 14 tooth Yamaha FZR400 front sprocket that is the same fitment as the SV & was wondering if it will be ok to fit it.
The Sprocket is narrower (Top sprocket in the 1st picture). Obviously made for a smaller chain.

But has the same size splines. I have tried it on the SV & it does fit.

Viney · 26-06-09, 02:11 PM

For the sake of £10 for a new one, i would get one that is for the bike/chain size. All i could think of is the narrower sprocket would wear the chain faster!

mister c · 26-06-09, 02:17 PM

That's what was going through my mind. I just had one lying around & thought I would give it a go.

embee · 26-06-09, 03:18 PM

Running a wider chain on a narrower sprocket is not a good idea. Don't do it on an SV. All sorts of wear/stress issues. Easy to get the right one.

I've done it before now, but only as a last resort (fitted a Triumph Tiger Cub engine with a 3/16" sprocket in a Rickman Micro Metisse with a 1/4" Rickman special rear wheel sprocket, and ran a 1/4" chain, ideally needed to fabricate a 1/4" engine sprocket but Cubs never had them as standard and it is a sprocket with a hub, not a flat plate so would need fabricating/welding and you have to split the engine cases completely to change the sprocket, just too much hassle for a small "toy" bike).

flymo · 26-06-09, 03:27 PM

Yeah, the main risk is that the chain is not properly supported and may come off the sprocket.

They arent expensive. Think I used B&C Express for my sprockets.

26-06-09, 02:07 PM	#1
mister c Member Mega Poster Join Date: Feb 2007 Location: Crewe, Cheshire Posts: 2,326	14 tooth sprocket question I have a 14 tooth Yamaha FZR400 front sprocket that is the same fitment as the SV & was wondering if it will be ok to fit it. The Sprocket is narrower (Top sprocket in the 1st picture). Obviously made for a smaller chain. But has the same size splines. I have tried it on the SV & it does fit. __________________ Flickr: http://www.flickr.com/photos/croozenooze/ Facebook : https://www.facebook.com/colin.hughes.1213?ref=tn_tnmn Yoo Toob https://www.youtube.com/channel/UCjG...eMWUx4Ud2dK-yA

26-06-09, 02:11 PM	#2
Viney Member Mega Poster Join Date: Jul 2003 Location: In the shadows to the left Posts: 7,700	Re: 14 tooth sprocket question For the sake of £10 for a new one, i would get one that is for the bike/chain size. All i could think of is the narrower sprocket would wear the chain faster!

26-06-09, 02:17 PM	#3
mister c Member Mega Poster Join Date: Feb 2007 Location: Crewe, Cheshire Posts: 2,326	Re: 14 tooth sprocket question That's what was going through my mind. I just had one lying around & thought I would give it a go. __________________ Flickr: http://www.flickr.com/photos/croozenooze/ Facebook : https://www.facebook.com/colin.hughes.1213?ref=tn_tnmn Yoo Toob https://www.youtube.com/channel/UCjG...eMWUx4Ud2dK-yA

26-06-09, 03:18 PM	#4
embee Member Mega Poster Join Date: Jul 2003 Location: Warwickshire Posts: 2,804	Re: 14 tooth sprocket question Running a wider chain on a narrower sprocket is not a good idea. Don't do it on an SV. All sorts of wear/stress issues. Easy to get the right one. I've done it before now, but only as a last resort (fitted a Triumph Tiger Cub engine with a 3/16" sprocket in a Rickman Micro Metisse with a 1/4" Rickman special rear wheel sprocket, and ran a 1/4" chain, ideally needed to fabricate a 1/4" engine sprocket but Cubs never had them as standard and it is a sprocket with a hub, not a flat plate so would need fabricating/welding and you have to split the engine cases completely to change the sprocket, just too much hassle for a small "toy" bike). __________________ "Artificial Intelligence is no match for natural stupidity"

26-06-09, 03:27 PM	#5
flymo Member Mega Poster Join Date: Jan 2008 Location: North West Posts: 3,124	Re: 14 tooth sprocket question Yeah, the main risk is that the chain is not properly supported and may come off the sprocket. They arent expensive. Think I used B&C Express for my sprockets.

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