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downgrade front sproket

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Meshuggah
Scooby Slapper



Joined: 04 Feb 2010
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PostPosted: 19:18 - 16 May 2012    Post subject: downgrade front sproket Reply with quote
Hello everyone, searching the net I've found out that if you replace the standard front sprocket (16 teeth) with a 15 one the bike responsivness in the lower range should be much better. for my 2005 fz6 I've found this one https://www.ebay.co.uk/itm/290691282115?_trksid=p5197.c0.m619.
I would like to have your opinions about this.
will it be quite simple to replace the sprocket? I suppose just remove the old one and put in the new one.
Do I need to modify the chain anyhow?
is the brand of this sprocket renthal a good one?
does this mod affect the speedometer?
thanks again for your input.
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Triumph Tiger 800 2012
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Sload
World Chat Champion



Joined: 28 Aug 2011
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PostPosted: 19:37 - 16 May 2012    Post subject: Re: downgrade front sproket Reply with quote
Opeth wrote:
Hello everyone, searching the net I've found out that if you replace the standard front sprocket (16 teeth) with a 15 one the bike responsivness in the lower range should be much better. for my 2005 fz6 I've found this one https://www.ebay.co.uk/itm/290691282115?_trksid=p5197.c0.m619.
I would like to have your opinions about this.
will it be quite simple to replace the sprocket? I suppose just remove the old one and put in the new one.
Do I need to modify the chain anyhow?
is the brand of this sprocket renthal a good one?
does this mod affect the speedometer?
thanks again for your input.


Its down size or down tooth or down gear really, down grade would suggest you are fitting a lower quantity part.

It will adjust your gearing increasing your potential acceleration whilst reducing your top speed.

It should be a fairly easy task if you are ok with spanners. As to the chain, it will depend on how much adjustment you have. You are in effect taking out a links worth of circumference from the sprocket so you may need a smaller chain, I don't know specifically on your bike. If you are serious you may be able to get a suitable front and rear set with chain for your bike. If you are doing the front and chain you want to fit a new rear anyway. Just remember going down one on the front is about the same as going up 3 on the rear. Another consideration is by dropping the front sprocket you may cause the chain to foul on the swing arm or chain guard etc, you need to check this really.

As to the speedo, it will depend where your pickup is. Mine is on the front wheel so it has no effect for me personally.
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Sako
World Chat Champion



Joined: 19 Feb 2012
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PostPosted: 19:46 - 16 May 2012    Post subject: Reply with quote
it is much better to go up a few teeth on the REAR as opposed to dropping on the FRONT, the decreased/tightened radius on the front sprocket if dropped a tooth increases chain wear.
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 19:51 - 16 May 2012    Post subject: Reply with quote
It will give you better 'go' at the rear wheel throughout the gear.

However, you may find that say there were some situations where you were using second but now use third as the gearing is lower; now you've made it relatively slower for that situation.
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Sako
World Chat Champion



Joined: 19 Feb 2012
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PostPosted: 19:55 - 16 May 2012    Post subject: Reply with quote
G wrote:
It will give you better 'go' at the rear wheel throughout the gear.

However, you may find that say there were some situations where you were using second but now use third as the gearing is lower; now you've made it relatively slower for that situation.


perhaps the solution would be to fit a shimano moutainbike gear set to the bike then, effectively being able to adjust the rear sprocket size at any time, and being able to boast down the pub of having 21 gears - i know i'd be jealous.
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 20:04 - 16 May 2012    Post subject: Reply with quote
You do find a few bikes with a high and low range.
Had wondered about it for 'adventure' bikes like my 690, but in reality the new map meant the long first had plenty of go.

The ct110 'postie bike' is an example where you can swap to a low range so that you can still go up steep stuff despite the asthmatic engine.
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Taught2BCauti...
World Chat Champion



Joined: 12 Jan 2012
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PostPosted: 20:26 - 17 May 2012    Post subject: Reply with quote
My Varadero 125 has a 14 tooth front and a 44 tooth rear as standard. I use a 15 tooth front for longer journeys where I can maintain a good cruising speed with lower engine revs, and reach higher road speeds before the rev-limiter kicks in.

I also use a 13 tooth front for better acceleration around town and on journeys where steeper hills would be a problem for the 15 tooth - and where higher top speeds are not required.

I don't bother much with the 14 tooth, but the difference between 13 and 15 is quite noticeable!
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