15T sprocket at 4500 miles? - Triumph Forum: Triumph Rat Motorcycle Forums
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Old 04-23-2017, 04:13 PM Thread Starter
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15T sprocket at 4500 miles?

Hey guys. Definitely not my first bike but my first Triumph and first post here. So far I love the bike (2014 Street Triple R). But I come from the land of sporty DOHC twins, and while a triple isn't gutless down low I do find myself wanting a bit more punch. So far my bike is 100% stock aside from engine sliders, brighter headlight bulbs, and the 1050 throttle tube. I'm interested in an exhaust but I figure a sprocket change will be the most effective. In the past I've always swapped my sprockets and chain together for obvious reasons. Right now my bike has about 4500 miles. Anyone have any experience with doing a sprocket change this early? I know there's a possibility of the new sprocket accelerating the wear on the chain. Just curious if anyone has attempted this before or should I wait until the chain needs replacing?
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Old 04-23-2017, 04:54 PM
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Swap it for the early version, they had more punch with the much lower 1st gear.

If you must alter the gearing, go up a couple on the back instead of dropping the front.
Check it out on this link:

http://www.gearingcommander.com/
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Old 04-23-2017, 05:06 PM Thread Starter
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Going down one tooth in the front is usually the same as going up three in the back though, figured it was more effective to swap the front (almost exact same effect with the least amount of change to the chain length).
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Old 04-23-2017, 05:17 PM
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You get less wear going up on rear.
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Old 04-23-2017, 09:40 PM
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My SV650S came with a 15 tooth front sprocket and the same 525 chain; dropping one from the 16 on the Street Triple shouldn't cause any abnormal wear. Whether you just change the front, or the whole shebang is up to you.

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Old 04-23-2017, 11:23 PM
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I went to a 15 front on my 2013, made a big difference down low. Wayyyyy more fun. Had more punch on the bottom for sure.


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Old 04-24-2017, 02:53 AM
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I wonder why Triumph upped that 1st gear ratio, most everybody who had the early model loved the hooligan element that low ratio gave it.

https://www.triumphrat.net/street-tri...on-14-a-4.html
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Old 04-24-2017, 11:59 AM
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I changed the front sprocket on my '13 when it had like 10K miles. Stupid me would occasionally stall it off the line before the swap. No stalls after the swap. And a bit quicker down low. The bike's now up to about 27K miles, (omg!) with the original chain, and no apparent wear on the sprockets.
It's such an easy and cheap modification, and easy to undo if you're not satisfied with it. It was about $15 for the sprocket from the dealer and took very little time. Go for it.

Last edited by gbinsd; 04-24-2017 at 12:02 PM. Reason: added details
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Old 04-24-2017, 12:23 PM
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Quote:
Originally Posted by Paul49 View Post
I wonder why Triumph upped that 1st gear ratio, most everybody who had the early model loved the hooligan element that low ratio gave it.

https://www.triumphrat.net/street-tri...on-14-a-4.html
If I remember correctly, their rationale was to improve "rideability" around town. I guess it makes 1st a little less snatchy and allows riders to delay the 1-2 shift a bit, if they want to.

Doesn't make much sense to me, either.

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Old 05-23-2017, 04:37 PM
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Quote:
Originally Posted by Trippin675 View Post
Hey guys. Definitely not my first bike but my first Triumph and first post here. So far I love the bike (2014 Street Triple R). But I come from the land of sporty DOHC twins, and while a triple isn't gutless down low I do find myself wanting a bit more punch. So far my bike is 100% stock aside from engine sliders, brighter headlight bulbs, and the 1050 throttle tube. I'm interested in an exhaust but I figure a sprocket change will be the most effective. In the past I've always swapped my sprockets and chain together for obvious reasons. Right now my bike has about 4500 miles. Anyone have any experience with doing a sprocket change this early? I know there's a possibility of the new sprocket accelerating the wear on the chain. Just curious if anyone has attempted this before or should I wait until the chain needs replacing?
Dropped a tooth on my supermoto and loved the affect it had on throttle response. I never noticed any accelerated wear on the chain prior to me selling it. I definitely plan on doing this to the Triumph.
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