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Old Jan 8, 2013 | 01:07 PM
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Question Adding teeth

Hey all,

Wanted to know if anyone has lowered their RPM's with a larger front sprocket?

EG: http://883sportster.webs.com/products.htm

If you have installed this, I'm interested in your thoughts how it worked out.

Keep it on the rubber.
David
 
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Old Jan 8, 2013 | 04:12 PM
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On my '06 883/1200 conversion, I changed from the 28T to the 30T, it made a difference. Then I changed to the 1200 primary gearing. The combination put me right where I wanted my bike to be, much nicer on the highway. I now can cruise at around 3200 RPM, instead of the 4000RPM I was trying to cruise at with the 883 ratio. I lost a lot of that race around the city zippy-ness, though.

Each tooth on the sprocket is worth about 3 1/2% IIRC. So if you changed to a 30T from your 29T, your RPM would drop about 3.5%; if you change to a 32T it'd drop about 10%. AFAIK the 32T would require you to grind off some stuff, and may require you to change your belt too. And recalibrate your speedo.
 

Last edited by dwagar; Jan 8, 2013 at 04:14 PM.
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Old Jan 8, 2013 | 09:15 PM
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Originally Posted by DavidStiebel
Wanted to know if anyone has lowered their RPM's with a larger front sprocket?
I had the transmission pulley on my 07 XL1200L changed from 29T to 30T (Harley part # 40380-04). I wanted to lower the revs/vibration at freeway speeds, so for that purpose it works for me.
 
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Old Jan 8, 2013 | 10:27 PM
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So a 30T is a good overall sprocket to gain a lil more comfyness at higher speeds but not loose too much off the bottom? (Iron 883, stock motor no plans for 1200, no 2up)
 
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Old Jan 8, 2013 | 11:09 PM
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It will definitely help. I'll be going to a 30T most likely as well. Long tour rides were getting a bit numbing for me , even with better grips. Plus the engine noise will hopefully subside a bit so I can here myself slightly more lol. Maybe mileage will even improve slightly.
 
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Old Jan 9, 2013 | 09:13 AM
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Thanks y'all. I've been considering this in the overall evolution of my 883. I'll be watchin this thread.
 
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Old Jan 9, 2013 | 10:54 AM
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Looks like a good upgrade for highway riding. What is stock on the Irons? Stock on the 1200s?
 
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Old Jan 9, 2013 | 11:09 AM
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I've ordered the 30T sprocket for my 883C. Surdykes has them for ~$50.
 

Last edited by lo-rider; Jan 9, 2013 at 01:43 PM.
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