Help Me Understand 30T Front Sprocket Change
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Road Captain
Joined: Nov 2009
Posts: 535
Likes: 3
From: Texas
Help Me Understand 30T Front Sprocket Change
I have a 2010 FLTRX that I'm going to install TW-555 cams in on Monday. I'm really interested in doing a 30T front sprocket as I can get the one from H-D for about 45$.
The questions I have are:
Does the belt need to be replaced? I have done tons of searches on the forum and some say it doesn't and some say it does.
What are my options for correcting the speedo? I have a SE Super Tune, will this work for that?
What are options for changing the primary chain sprockets for the same effect? What do they cost and who offers them? I have read in my searches that this route doesn't mess up your speedo.
Thanks guys!
The questions I have are:
Does the belt need to be replaced? I have done tons of searches on the forum and some say it doesn't and some say it does.
What are my options for correcting the speedo? I have a SE Super Tune, will this work for that?
What are options for changing the primary chain sprockets for the same effect? What do they cost and who offers them? I have read in my searches that this route doesn't mess up your speedo.
Thanks guys!
Elite HDF Member
Joined: Jun 2006
Posts: 3,698
Likes: 11
From: Longview, Washington
I have an Andrews 30T sprocket and shorter belt sitting on my bench. I was going to install the parts on my 07 RG. Traded it and I'm on the fence whether I'll do it on my new bike.
I bought a belt that is 2 teeth shorter.
A friend who did the same install to his RG told me to look at my adjuster to see how far back it was set. I was well over half way back so I knew there was no way I could adjust the stock belt enough.
I do know that pulling the swingarm is necessary to change the belt. I also know that your speedo will be off unless you use a TTS tuner to adjust it. (I have a TTS for my bike).
BTW, what do you know about gearing? I was surprised to find out that my 2011 is geared the same as my 2007 RG. I thought they dropped the gearing down after 2007????
Steve
I bought a belt that is 2 teeth shorter.
A friend who did the same install to his RG told me to look at my adjuster to see how far back it was set. I was well over half way back so I knew there was no way I could adjust the stock belt enough.
I do know that pulling the swingarm is necessary to change the belt. I also know that your speedo will be off unless you use a TTS tuner to adjust it. (I have a TTS for my bike).
BTW, what do you know about gearing? I was surprised to find out that my 2011 is geared the same as my 2007 RG. I thought they dropped the gearing down after 2007????
Steve
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Road Captain
Joined: Nov 2009
Posts: 535
Likes: 3
From: Texas
This is why I'm thinking maybe a primary sprocket change would be better. I really don't want to mess with having to recal the speedo.
EVO has two kits in bikers choice, the 30T sprocket and the 49T sprocket, trying to figure out the pros/cons of these two as I may just go that route instead of changing the belt pulley to 30T
EVO has two kits in bikers choice, the 30T sprocket and the 49T sprocket, trying to figure out the pros/cons of these two as I may just go that route instead of changing the belt pulley to 30T
Road Warrior
Joined: Jun 2007
Posts: 1,788
Likes: 4
From: Here
Having said that, I did the EVO 49T primary sprocket on my '07 and am very pleased with it. Never affected my cruise like some have reported on TBW bikes, but I did lose the 6th gear light until I got my TTS and changed the primary ratio. You can do this as well with a Thundermax (maybe other tuners as well, but I have personal experience with the TTS and Thundermax).
I decided on the 49T over the 30T engine sprocket to keep the compensator in place. I haven't heard of anyone having issues with removing the compensator, but I had just rather keep it in place. Also, the 30T will turn a few more RPM over the 49T.
Either option inside the primary is less labor than doing the 30T pulley change and there is no change to the speedometer accuracy (or inaccuracy depending on you point of view).
Last edited by 07RoadHawg; Oct 24, 2010 at 12:39 PM.
Thread Starter
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Road Captain
Joined: Nov 2009
Posts: 535
Likes: 3
From: Texas
I think, and could be wrong, that the gearing change applied to low gears and not the 6th gear so taking off from a stop would be better but you keep the same rpm in 6th on the highway.
Having said that, I did the EVO 49T primary sprocket on my '07 and am very pleased with it. Never affected my cruise like some have reported on TBW bikes, but I did lose the 6th gear light until I got my TTS and changed the primary ratio. You can do this as well with a Thundermax (maybe other tuners as well, but I have personal experience with the TTS and Thundermax).
I decided on the 49T over the 30T engine sprocket to keep the compensator in place. I haven't heard of anyone having issues with removing the compensator, but I had just rather keep it in place. Also, the 30T will turn a few more RPM over the 49T.
Either option inside the primary is less labor than doing the 30T pulley change and there is no change to the speedometer accuracy (or inaccuracy depending on you point of view).
Having said that, I did the EVO 49T primary sprocket on my '07 and am very pleased with it. Never affected my cruise like some have reported on TBW bikes, but I did lose the 6th gear light until I got my TTS and changed the primary ratio. You can do this as well with a Thundermax (maybe other tuners as well, but I have personal experience with the TTS and Thundermax).
I decided on the 49T over the 30T engine sprocket to keep the compensator in place. I haven't heard of anyone having issues with removing the compensator, but I had just rather keep it in place. Also, the 30T will turn a few more RPM over the 49T.
Either option inside the primary is less labor than doing the 30T pulley change and there is no change to the speedometer accuracy (or inaccuracy depending on you point of view).
I'm on the fence on which to do since there seems to be a huge difference in RPM between the 30T engine sprocket and the 49T Ring Gear.
How do these two compare to the 30T Belt pulley as far as performance? Is the 49T ring gear more comparable to the belt pulley and the 30T engine sprocket a step above them both?
This all has really crushed my hopes of a 45$ pulley change lol
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Road Captain
Joined: Nov 2009
Posts: 535
Likes: 3
From: Texas
Well guys I have no idea what I want to do. I don't want to do the crank pulley because I don't want to lose the compensator, I don't want the ring gear since I'm not crazy about drilling the clutch basket, and the trans pulley is a PITA because of the speedo.
I want the benefits of the mod but not the headaches
I want the benefits of the mod but not the headaches
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Road Captain
Joined: Dec 2008
Posts: 701
Likes: 5
This is why I'm thinking maybe a primary sprocket change would be better. I really don't want to mess with having to recal the speedo.
EVO has two kits in bikers choice, the 30T sprocket and the 49T sprocket, trying to figure out the pros/cons of these two as I may just go that route instead of changing the belt pulley to 30T
EVO has two kits in bikers choice, the 30T sprocket and the 49T sprocket, trying to figure out the pros/cons of these two as I may just go that route instead of changing the belt pulley to 30T
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Road Captain
Joined: Oct 2007
Posts: 673
Likes: 4
From: Charlotte NC
Trans output pulley
I did the 31 tooth pulley early on. This gave me 3 or 4 hundred more rpms on the low end. I was able to get into 6th a little earlier. I did not need to change my belt. My speedo was off anyway from the factory (factory spec is +3 - +5% deviation). I had a Sert on my bike at the time and TTS was offering an up grade for 100.00 to the TTS module. I did the upgrade and then did the re calibration and now my speedo is right on the money and my cruise and 6th gear indicator all work fine.
