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Interesting power option......

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Old Dec 17, 2006 | 08:18 PM
  #1  
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Default Interesting power option......

I just got off the phone with my local indy shop owner. We were discussing primary gearing. First, let me say that 80-90% of my riding is on back roads, state highways and such. I very seldom hit the slab. Anyway, we were discussing primary gearing. The '03 to '06 have a higher primary gearing than the '02 and older bikes. He said, and agreed with Mr Bob Woods, that changing the primary gearing on a stage 1 88" to 3.37 would allow it to run side by side with a stock 103. Did I hear that right? A gear change and an 88 can keep up with a 103? YES. Only through 4th gear though. After that, the 103 will start pulling away slightly. WOW! How much cruising rpm will it cost you? He says 180 rpm at 70 mph. Not bad.

Scenario.....

One of the guys I ride with has an '02 Roadglide. 95" with unknown cams. He bought the bike used as it is. This bike has the most phenomenal accelleration of any "Mild" 95" I have ever ridden with. Why? It has the 3.37 primary gearing from the factory! This bike has over 50,000 miles on it and has always been one of the strongest bikes in the club.

So, in closing....

I think I am going to look into a primary gear change!


nogood o~`o
 
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Old Dec 17, 2006 | 08:25 PM
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Default RE: Interesting power option......

I have 3:37 primary gearing. It does accerate well. However, I am skeptical that a bone stock 88" with 3:37 will run side by side with a 103" with 3:15 gearing.

 
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Old Dec 17, 2006 | 08:31 PM
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Default RE: Interesting power option......

Me too, but thats 2 experienced builders that say it will. If anyone would know, I would think that the man behind Woods cams would. He does not make any of the parts for this upgrade, so he does not have a dog in the race.....


nogood o~`o
 
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Old Dec 17, 2006 | 08:41 PM
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Default RE: Interesting power option......

One way to find out for sure...hit the strip & shoot us a before & after 1/4 mile time![sm=biker.gif]

 
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Old Dec 17, 2006 | 09:20 PM
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Default RE: Interesting power option......

Lets suppose you do a lot of riding on the slab 70-90 mph, how would the 3.37 primary gears work for that???
 
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Old Dec 17, 2006 | 09:53 PM
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Default RE: Interesting power option......

Do you know what the gear change is? (example, change the front from a 31 to a 30 tooth, don't quote me on the tooth count)
 
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Old Dec 17, 2006 | 09:53 PM
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Default RE: Interesting power option......

Not sure about 90, but at 70, it's 180 rpm more. That would be roughly 3300 rpm instead of 3100 for me.


nogood o~`o
 
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Old Dec 17, 2006 | 09:54 PM
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Default RE: Interesting power option......


ORIGINAL: denispetit

Do you know what the gear change is? (example, change the front from a 31 to a 30 tooth, don't quote me on the tooth count)
No, not sure what the change is. But I know that they change the compensator sprocket and the clutch sprocket as well.


nogood o~`o
 
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Old Dec 17, 2006 | 10:03 PM
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Default RE: Interesting power option......

Just when I thought I was done...........you guys go and bring this up........LOL

I'm curious what's involved in the gear change, it sounds like a total disassembly of the primary and swapping out a bunch of stuff.......a lot of work.

So my '05 has 3.13 gearing?

It works well for me, and I think I'm leaving well-enough alone.

Steve
 
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Old Dec 17, 2006 | 10:07 PM
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Default RE: Interesting power option......


ORIGINAL: maineultraclassic

Just when I thought I was done...........you guys go and bring this up........LOL

I'm curious what's involved in the gear change, it sounds like a total disassembly of the primary and swapping out a bunch of stuff.......a lot of work.

So my '05 has 3.13 gearing?

It works well for me, and I think I'm leaving well-enough alone.

Steve
Steve, I am tellin ya....this is an awesome upgrade! I have been thinking about it for a long time, but no one put it like they did today. I knew it would improve acceleration, but never thought it would be THAT much. I'll go ahead and say it......when I get the money put back, IT'S A DONE DEAL!

nogood o~`o
 
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