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Author Topic: More torque from my scooter  (Read 1236 times)

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Shorthair

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More torque from my scooter
« on: April 19, 2010, 02:57:11 PM »

Took a ride through the North Georgia and Western Carolina mountains with my bride on the back. Decided that I would like to have more torque to pull these hills. Have been told I need to change cams, throttle body, install direct drive gears and also port and polish the heads. My questions is does this sound right? Being a Screamin Eagle, is any of this stuff already done at the factory?

Any advise would be greatly appreciated.
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aka_Matt

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Re: More torque from my scooter
« Reply #1 on: April 19, 2010, 11:54:57 PM »

what year is the bike?? what motor does it have??
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grc

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Re: More torque from my scooter
« Reply #2 on: April 20, 2010, 01:47:31 PM »

Took a ride through the North Georgia and Western Carolina mountains with my bride on the back. Decided that I would like to have more torque to pull these hills. Have been told I need to change cams, throttle body, install direct drive gears and also port and polish the heads. My questions is does this sound right? Being a Screamin Eagle, is any of this stuff already done at the factory?

Any advise would be greatly appreciated.

The CVO bikes come with a larger than standard engine which does produce more torque, but it is still far from a high performance engine.  Yes, you could do all those things mentioned in your post, and if it is done properly and as part of a total package designed to work together, you can dramatically improve both the torque and horsepower.  The part they rarely tell you about, however, is that all those changes can dramatically impact reliability.  And it can add up to a large pile of cash in no time flat.

Before going nuts with a Stage IV build, you might want to look at a more modest build combined with a gear ratio change.  A simple change in gear ratio can make a huge difference.  If you still want to pursue engine changes, I'd recommend you find a good engine builder who will custom tailor a package to suit your riding style.  The last thing you want to do is just let someone at the dealership whip out the catalog and throw the biggest and baddest (and highest priced) parts at you.  The biggest throttle body, or the biggest cams, aren't necessarily what you want and in fact may result in a bike that's worse for your particular riding style.


Jerry
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Tom149

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Re: More torque from my scooter
« Reply #3 on: April 20, 2010, 04:53:44 PM »

The CVO bikes come with a larger than standard engine which does produce more torque, but it is still far from a high performance engine.  Yes, you could do all those things mentioned in your post, and if it is done properly and as part of a total package designed to work together, you can dramatically improve both the torque and horsepower.  The part they rarely tell you about, however, is that all those changes can dramatically impact reliability.  And it can add up to a large pile of cash in no time flat.

Before going nuts with a Stage IV build, you might want to look at a more modest build combined with a gear ratio change.  A simple change in gear ratio can make a huge difference.  If you still want to pursue engine changes, I'd recommend you find a good engine builder who will custom tailor a package to suit your riding style.  The last thing you want to do is just let someone at the dealership whip out the catalog and throw the biggest and baddest (and highest priced) parts at you.  The biggest throttle body, or the biggest cams, aren't necessarily what you want and in fact may result in a bike that's worse for your particular riding style.


Jerry

Great advice Jerry .....  :2vrolijk_21:

Tom

Gearing change (as Jerry suggested) and Stage 1 (High Flow AC & Pipes) and a good Dyno Tune may be all you need.  If not then you can still go on to other mods from there!

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Tom

Tom149

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Re: More torque from my scooter
« Reply #4 on: April 22, 2010, 11:01:53 AM »

Great advice Jerry .....  :2vrolijk_21:

Tom

Gearing change (as Jerry suggested) and Stage 1 (High Flow AC & Pipes) and a good Dyno Tune may be all you need.  If not then you can still go on to other mods from there!



My bad - looks like you already have a performance intake ....  :oops:

Tom
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Tom

cahdbiker

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Re: More torque from my scooter
« Reply #5 on: April 23, 2010, 07:45:27 AM »

Shorthair, Just my opinion, but don't let anyone talk you into too much compression, and keep your max torque down low. I have been down this road before and I feel as though as soon as someone is trying to sell me a lot of upgrades they are probably thinking about themselves more than what my needs are. Also, I don't know if it would cause any other issues, but if you decrease the front drive belt pulley 1 tooth  ( I did this on my 95 Heritage which has a S&S 107 and a six speed) you might be happy with everything else the way it is and not have to spend as much money. I did this on my 95 Heritage(really like comparaing apples and oranges to a SE Ultra) but the sprocket change put me in a sweet spot in overdrive at about 72 MPH plus it is quicker off the line. The Baker website has an RPM calculator which can help you out a lot with any gearing changes (you will need your rear tire diameter which you can get from the Dunlop web site). Just for the record I have an 09 SEUC with the Fulsac stage one set up, and non cat header. I am completely satisfied with it and nothing else is going to get changed unless it breaks. Good Luck CAHDBIKER
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2009 SEUC just south of Point Mugu Ventura County, Ca.
 

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