88 to big bore
Road Warrior
Joined: Apr 2016
Posts: 1,399
Likes: 307
From: Salem IN
From S&S web site
510: Designed as a bolt-in cam for 88, 95, and 96 CID engines with compression ratios below 9.7:1, it is primarily intended for use with stock, un-ported heads. 3000-5500 rpm. Bolt-in overall.
510: Designed as a bolt-in cam for 88, 95, and 96 CID engines with compression ratios below 9.7:1, it is primarily intended for use with stock, un-ported heads. 3000-5500 rpm. Bolt-in overall.
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,168
From: SE Michigan
Yes, that was my point - if you're going to all that trouble and expense to up the displacement, why keep stock heads?
Stellar HDF Member
Joined: Jun 2018
Posts: 2,235
Likes: 1,210
From: AZ
yes I read that too. The 09 Ultra Classic I purchased had been upgraded from 96 cubic inch to 103 cubic inch but still listed 510g cams... a builder I spoke with said there's nothing wrong with that but he would have used gosh I can't remember 551 or 570 cams perhaps? And my bike runs great I just wonder how much better it would be with the proper cams
Road Warrior
Joined: Apr 2016
Posts: 1,399
Likes: 307
From: Salem IN
I have andrews 37G in mine, close to a 510...I like em!
But I always go stare at....
https://www.sscycle.com/products/t11...-585-gpe-cams/
But I always go stare at....
https://www.sscycle.com/products/t11...-585-gpe-cams/
Ultimate HDF Member
Joined: Mar 2012
Posts: 6,129
Likes: 143
From: Santa Cruz
Your current/original cylinders can easily be bored to 95/98 inches. There are also 103 drop in cylinders. You can keep your current cams with the proper pistons and you will feel the difference. But of course proper headwork, matching cams and a proper tune will seriously wake it up. Just depends what ya want and how deep your pockets are.
Last edited by 0ldhippie; Nov 7, 2018 at 10:34 PM.
Elite HDF Member
Joined: Jul 2007
Posts: 3,903
Likes: 1,122
From: 48.067222,12.863611
OP-
No reason you can't do what you want with the motor. Just realize it's a 15 year old bike and can be finicky. It just takes a bit more love.
I have a 2003 RKC that is 107" 4" stroke and 4.125" barrels. I had it rebuilt in 2014 when it had 85K on the factory 95". It was good to me, but started to use a bit of oil. The plan was to do the top end and punch it to 98" with new heads. Plans changed. The bottom end needed to be addressed due to connecting rods. At that point, I decided to go 107. Hindsight, I should just gone 124".
I chose to have the crank trued, plugged and welded though, despite the builder assuring me the 2003 crank was still pretty good. And mine was within spec. I wanted piece of mind.
Anyway..... long story short, I'd go with a mild 98" build with some heads (1.9 intake and 1.575 exhaust) and a cam to match. Keep your CCP around 195 and get a good tune. You'll be happy.
No reason you can't do what you want with the motor. Just realize it's a 15 year old bike and can be finicky. It just takes a bit more love.
I have a 2003 RKC that is 107" 4" stroke and 4.125" barrels. I had it rebuilt in 2014 when it had 85K on the factory 95". It was good to me, but started to use a bit of oil. The plan was to do the top end and punch it to 98" with new heads. Plans changed. The bottom end needed to be addressed due to connecting rods. At that point, I decided to go 107. Hindsight, I should just gone 124".
I chose to have the crank trued, plugged and welded though, despite the builder assuring me the 2003 crank was still pretty good. And mine was within spec. I wanted piece of mind.
Anyway..... long story short, I'd go with a mild 98" build with some heads (1.9 intake and 1.575 exhaust) and a cam to match. Keep your CCP around 195 and get a good tune. You'll be happy.
Road Captain
Joined: Feb 2006
Posts: 604
Likes: 64
From:
Don't forget the Swing arm bushings, breaks, wheel bearings, motor mount, clutch, cables, seat, stereo, etc. etc. etc. All things on an old bike that need to be changed and updated. When you're done what will you have? A new old bike built the way you want (performance, comfort, and reliably). What Ill tell you is you won't recover your investment in $$$ but in pure FUN many times over.
Yep, my 2005 Ultra, New motor and all the above + lots more STUFF.
KenK
Yep, my 2005 Ultra, New motor and all the above + lots more STUFF.
KenK
Thread Starter
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Road Warrior
Joined: Sep 2007
Posts: 1,252
Likes: 142
A lot of good advice here, and it guess the main consensus is the deeper the pockets the more you get. Seriously, I was considering droping larger cylinders and pistons in it but that was about it. After all its a touring bike and those kits weren't all that much when I looked a while back. Don't get me wrong, im happy with the power this bike as as it is, but was looking for something to do on a weekend when there are snowdrifts at my door, and if a simple upgrade like what was worth the effort. I guess im going to have to plan a budget, a goal and see what I come up with. Thanks again.
randy
randy
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Seasoned HDF Member
Joined: Apr 2018
Posts: 5,945
Likes: 5,140
From: Louisiana
When I bought my 2002 RKC, It had already been upgraded with new jugs, pistons, cams and Vance Hines exhaust and a tune for the FI. The guy I bought it from told me it had been upgraded to a 95 CI? He couldn't remember for sure.
But, it runs like a scalded dog, sounds great and is a lot of fun to ride.
But, it runs like a scalded dog, sounds great and is a lot of fun to ride.
Last edited by Down South; Nov 8, 2018 at 09:04 AM.
Seasoned HDF Member
Joined: Feb 2016
Posts: 8,001
Likes: 6,901
From: NC
I'd be leery about going big bore because of cooling.
But, flowing your stock heads, matching cams to selected pistons, matching the injectors to the new flow, and remap and you will be amazed.
'Fast' and 'Harley' should not be used in the same sentence. The same for motor Guzi. Both are motors the back in the 60s and 70s were something. Today, they are glorified ditch pumps.
I enjoy an optimized Harley for touring. But if I want fast, it is not a Harley or Moto Guzzi. I've even been told by a few Harley 'loyalist' that my 2002 is unreliable, unsafe and no longer suitable for touring.
But, flowing your stock heads, matching cams to selected pistons, matching the injectors to the new flow, and remap and you will be amazed.
'Fast' and 'Harley' should not be used in the same sentence. The same for motor Guzi. Both are motors the back in the 60s and 70s were something. Today, they are glorified ditch pumps.
I enjoy an optimized Harley for touring. But if I want fast, it is not a Harley or Moto Guzzi. I've even been told by a few Harley 'loyalist' that my 2002 is unreliable, unsafe and no longer suitable for touring.