FuelMoto 107 longevity for touring?
Tourer
Joined: Aug 2007
Posts: 404
Likes: 1
From: Northshore in Massachusetts
The S&S 106" cylinders are thicker than the 107" cylinders, the rev perf cylinders are the same jugs as stock the S&S jugs are thicker and have more and thicker cooling fins. just look at the area around the pushrod tubes on an assembled 106 vs a 107. I've seem several posts and a few used 107 jugs that were very scrored up inside from piston skirt to sleeve wear.
Road Captain
Joined: May 2009
Posts: 505
Likes: 2
I'm running a Fuel Moto 107" kit but I only put it on this spring. I've so far taken a 1700 mile trip to Scotland, a 750 mile trip to Wales and last weekend a 350 mile day to the South West. No problems. I understand that the 107" bore is basically the same as the max over-size Harley offer on the 103" pistons. So if the factory go that big I'd suggest it should be OK. That also means the 107" doesn't have any over-size options - but new/take-off barrels are cheap enough so....
The S&S 106" cylinders are thicker than the 107" cylinders, the rev perf cylinders are the same jugs as stock the S&S jugs are thicker and have more and thicker cooling fins. just look at the area around the pushrod tubes on an assembled 106 vs a 107. I've seem several posts and a few used 107 jugs that were very scrored up inside from piston skirt to sleeve wear.
__________________
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Road Master
Joined: Oct 2007
Posts: 1,231
Likes: 0
From: Nor-Kal
I wouldn't go from the 103 to a 107.. If you are going to do someting go to 113" or 120"... Pull the crank and have it done up by Hobans (Darkhorse) and increase the cubes significantly. Your 6-6 cams will work but you will be better off with the 555 or 777... Have Baisley or R&R or the like do your heads and you will have a 30% bump in power.
Advanced
Joined: Oct 2010
Posts: 92
Likes: 0
From: Suwanee, GA.
Rather than tell you what you should or shouldn't do with your ride, I'll answer your actual question.
I've got just under 10k on my FM 107 and have had zero issues. Still pulls like a train, two up, loaded down with gear. Obviously, that's not a large sampling of miles but I can only speak to that which I know.
I've got just under 10k on my FM 107 and have had zero issues. Still pulls like a train, two up, loaded down with gear. Obviously, that's not a large sampling of miles but I can only speak to that which I know.
I've got about 13,000 on my 107 overbore (not a FuelMoto) and I've experienced no problems. I did a 1400 mile trip over labor day. As far as the heat thing, it runs way cooler than a stocker. I'm not sure why, but it does.
Road Master
Joined: Sep 2006
Posts: 1,062
Likes: 4
From: Arizona
I am very happy with the Andrews 54 cams. The 54 and the Woods 555 are very, very similar, except the price. As far as the Cylinder Wall thickness thing goes, I havent read of any failures. When this engine is done, im sticking in a 120R. I think I have a long wait until that happens.
Last edited by Indianspringsaz; Sep 27, 2011 at 05:39 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
Road Warrior
Joined: Jan 2008
Posts: 1,995
Likes: 2
From: Land of 10,000 lakes
The cylinder wall thickness weighed into my decision on the 107 also. There are many guys running around with 100,000 miles on their stock motors without having rebored their jugs. I see no reason to expect any less from the 107 bore but they are at the maximum size so new jugs would be required. I only have about 5000 miles on mine so I'm thinking I'm good for another 18 or so years.
Ultimate HDF Member
Joined: Nov 2008
Posts: 6,682
Likes: 12
Im in the same boat as you. for a "daily driver" type build, I think the cast pistons are better. Ask me again tomorrow and I might change my mind though. Look at my "forged pistons vs cast" thread for reassureance though.