FXR extra large tank
Thread Starter
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Cruiser
Joined: Feb 2016
Posts: 105
Likes: 4
From: Rome, Italy
FXR extra large tank
Hello all, this is Maurizio from Rome, Italy.
My current ride is a 1991 FXR, but as I understand the FXR chassis is derived from the bigger gauge Touring chassis...
...may I bore you with my query
I'm putting all by "pipedreams" into one big bucket list and plan to ride around the world before I'm too old for that.
For this king of long range riding I am considering, among things, a bigger tank than the OEM 4 1/2 gal. tank.
I would the 6gal tank I understand is OEM to the Road King fit my FXR.
The reason for this is I consider it much more practical to have a bigger tank than to lug around a 1 gal. plastic reservoir...not to mention it may be prohibited in many places !
I am not considering the average highway in the continental US or Western Europe;
I am considering anywhere east of Poland... i.e. Russia, Kazakhstan, that odd 400 mile stretch in Siberia... or China...
...but also Morocco, Senegal, Zambia or even Chile and Argentina.
So... thoughts ? Personal experience ? Iron Butt riders ?
My current ride is a 1991 FXR, but as I understand the FXR chassis is derived from the bigger gauge Touring chassis...
...may I bore you with my query
I'm putting all by "pipedreams" into one big bucket list and plan to ride around the world before I'm too old for that.
For this king of long range riding I am considering, among things, a bigger tank than the OEM 4 1/2 gal. tank.
I would the 6gal tank I understand is OEM to the Road King fit my FXR.
The reason for this is I consider it much more practical to have a bigger tank than to lug around a 1 gal. plastic reservoir...not to mention it may be prohibited in many places !
I am not considering the average highway in the continental US or Western Europe;
I am considering anywhere east of Poland... i.e. Russia, Kazakhstan, that odd 400 mile stretch in Siberia... or China...
...but also Morocco, Senegal, Zambia or even Chile and Argentina.
So... thoughts ? Personal experience ? Iron Butt riders ?
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
the 6 gallon tank will fit on the fxr frame backbone ( which is NOT derived from the touring frame at all)
you will need to work on the mounts which is fairly easy and you may have to change your handlebars and adapter the bungs/petcock for your carb.
some might use a remote tank carried on teh rear of the bike
mike
you will need to work on the mounts which is fairly easy and you may have to change your handlebars and adapter the bungs/petcock for your carb.
some might use a remote tank carried on teh rear of the bike
mike
Road Master
Joined: May 2012
Posts: 769
Likes: 375
From: Bay Area
My brother has a large tank on his FXRS...it's do-able, took some custom fab work but it looks great, I think it's called the Fat Bob tank?. You might want to post this in the Evo Classics forum though.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
Yes, I think the above is the "quick-bob" mount kit which puts a softail type 2 x 2.5 gallon tank on a fxr (or sporty or...)
Possible to get oversize 3 gal tanks too
Possible to get oversize 3 gal tanks too
Thread Starter
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Cruiser
Joined: Feb 2016
Posts: 105
Likes: 4
From: Rome, Italy
the 6 gallon tank will fit on the fxr frame backbone ( which is NOT derived from the touring frame at all)
you will need to work on the mounts which is fairly easy and you may have to change your handlebars and adapter the bungs/petcock for your carb.
some might use a remote tank carried on teh rear of the bike
mike
you will need to work on the mounts which is fairly easy and you may have to change your handlebars and adapter the bungs/petcock for your carb.
some might use a remote tank carried on teh rear of the bike
mike
My sources read the FXR was derived from a frame inspired by the FL frame, but assembled in smaller (lighter) gauge tubing, mated to an XL front end.
Whereas I do agree the rear suspension of the FL and FXR are quite different, I am also aware that never has a Harley frame been praised so much as the FXR's.
For those who are of "Napoleonic" size, like me, the FXR is the Harley of choice for long range touring.
Reliable and dependable engine, gobs of power and torque (OK, with Stage 2 mods) and plenty of stability for those alpine twisties...
_
Road Master
Joined: May 2012
Posts: 769
Likes: 375
From: Bay Area
But there's little in common between the Eric Buell's FXR design and the Touring bikes.
Don't get me wrong, I love my Road King Classic, but FXRs are indeed special.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
I have a recent 6 gallon H-D Touring tank on my 1990 Glide. Forget all that stuff about how the FXR frame came about as it doesn't help solve your query!
The following is what I found, when installing my 'new' tank. The cutaways underneath the 6 gallon tank are a very different shape to my stock tank. Fortunately I have an S&S engine with an S&S carb, as I doubt if the tank will fit with a stock c/v carb, the S&S carb has a lower profile. There was no clearance for the stock engine steady, but thanks to my S&S carb I was able to remount mine lower, to clear the tank.
At the front, the tank fits the stock frame mounting points, but required spacers, as the tank mounts are wider apart than my frame. The tank is longer and I had to adapt the frame to provide suitable points to hold the rear down. The tank also sticks further forwards, reducing clearance between the forks and the tank.
The extra US gallon is actually a 6" cube, to give an idea of how much extra volume it takes up. H-D 'hide' this by making the tank longer, taller, reducing the cutaways underneath and forming the top of the tank into a gentle hump - it is no longer flat as with my stock tank. The seat will not fit without reshaping the nose, to match up against the 'new' tank.
I suspect you will find similar challenges with your FXR. I bought my 2009 RG tank on US Ebay, probably a showroom take-off by it's excellent condition, except it had a small dent, sorted out by my painter (he's also a panel beater). You will need a Pingel gas tap (or similar) plus adapter, as well as the top cover to seal the tank and provide a gas cap. None of your stock tank hardware will fit, due to the different shape of the new tank.
Hope that helps a little!
The following is what I found, when installing my 'new' tank. The cutaways underneath the 6 gallon tank are a very different shape to my stock tank. Fortunately I have an S&S engine with an S&S carb, as I doubt if the tank will fit with a stock c/v carb, the S&S carb has a lower profile. There was no clearance for the stock engine steady, but thanks to my S&S carb I was able to remount mine lower, to clear the tank.
At the front, the tank fits the stock frame mounting points, but required spacers, as the tank mounts are wider apart than my frame. The tank is longer and I had to adapt the frame to provide suitable points to hold the rear down. The tank also sticks further forwards, reducing clearance between the forks and the tank.
The extra US gallon is actually a 6" cube, to give an idea of how much extra volume it takes up. H-D 'hide' this by making the tank longer, taller, reducing the cutaways underneath and forming the top of the tank into a gentle hump - it is no longer flat as with my stock tank. The seat will not fit without reshaping the nose, to match up against the 'new' tank.
I suspect you will find similar challenges with your FXR. I bought my 2009 RG tank on US Ebay, probably a showroom take-off by it's excellent condition, except it had a small dent, sorted out by my painter (he's also a panel beater). You will need a Pingel gas tap (or similar) plus adapter, as well as the top cover to seal the tank and provide a gas cap. None of your stock tank hardware will fit, due to the different shape of the new tank.
Hope that helps a little!
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