Harley Davidson Forums banner

1 - 17 of 17 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter #1
Hi guys

I need some help. Im planing to change my stock tank to a sportster 48 tank. Since the street 750 fuel pump wont fit in the new tank i will use the 48 fuel pump.

Does anybody know if im gonna run into problems with that? Pressure issues? control issues?

Other suggestions how to get that done?

Appreciate your help!

cheers
mar
 

·
Registered
Joined
·
4 Posts
Discussion Starter #3
its a street 750, 2015 model. The EFI pump i want to use is from a sportster, 2007 and up.

Cant say for sure which sportster model it will come from since i will just check where can i find a used one which will fit the tank.

Do i need to look for a pump from a specific year?

Thanks John!
 

·
Wayward Son
Joined
·
23,499 Posts
Would think psi./delivery rate would be the most important factor.
 

·
Registered
Joined
·
4 Posts
Discussion Starter #6
The problem with the stock fuel pump is that I wont be able to fit it in the new tank.

Most likely the fuel pumps from the sportsters have a higher PSI / delivery rate. But i think higher pressure isnt the problem since there is a pressure valve which controls pressure / flow.

My main concern is if the boardcomputer will recognize the pump and is able to control it?
 

·
Wayward Son
Joined
·
23,499 Posts
You may be looking at a reflash.
If that is the case. Doubt you can do it as planned.
There is probably not a program available.
 

·
Retired citizen
Joined
·
23,654 Posts
EFI fuel pump assemblies don't have sensors, all the ECM does is turn them on and off.
I see a conflict arising with the instrument panel and fuel level signal.
I don't know off hand the pump specs between these model bikes but pump pressure needs to be high enough for the injectors to function. Fuel pressure regulators are non adjustable.
Also the Sportster tank tunnel needs to be wide enough to fit the Street's frame.
 

·
Registered
Joined
·
4 Posts
Discussion Starter #9
Thanks alot SCHMIDTY!

The tunnel of the tank im looking at will fit. Im gonna look for the specs of the pumps now and make sure the new one does at least have as much pressure as the street one.

If anyone is interested i can post the progress here!
 

·
Registered
Joined
·
3 Posts
Hi Mar,
Did you replace the tank? I was thinking of doing the same thing. Did you use the Sportster tank?

Hi guys

I need some help. Im planing to change my stock tank to a sportster 48 tank. Since the street 750 fuel pump wont fit in the new tank i will use the 48 fuel pump.

Does anybody know if im gonna run into problems with that? Pressure issues? control issues?

Other suggestions how to get that done?

Appreciate your help!

cheers
mar
 

·
Registered
Joined
·
5 Posts
@Three2beat Various companies have used efi sportster tanks & fuel pumps with no issue. I myself am hoping to do a swap as soon as this week, will let you know how it goes and include pictures if nobody else chimes in.
 

·
Registered
Joined
·
3 Posts
@DevanGrey yes please. Looking to change the tank as well and I found that a Sportster tank would do it. What year Sportster tank are you using?

@Three2beat Various companies have used efi sportster tanks & fuel pumps with no issue. I myself am hoping to do a swap as soon as this week, will let you know how it goes and include pictures if nobody else chimes in.
 

·
Registered
Joined
·
5 Posts
@DevanGrey yes please. Looking to change the tank as well and I found that a Sportster tank would do it. What year Sportster tank are you using?

Rather than the 883 or 48 models peanut tanks, I'm aiming at a 4.5 gal of of an XL1200c. My biggest concern is that the tank is going to be too long and will have spacing issues with the handlebar risers. I'm planning on routing the wiring harness through the center channel of the tank, as I already have it that way with the stock tank, the tank should have the clearance to rest on top of the spine of the frame and give the bike a "fuller" look
 

·
Registered
Joined
·
3 Posts
Please post pictures.
Rather than the 883 or 48 models peanut tanks, I'm aiming at a 4.5 gal of of an XL1200c. My biggest concern is that the tank is going to be too long and will have spacing issues with the handlebar risers. I'm planning on routing the wiring harness through the center channel of the tank, as I already have it that way with the stock tank, the tank should have the clearance to rest on top of the spine of the frame and give the bike a "fuller" look
 

·
Registered
Joined
·
5 Posts
@Three2beat

Tank came in today and fitted w/ temporary splicing and ran into a few minor problems, mainly mounting changes to the tanks brackets & handlebar risers fitment. I will say the wiring changes are simple, all that was needed was to connect the Sportster fuel pumps system relay wire (Y/grn) to the streets system relay (R/grn) and the solid black grounds to eachother respectively. Downsides, unless switching over to a Sportster guage cluster you will lose the low fuel light on your speedo & That's honestly about it.


Side note, unfortunately I was not able to attach video as the file sizes we're too large. And I dropped the tank off of the bike, ruining that perfect cherry red finish. Will be going to black soon enough.
 

Attachments

1 - 17 of 17 Posts
Top