Main Menu
|
|
Active Threads
|
Hi
Last Post: Veeflys
Posted On: 1 Hour Ago
Replies: 18
Views: 589
....1
Last Post: Graywolf
Posted On: 5 Hours Ago
Replies: 6,025
Views: 357,048
|
|
Members Birthdays
|
|
4th March 2021
|
|
Master Custom Bike Builder
|
|
Join Date: Sep 2010
Posts: 3,485 Sportster/Buell Model: XL1200X Turbo 48 Sportster/Buell Year: 2011 Sportster/Buell Model #2: XL1200 Roadster Sportster/Buell Year #2: 2008
|
|
1250 or 1275 Pistons and Cylinders
We know it is only 25cc so here it is.
The 1250 set installed has coated heavy flat top pistons for turbo, the unpurchased, uninstalled 1275 kit would have lighter flat top pistons.
Less mass in the pistons combined with the XR crank should spool up pretty quick.
Not going with domed pistons, higher compression, Hammer 570 cams are already in hand.
Was planning on switching the pistons and cylinders over to the Roadster and if the spirit moves, turbo the Roadster.
Just want to ride the 48.
So, only about 3% increase in power with 25cc.
Went online to check, Hammer is the only 1275 provider, done a bunch of business with them over the years, always satisfied.
Might add a new oil pump.
Thoughts?
|
4th March 2021
|
 |
XL FORUM TEAM MEMBER
|
|
Join Date: Nov 2004
Location: jupiter fl
Posts: 2,844 Sportster/Buell Model: 1200C Sportster/Buell Year: 04
|
|
I vote 1275 
__________________
04/07 1275 BFH heads .590 Cat 4 cams S&S 1.725 rockers S&S premium lifters BDL+15% clutch TC88A HSR-45 S&S 3" ac LSR 2-1
|
4th March 2021
|
 |
XL FORUM TEAM MEMBER
|
|
Join Date: Jan 2020
Location: Loxahatchee, FL (S. FL)
Posts: 1,114 Sportster/Buell Model: XLCH Sportster/Buell Year: 2003 Sportster/Buell Model #2: XL Sportster/Buell Year #2: 1981 Other Motorcycle Model: FXDC Other Motorcycle Year: 2013
|
|
1275
Just because!
__________________
Steve
'81 Andrews "Y" cams, K. Black 9-1 pistons
'03 1250 NHRS stage two Lightning heads, 536, mik 42
'01 Cyclone
'13 FXDC 96" stock
|
4th March 2021
|
|
Dazed & Confused
|
|
Join Date: Feb 2019
Location: Never Never Land
Posts: 2,136 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2017 Other Motorcycle Model: BMW R9T Other Motorcycle Year: 2015
|
|
Quote:
Originally Posted by Turbo Sporty 48
Was planning on switching the pistons and cylinders over to the Roadster and if the spirit moves, turbo the Roadster.
|
I think you answered your own question. If you're considering putting a/the turbo on the Roadster, saving the "turbo" 1250 pistons and cylinders for it and getting a 1275 kit for the 48 would seem to be the way to go. Or am I missing something? The 1275 kit also gains you some squish area which is a plus.
__________________
2017 XL1200C in SE Wisconsin, USA
|
4 Weeks Ago
|
|
Drag Race Champion
|
|
Join Date: Aug 2015
Location: On lake Erie
Posts: 355 Sportster/Buell Model: XLH883 Hugger Sportster/Buell Year: 2002
|
|
Go big or go home.  |
4 Weeks Ago
|
 |
XL FORUM TEAM MEMBER
|
|
Join Date: Jan 2008
Location: So Cal
Posts: 22,290 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2006 Sportster/Buell Model #2: XL1200C Sportster/Buell Year #2: 2006 Other Motorcycle Model: 48 "Totalled" By a Douche Other Motorcycle Year: 2012
|
|
'07 and up should have the updated oil pump already
__________________
Thy Sportster Come
It Shall Be Done
On Earth as it is on Salt
2006 Sportster XL1250C
Hammer Sledge Heads 1.98X1.61 Valves
Hammer 600 Cams
Big Ass CP/Hammer Pistons
Mikuni HSR 45 /Hammer Billet Manifold (Now HSR 48)
Jetted 27.5 slow,182.5 Main
97 Needle,Clip posistion 3
Hurricane Flow 3" offset AC,Rocketman Mod
Daytona Twin Tec TC88A,Rico Scarecrow Map
Sumax Thundervolt plug wires,NGK DCPR8EIX spark plugs. Gapped .040 and Indexed
Cycle Electric Stator and Regulator
Alto Carbonite Clutch (now with Barnett Pressure plate and 25% stiffer spring)
Royal Purple 20W50 MC Primary oil
Patriot Defender Pipe
Royal Purple 20W50 MC Engine Oil
Napa 7148 oil filter
Max Power, 111.47
Max Torque, 84.39
Best 1/4 Mile ET to date 11.85
Best 1/4 Speed to date 115.14
Build by Jester Motorwerkz West
|
4 Weeks Ago
|
|
Master Custom Bike Builder
|
|
Join Date: Sep 2010
Posts: 3,485 Sportster/Buell Model: XL1200X Turbo 48 Sportster/Buell Year: 2011 Sportster/Buell Model #2: XL1200 Roadster Sportster/Buell Year #2: 2008
|
|
35K Miles
Quote:
Originally Posted by rocketmangb
'07 and up should have the updated oil pump already
|
Just wondering if I should check it out. |
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +1. The time now is 17:06.
|
