Members Birthdays
|
|
Main Menu
|
|
1st December 2006
|
 |
Master Mechanic
|
|
Join Date: Sep 2006
Posts: 289 Sportster/Buell Model: XL50 #870 Sportster/Buell Year: 2007
Reputation: 98
|
|
Anyone changing to 7000 rev limit?
Has anyone changed valve springs in order to increase rev limit to 7000 rpm? How did you overcome the ECMs rev limiter? Any other modifications?
__________________
07 XL-50 #870 Stage 1
06 VRSCR "Hyper-fast Touring"
Kansas City Missouri
λεγει αυτω ο ιησους εγω ειμι η οδος και η αληθεια και η ζωη ουδεις ερχεται προς τον πατερα ει μη δι εμου John 14:6
|
1st December 2006
|
 |
Senior Master Custom Bike Builder
|
|
Join Date: Sep 2006
Location: Dallas
Posts: 7,702 Sportster/Buell Model: XLH 1200 Sportster/Buell Year: 1988
|
|
My ignition has adjustable rev limit, but I hate to rev my motor past 6500 and even that makes me cringe. It's the thought of the piston speed that worrys me. How often do you want to rebuild your motor?
|
1st December 2006
|
|
Senior Master Custom Bike Builder
|
|
Join Date: Aug 2005
Posts: 3,839 Sportster/Buell Model: XL1200C Sportster/Buell Year: 05
|
|
I don't think you need to change the valve springs to rev the engine to 7K rpm. I think the stock valve train can safetly rev to 7K rpm. If you look at the SE catalog they have a chart where they put in SE E cams and increased the rev limit to 7K rpm without changing the valve springs.
__________________
2005 XL1200C
Those who trade liberty for security have neither.
|
1st December 2006
|
|
Senior Master Custom Bike Builder
|
|
Join Date: Dec 2005
Posts: 5,336
|
|
my engine isnt making any significant power over 4000 rpms. i shift when needle hits around 5800rpms to keep it off the limiter
|
1st December 2006
|
 |
Master Bike Builder
|
|
Join Date: Mar 2005
Location: Clovis, CA
Posts: 2,013 Sportster/Buell Model: Nill
|
|
Quote:
|
Originally Posted by lagerdrinker
my engine isnt making any significant power over 4000 rpms. i shift when needle hits around 5800rpms to keep it off the limiter
|
Damn! lager are you srerious? Mine is just seriously kickin in around that range  . Serious!
Swankster
__________________
"Stop Global Whining"
"Life, Liberty and the Pursuit of Anyone Who Threatens It"
"A Dead Enemy Is A Peaceful Enemy - Blessed Be The Peacemakers"
Still BIKELESS & hating Life!
|
1st December 2006
|
|
Senior Master Custom Bike Builder
|
|
Join Date: Dec 2005
Posts: 5,336
|
|
Quote:
|
Originally Posted by Swankster
Damn! lager are you srerious? Mine is just seriously kickin in around that range . Serious!
Swankster |
yeah, heres my dyno sheet. from around 4-6k rpms i gain 3 hp. still using 883 heads and 497 cams. need headwork done to get more
 |
1st December 2006
|
|
Flat Track Champion
|
|
Join Date: Jun 2006
Posts: 661 Sportster/Buell Model: SEVERAL Sportster/Buell Year: 2004
|
|
7K is a bit silly with these motors. Maybe keep some spare cases on hand....
You'd be better off winding a stock Chevy 350 to 8K
|
1st December 2006
|
 |
Chief Harley Engineer
|
|
Join Date: Oct 2005
Location: Iowa!
Posts: 540 Sportster/Buell Model: 1200C Sportster/Buell Year: 2004 Other Motorcycle Model: BMW R1200RT Other Motorcycle Year: 2005
|
|
The XB's have a 7K rev limit stock. I would think the motor can handle it.
|
1st December 2006
|
 |
Bike Builder
|
|
Join Date: Nov 2004
Location: Tinley Park, IL
Posts: 1,807 Sportster/Buell Model: 883/1212 XL Custom Sportster/Buell Year: 2004 Sportster/Buell Model #2: XLCH STROKER Sportster/Buell Year #2: 1959
|
|
Quote:
|
Originally Posted by cadiero
The XB's have a 7K rev limit stock. I would think the motor can handle it.
|
Don't forget the XB's are a different animal. You guys can correct me if I'm wrong but I think the Buell's have a lighter flywheel asembly and the stock valve trains are different that a Sportster's. So going to 7k with one is easier.
I think that if H-D thought a stock Sportster could go to 7k they would of allowed it from the factory. Performance bike selling point, yes? I know that the SE ignition lets the motor rev but I'm sure they felt that the usage of that unit would be for modified motors not stockers.
Plus I have to agree with Lager why would you want to rev a stock motor to 7k it's not like it's going to make any more power. If you are racing you try and shift within the power band not outside of it.
__________________
2004 Vivid Black 883 Custom, CONVERTED With NRHS 1212 Cylinders, 10.5 to 1 NRHS Dome Pistons, Stage 2 NRHS 1200 XB Heads, SE .551 Cams, TC88A, All the Right Stuff
|
1st December 2006
|
 |
Bike Builder
|
|
Join Date: Nov 2004
Location: jupiter fl
Posts: 1,828 Sportster/Buell Model: 1200C Sportster/Buell Year: 04
|
|
My '04 stock ignition rev limiter was 6k.
__________________
04 76"C NRHS #2 CP 10.5:1 .575 cams TP rockers TC88A HSR-42 S&Sac LSR 2-1 Can you say--- screamer?
|
|
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 09:46.
|
