Surging in first
 

I have an 06 Super Glide. In first gear going real slow, the bike really surges. It's not smooth at all. It's real jerky. Is this normal or do I have a problem?

think its normal mines the same way.

try lubing your throttle cables with inox or i use three inone oil
freebyrd

This is caused from running lean near idle conditions. Fairly normal for stock ecm calibrations. Not sure if there is a dealer download for that. I put up with that bs for the first season and got rid of it with a tmax install. Smooth and steady in any gear and throttle position.
Ron

Had a surge in all gears at lower rpms, but not lugging it. Dealer upgraded my map per service bulletin M-1220. They also changed my CPS (crank position sensor), all under warranty. Surge is pretty much gone but not some backfire, but is an improvement and I only put on about 30 miles since. Mine is an 07 Street Bob.

What's M-1220 service bulletin? Anyone have a copy of that?

My '06 surges in first gear to this day, even after a Dyno tune. I've learned to live with it.

Okay...I just was worried I might have a problem. It doesn't necessarily bother me that much as long as nothing's wrong. Thanks.

Surging can be caused by 8 degree fuel injectors on the 2006 models.

M-1185 1 of 2
SERVICE BULLETIN
M-1185 February 20, 2006
FUEL INJECTOR/CALIBRATION CHANGES FOR 2006 1450cc
BIG TWINS
®
Purpose
It has recently been determined that the 8
°
angle cone spray
fuel injectors used on 2006 1450cc Big Twins may cause cold
start and/or driveability problems on some motorcycles.
In the interest of promoting customer satisfaction, the 25
°
angle cone spray fuel injectors used on CVO 103 cu. in.
(1690cc) motors will be installed on all production Big Twins
beginning on or around February 13, 2006.
Additionally, Harley-Davidson will provide for the installation
of 25
°
angle cone spray fuel injectors on those motorcycles
where use of the 8
°
fuel injectors (part number 27625-06) is
determined to be directly responsible for cold start and/or
driveability problems. See REQUIRED DEALER ACTION.
NOTE
Due to changes in the manufacturing process, the part number
of the 25
°
angle cone spray fuel injector is changing from
27709-06 to 27709-06A. This fuel injector also will be
stamped with the words “25 DEG” for easy identification. See
Figure 1.
Motorcycles Affected
Only 2006 1450cc Big Twin model motorcycles that exhibit
cold start and/or driveability problems directly related to use
of 8
°
angle cone spray fuel injectors (including those subsequently
equipped with P&A Screamin’ Eagle 1450cc or
1550cc Performance Kits).
Required Dealer Action
1. Adhere to the flow chart in Figure 2 when handling customer
complaints regarding cold start and/or driveability
problems on affected motorcycles.
2. If the flow chart indicates that the fuel injectors are the
source of the problem, check the part numbers stamped
on the fuel injectors. While standing on the left side of
the motorcycle, the part number on the rear fuel injector
can be easily read with the aid of a flashlight.
3. If required, remove both 8
°
angle cone spray fuel injectors
following the procedure in the applicable 2006 Service
Manual. Install 25
°
fuel injectors, either part number
27709-06 or 27709-06A.
Figure 1. Fuel Injector Part Numbers
f2447x8x
Old Style 8°
Fuel Injector
New Style 25°
Fuel Injector
NOZZLE END
IMPORTANT NOTE
In the interest of preserving customer safety and satisfaction, always check for outstanding recalls whenever any motorcycle is brought into your
dealership for either maintenance or service.
©2006 HARLEY-DAVIDSON MOTOR COMPANY
ROUTING SERVICE
MANAGER
SALES
MANAGER
PARTS
MANAGER
LEAD
TECHNICIAN
TECHNICIAN
NO.1
TECHNICIAN
NO. 2
TECHNICIAN
NO. 3
TECHNICIAN
NO. 4
RETURN
THIS TO
INITIAL HERE
M-1185 2 of 2
NOTE
Always replace both 8
°
angle cone spray fuel injectors on
affected motorcycles. Never mix 8
°
and 25
°
fuel injectors on
the same motorcycle.
NOTE
If the part numbers on the fuel injectors are rubbed off or otherwise
unreadable, count the number of orifices or holes in
the injector nozzle. The 8
°
angle cone spray fuel injector has
just three holes, while the 25
°
has six. See NOZZLE END in
Figure 1.
4. Update the ECM calibration. For those motorcycles
equipped with P&A Screamin’ Eagle 1450cc or 1550cc
Performance Kits, refer to h-dnet.com for the correct calibration
P/N.
Credit Procedure
Complete a separate warranty claim for each vehicle
serviced. Reference Service Bulletin M-1185 in the
“Comments” or “Notes” section and be sure to include the VIN
of the vehicle on which the service was performed. Fill in the
rest of the claim as follows:
Performance calibrations require pre-authorization from Technical
Service to be considered for warranty coverage unless
listed on the SWR.
Upon receipt of the properly completed claim, you will receive
the labor credit shown above.
Figure 2. Cold Start/Driveability Flow Chart
Correct condition or install
compatible components.
Are cold start or driveability
problems still evident?
Check the following:
● Fuel has the recommended octane rating and is not
contaminated.
● IAC operation.
● Spark plug condition.
● Engine is configured correctly (with the appropriate air
cleaner and exhaust).
● Vehicle configuration is supported by the correct
calibration. Refer to Calibration Information on h-dnet.com.
Does the vehicle pass inspection?
YES NO
Check fuel pressure. Is
fuel pressure between
58-62 psi?
YES NO
Replace the 8° fuel
injectors with 25°
fuel injectors.
Update ECM
calibration.
Check part numbers
stamped on fuel injectors.
Are 8° or 25° angle cone spray
fuel injectors installed?
8° 25°
Refer to SYMPTOMS
DIAGNOSTIC in
Digital Technician.
Problem
resolved.
YES NO
5388
Applicable DT Code
Refer to SYMPTOMS
DIAGNOSTIC in
Digital Technician.
Applicable DT Code
ENTRY FIELD ENTER
Claim Type PRD, MC
Problem Part No. 27625-06
Detail Part No. 27709-06 or 27709-06A
Quantity of Detail Part No. 2
Description 25
°
Angle
Cone
Spray
Fuel Injectors
Labor Code 5388
Time 1.10 Hours
Customer Concern Code 9203
Condition Code 5388

SERT took care of my 1st gear surging.