Detent Arms, Stars and Drums and springs

Aprilia / Rotax
Aprilia Falco/Mille
2000/2006

Detent "star" profile
Aprilia
RVS1000
Falco
other Rotax engines

detent_star_Aprilia_RSV1000.jpg (13485 bytes) detent_star_Aprilia_RSV1000_back.jpg (11906 bytes)

hold down bolt: 6.0mmx1.00mm

dist across small pins: 31.11mm
dist across peaks:41.9mm
mount hole (backside) 23.92mm
overall height: 25.4mm
locating slot width: 8.92mm
locating slot height:  4.66mm

detent_arm_Aprilia_RSV1000.jpg (10978 bytes)

stock shift action:

highish pressure to shift, but doesn't snick into gear with authority. Steep and tall arms with 12mm roller make for excessive force required for shifts, w/o precision.

 New EVO Shift STAR kit!
 

SHFT-EVO-A10-KT

$199.95 

BMW twins
BMW R1100gs

 

 

detent_arm_BMWR1100.jpg (10915 bytes)

stock shift action:

kind of lackadaisical.

detent_spring_BMWR1100.jpg (6385 bytes)

Ducati twins

Detent "star" profile
Ducati 748,
00-02 and other twins

  

hold down bolt: 8.0mmx1.25mm

dist across small pawl indents: 32.0mm
dist across peaks:41.0mm
mount hole (backside) 16.97mm
overall height: 21.3mm

stock shift action:
weak feeling
slow action

Factory Pro arm, below

 

  

Honda
Honda

TRX300EX

FourTrax

 

 

 

OEM#
24430-HAD-000

 

cbr900/929 01-02
cbr954, 02-03
cbr600, 91-03
cbr600rr, 03-06
type

detent_star_929_inside.jpg (14924 bytes) detent_star_929_outside.jpg (13166 bytes)

hold down bolt: 8.0mmx1.25mm

dist across small pins: 27.2mm
dist across peaks:44.3mm
mount hole (backside) 24.98mm
overall height: 19.0mm

stock shift action:
firm, but no feel, no snick.
Needs improvement.

 

   NEW EVO-7 H21 kit - New Detent Start, Detent Arm and slightly heavier detent spring.
Honda

ST1300,  2004

supplied by
Holtrichtner, John
2007 02

 

 

OEM#
24430-096-700

  
OEM#
24435-MCS-000

Suzuki
Suzuki
GSXR750,96-99
GSXR600, 97-00
(750,00+ and 600,01+ are different, but feel the same)

detent_star_Suz_gsxr750,96-99.jpg (27851 bytes)

  Feel:
Stock feel is "notchy", due to shape of the ramps.
Detent spring rate increase makes shifting more positive - misses fewer shifts
I don't like the way the Suz's feel when they are shifted - but maybe I'm the only one who cares???
Feels like the newer Honda's. 		The SHFT-PRO-SUZ-37 kit helps shifting quickness, precision and misses fewer shifts.
Suzuki
GSXR750,00-05
GSXR600, 01-05
GSXR1000,01-06
TL1000r/s all
V Strom, 02-03
Hayabusa, all

Similar profile to the above 99, but different configuration.

shift detent star fits:

gsxr600    01-07
gsxr750    00-07
gsxr1000  01-07
gsx1300r  99-07
TL1000r    98-04+
TL1000s   97-02+

 Feel:
Stock feel is "notchy", due to shape of the ramps.
Detent spring rate increase makes shifting more positive - misses fewer shifts
I don't like the way the newer Suz's feel when they are shifted - Feels like the newer Honda's. 		Stock spring is ~.101" wire diameter>

The SHFT-PRO-SUZ-37 kit spring can be modified for an improvement.

Triumph
   

 
9 mm pivot
35mm center to center

oem: 1190022-T0301

  

Yamaha
Detent "star" profile
"3XV"
TZ250 92(ish) to 2002		 detent_star_tz250_92_01_3XV_inside.jpg (11395 bytes) detent_star_tz250_92_01_outside.jpg (10677 bytes)

hold down bolt: 8.0mmx1.25mm

dist across small pawl indents: 32.0mm
dist across peaks:41.0mm
mount hole (backside) 16.97mm
overall height: 21.3mm


17mm pivot
28mm center to center

stock shift action:

notchy, "grindy", especially under downshifts

Use our Y25 Kit Detent Arm!
 Huge improvement - esp. in downshifts!

  

YFZ350

Banshee

Yam-04

 

 

detent_arm_YFZ350_Banshee.jpg (10569 bytes)

stock shift action:
 

.113 wd

YFS200

Blaster

Yam-64

 

 

detent_arm_10V_Blaster.jpg (10874 bytes)
stock shift action:

  
YFM350

Warrior

Yam-63

 

 

stock shift action:

 detent_spring_Warrior,YFM350_25712.jpg (18822 bytes)
YFM660r

Raptor

Yam-66

 

 

detent_arm_5LP_Raptor.jpg (14700 bytes)
stock shift action:

  
YZ250f, 00-03

yz450

yzf426

 

 


stock shift action

 detent_arm_3XK-426.jpg (15245 bytes)

LINKS

View SOURCE Honda X reference charts

http://www.vsource.org

 

Model Year Code Spring, Drum Stopper Stopper Comp., Drum Star STD kit Pro Kit EVO Shift STAR kit
VFR750FL-P 1990-93 RC36 24435-MR7-000 24430-MR7-000   SHFT-HON-8 SHFT-PRO-HON-8  
VFR750FR-V 1994-97 RC36 24435-MZ7-000 24430-MR7-000   SHFT-HON-8 SHFT-PRO-HON-8  
VFR400RK-N 1989-92 NC30 24435-MR7-000 24430-MR7-000   SHFT-HON-8 SHFT-PRO-HON-8  
VFR750RJ-L 1988-90 RC30 24435-MR7-000 24430-MR7-000   SHFT-HON-7 SHFT-PRO-HON-7  
                 
RVF400RR-T 1994-96 NC35 24435-MR8-900 24430-MR7-000        
                 
RVF750RR-S 1994-95 RC45 24435-MW4-000 24430-GB2-710        
VFR800FIW-1;
VFR800/A2- VTEC		 1998- RC46 24435-MW4-000 24430-GB2-710     SHFT-PRO-HON-91 SHFT-EVO-H91-KT
CBR400RRL-R 1990-94 NC29 24435-MV4-000 24430-GB2-710     SHFT-PRO-HON-91  

Performance Parts

These shifter parts can become tired and worn over time, contributing to missed shifts. Factory Pro Tuning (San Rafael, CA) offers an upgraded set of parts in their Shift Improvement Kits and Trans Detent Arm Kits. Both kits contain an OEM replacement shift cover gasket and a heavy duty detent return spring, but the Detent Arm Kit "replaces the stock shift detent arm and its riveted disc with a new arm with a low friction MicroBearing assembly." The key to the kits is the stronger detent return spring, which basically forces the rider to shift with slightly more effort, and thus more positively, eliminating missed shifts. The latest Factory Pro innovation is the EVO Shift STAR, which, when combined with the MicroBearing assembly and heavy duty spring used in the Detent Arm Kit, result in "easier foot pressure, quicker shifts and virtually zero missed shifts at any throttle position or rpm you could think of." For more information, visit Factory Pro Tuning. Based on the Honda OEM part numbers, the following table shows which Factory kits should fit which bikes:

Model Year Code Factory Shift Improvement Kit Factory Pro Trans Detent Arm Kit Factory Pro EVO Shift STAR Kit
VFR750FL-P 1990-93 RC36 SHFT-HON-08 SHFT-PRO-HON-08  
VFR750FR-V 1994-97 RC36 SHFT-HON-08 SHFT-PRO-HON-08  
VFR400RK-M 1990-92 NC30 SHFT-HON-08 SHFT-PRO-HON-08  
VFR750RJ-L 1988-90 RC30 SHFT-HON-07 SHFT-PRO-HON-07  
RVF400RR-T 1994-96 NC35 SHFT-HON-?? SHFT-PRO-HON-??  
RVF750RR 1994 RC45 SHFT-HON-91 SHFT-PRO-HON-91 SHFT-EVO-H91-KT
VFR800FIW-1; VFR800/A2- VTEC 1998- RC46 SHFT-HON-91 SHFT-PRO-HON-91 SHFT-EVO-H91-KT
CBR400RRL-R 1990-94 NC29 SHFT-HON-?? SHFT-PRO-HON-?? SHFT-EVO-H??-KT

As you can see, there are some missing part numbers in the table, and if you look really closely, you will see something odd regarding the RC30 part numbers. Even though the RC30 uses the same OEM detent arm and spring as the other VFR750s, it has different Factory Pro part numbers. Well, there's only one other part in the Factory Pro kits, and that is the shift cover gasket... The RVF400R (NC35) uses the same OEM detent arm as the other RC30-based designs, but it has a different OEM spring part number. This may mean that the Factory Pro kit that fits the other bikes will fit--or it might not. (The '94-'97 VFR750FR-V also has a different spring part number, but the same Factory Pro shift kits that fit the earlier 750s still fit...) The NC29 has the same problem: same detent arm as another bike, but different spring. But, if the VFR800 kits do fit, that means the new EVO Shift STAR kit should also fit! (The cover gasket would probably be the wrong one, though.) Hopefully, Factory Pro will update their Web site soon to clear up these mysteries...


VSource.org Home   Copyright © VSource.org 1999-2006 [Sources: Factory Pro Tuning and Honda Parts Manuals and Microfiche]