rm-z250

07-15

Pro Level offroad


 

Factory Pro Shift Kit  - Virtually Eliminate Missed Shifts


(this is the stock arm)


(F-Pro Microbearing arm)

SHFT-ARM-S28-Hybrid CERAMIC
RM-z250, 07-15
*
Hybrid CERAMIC  
Microbearing Detent Arm*
(tough steel races with low friction ceramic balls)
replaces
oem 07-14, 25350-10H00 arm

$89.95

1. Choose your shipping method

2.
 




(new F-Pro Microbearing arm)


SHFT-ARM-S28-STEEL
RM-z250, 07-15
STD STEEL Bearing Detent Arm
replaces oem 07-14, 25350-10H00

$69.95

1. Choose your shipping method

2.


F-Pro Microbearing Detent Arm
Hybrid Ceramic microbearing
or
Steel microbearing

Tortured by false neutrals and missed shifts?  Gearboxes last only 5-10 races?

Part of the shifting problem is that there is just too much friction in the shift mechanism. Factory Pro produces a detent arm with a slick rotating ball bearing instead of a stock scratchy riveted disc.

Reduce ugly and unattractive friction for virtually perfect shifting.
Make your transmission "snick" into gear and keep itself in gear.

Reducing the rotating friction allows the shift mechanism to rotate quicker and get the gear dogs over quicker and fully engaged - so they stay engaged under part throttle (as in when you are 15ft in the air over a set of triples).

The F-Pro arm and the recalibrated, heat treated F-Pro spring are the solution in helping the Suzuki develop bulletproof shifting.

The tough, steel raced, Hybrid Ceramic Microbearing is the ultimate in friction reduction for this use. The STD Steel arm is 98% as good as the Hybrid  (and less expensive) - and both are way slicker than the stock riveted roller.

 Installation: The detent arm and shift spring sit right under the clutch basket - so, it's just R&R the clutch basket to install.  About an hour.

Marc "No missed shifts" Salvisberg
Factory Pro Tuning

415 491-5920

marc@factorypro.com

 

    Works great!  It was easy to install.    S. Berger (rmz250)

     It's freggin awesome. Night and day difference.. I raced this weekend.. 4 motos and never a miss shift or false neutral   Dec 2013

  I had the new detent spring installed and also went with the Factory Pro arm - it doesn't have any slop/play like the stock unit does. Rode it today for the first time and it shifts like my 450 now. Not a single missed shift. That's the best spent mod I may have ever done,    Dec 2013

   I initially thought the Factory Pro arm and spring was very pricey, but what I learned, this is all these guys do. They have a niche and they do it well.
What I can say is this was one of the better
mods I've done to a bike. My shifting is so predictable now. TDC51  Dec 2013

Feedback:
marc@factorypro.com

 

"Matched" F-Pro shift spring for the Microbearing Detent Arm



F-Pro
 Competition Shift Spring for the
RM-z250, 07-
14
(13-14 model must use both the F-Pro arm and the F-Pro spring)

pn: 
Z95-S28-0601  $39.95

replaces
oem 07-09, 25355-10H01 too soft
oem 10-12, 25355-49H00 too soft
oem 13-14, 25355-49H10 too strong

1. Choose your shipping method

2.
 

 


F-Pro  Competition Shift Spring

Miss fewer shifts. Fewer false neutrals.

Suggest the Arm + Spring for best  results.

Helps speed up shifting because the shift drum rotates quicker between shifts. Combine with the F-Pro Microbearing Shift Detent Arm for the sweetest results.

Our spring is matched to the F-Pro Microbearing Detent arm  - not sledgehammer over-stiff.


Marc "No missed shifts" Salvisberg
Factory Pro

marc@factorypro.com


Note: We have not long term tested the extremely stiff, but less expensive, 2013 RM-z450 spring. I know it will work with our arm, but it's way more pressure than the arm needs to be to fix the shifting and I'm a bit concerned about long term wear in the shift mechanism, especially with a stock arm.

Adjustable Center Shift Stud   $29.95
07-14 rm-z250
08-14 rm-z450

1. Choose your shipping method

2.

If the shift shaft fingers aren't centered on the shift shaft, Factory Pro has the fix.

To get equally good up and down shifting - you need to control how the shift shaft grabs the detent star posts.

It's a special offset "centering" stud, adjustable by almost 1mm.
More experienced mechanics will recall when almost all transmissions were equipped with parts like these. That allowed the engine builder to set the shift shaft to exactly in the center for the best possible shift performance.

Install the stud with enough threads exposed for the locknut.
Turn stud till shift shaft "fingers" are centered on detent STAR pins.
Tighten down the locknut.
Recheck indexing.


This is NOT the right picture.
The rmz has a different setup to turn the shift drum - but - it still uses "2 things" to push the shift drum around. One side for upshift and the other side for downshift. Ideally, the 2 shift shaft arm pusher "things" should be centered on the thing (or things, as in the above picture). On the rmz, you'd center the 2 spring loaded "gear shift pawls" in the notches in the shift star.
That makes equal shift lever travel in both upshifts and downshifts - improving shifting.

    

 

Pro Shift Kit Installation

rm-z250 09-14
rm-z450 08-14

tools:
std 27mm 1/2" socket
1/2" air or electric impact wrench
Suzuki service Manual
normal hand tools
Here is the start.

Thanks Lance H. of Petaluma, CA for the pics and first retail install.

Thanks Ernie and Margie of Cycle West  for the help.

remove water pump hose
remove kickstarter
remove brake pedal
remove cover
remove 5 pressure plate screws
remove clutch nut
27mm standard socket for clutch basket
remove clutch basket  
remove shift lever (lh side)
remove shift shaft
remove the 2 shift pawls and 2 springs
(be careful and check how the slots are oriented)
 
remove center shouldered shift star hold down bolt
remove the Shift star

remove old shift arm and spring

install new microbearing detent arm and F-Pro spring
 


 

 

 

 

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Contact Factory Pro
M-F, 9am - 5pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 491-5920

parts information
 info@factorypro.com

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Product Support /Tech SECTION
click here

 

Mailing / Shipping address:

Factory Pro
179 Paul Drive
San Rafael, CA 94903
USA

And most importantly
Restart back at the HOME page and click on the red box in the top left to find the bike that you want parts for...
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LINKS
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