16 - 20
|Factory Pro Shift Kit - Virtually Eliminate Missed Shifts|
(this is the stock arm)
(this sample pic of a F-Pro Microbearing arm)
*Hybrid CERAMIC Microbearing Detent Arm*
(tough steel races with low friction ceramic balls)
oem 25350-49h00 arm
(new F-Pro Microbearing arm)
STD STEEL Bearing Detent Arm
replaces oem 2016, 25350-49H00
F-Pro Microbearing Detent Arm
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
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 to install.
Marc "No missed shifts" Salvisberg
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
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.
|"Matched" F-Pro shift spring for the Microbearing Detent Arm|
Competition Shift Spring for the
(13-14 model must use both the F-Pro arm and the F-Pro spring)
oem 07-09, 25355-10H01 too soft
oem 10-12, 25355-49H00 too soft
oem 13-16, 25355-49H10/H20 too strong
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
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
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.
Install the stud with
enough threads exposed for the locknut.
|Pro Shift Kit
std 27mm 1/2" socket
1/2" air or electric impact wrench
Suzuki service Manual
normal hand tools
Thanks Lance H. of Petaluma, CA for the pics and first retail install.
Thanks Ernie and Margie of Cycle West for the help.
remove brake pedal
remove 5 pressure plate screws
remove clutch nut
27mm standard socket for clutch basket
|remove clutch basket|
shift lever (lh side)
remove shift shaft
remove the 2 shift pawls and 2 springs
(be careful and check how the slots are oriented)
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
EFI and Carb Tuning - Most all FI and carb tuning
by Wheelsmith Racing
Flight Training - train with AMA race winner Todd Harrington.
The Harringtons own American Flyers, one of the most established flight training facilities in the USA.
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The extension of the laboratory
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