F-Pro Microbearing Detent Arm
Tortured by false neutrals and missed shifts?
Damage to gearbox caused by missed shifts?
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. Had
anybody asked, we would have fixed it in 08.
Reduce ugly and unattractive friction for virtually
perfect shifting.
Make your transmission "snick" into gear and stay in gear.
Reducing the rotating friction allows the shift mechanism to
rotate quicker and get the gear dogs more fully engaged - so they
stay engaged under part throttle (as in when you are 15ft in the air
over a set of triples).This arm and recalibrated F-Pro spring are the solution in helping the
450 develop bulletproof
shifting.
The tough, steel raced, Hybrid
Ceramic Microbearing arm is the ultimate in friction
reduction for this use. The STD Steel
Microbearing
arm is 98% as good as the Hybrid (and $20 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.
"No missed shifts"
Factory Pro Tuning
415 883-5620
marc@factorypro.com
 2010
rmz450
Pro Shift Kit
(arm and spring kit)
Hi Marc, I got the Pro Shift kit installed on my RMZ 450
and at the same time i had the transmission gears and other
parts cleaned and polished up. I was able to hit the track
and there is a definite and noticeable improvement over
stock. So much it will take a few rides to get used to the
ease of the shift, thanks so much for a great product.
Cheers.
Warren L
Hi Marc
2015, April -
I have now tried the 3 parts
from you guys, 10 hours of
winter riding, 5 hours summer
riding.
RM-z450 08-19 Microbearing Detent Arm
- F-Pro
Competition Shift Spring
-
Before: I had at least 1-3
missed shifts every single time
out riding.
Now I have not had one single
missed shift after I installed
the parts.. SUPER , bike feels
like new, super fast shifting,
and I can focus on other
important things out riding, not
thinking about changing gear
proper so I don't miss the
gears..
THANKS! I have already recommend
this products to all my friends.
:)
Mikael
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
I give it a 10 out 10.
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