Shift star - Wrist Twisters
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post #1 of 13 Old 01-10-2014, 08:31 PM Thread Starter
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Shift star

For those that can't seem to spend enough on thier 919, these are pretty sweet. I had one in my XX and F4, thinking about doing it for my 9r.

CBR900, Fireblade, Honda, EC997a Eddy Current Dynamometer

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post #2 of 13 Old 01-11-2014, 11:07 AM
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Wow this looks like a sweet product.

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post #3 of 13 Old 05-08-2016, 11:04 AM
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Originally Posted by Ditch View Post
For those that can't seem to spend enough on thier 919, these are pretty sweet. I had one in my XX and F4, thinking about doing it for my 9r.

CBR900, Fireblade, Honda, EC997a Eddy Current Dynamometer
Did you ever do this? Thinking about it...

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post #4 of 13 Old 05-09-2016, 11:02 AM
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Pvister, I installed one on my 919, and the difference in shift feel was outstanding.
When I removed the factory parts, I also found that the plain-jane oem detention arm was also rather worn, but I am exceptionally hard on my things (at the drag-strip). The shift feel is a lot smoother, seems to engage quicker with a slightly shorter shifter throw, and provided a much more positive engagement in the next gear. Very nice products!
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30,000 mile 919 survivor. No plans of stopping the abuse any time soon.
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post #5 of 13 Old 05-09-2016, 03:00 PM
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Originally Posted by scrat View Post
Pvister, I installed one on my 919, and the difference in shift feel was outstanding.
When I removed the factory parts, I also found that the plain-jane oem detention arm was also rather worn, but I am exceptionally hard on my things (at the drag-strip). The shift feel is a lot smoother, seems to engage quicker with a slightly shorter shifter throw, and provided a much more positive engagement in the next gear. Very nice products!
Scrat, thanks so much! Can you explain how your detent arm was worn? Any way to tell without removing the clutch basket?

What size nut is the clutch nut? My largest is a 27mm and that doesn't fit. It looks like 1 3/16" or 30-31mm. Can you verify?

Did the kit reduce or eliminate the false neutrals?

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post #6 of 13 Old 05-09-2016, 08:15 PM
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The detent roller rotates on a shouldered "bearing" welded to the arm. Since the load is unidirectional the bottom of the bearing wears accordingly, leaving a crescent shaped void at the top. This allows the roller to wobble during shifts, and also inaccurately stops the shift drum.

The first time I saw a ball bearing detent arm was about 25 years ago, I think as part of a HRC shift kit, but can't recall what motorcycle it was for. One thing was for sure: it did work!

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post #7 of 13 Old 05-09-2016, 09:11 PM
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Rob... you are NOT helping me here....

Went ahead and bit the bullet. This is now officially the longest I've had my 919 out of commission and I'm going stir crazy.

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post #8 of 13 Old 05-09-2016, 09:16 PM
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Rob... you are NOT helping me here....

Went ahead and bit the bullet. This is now officially the longest I've had my 919 out of commission and I'm going stir crazy.
Good work PV - can you do us pics and a bit of a narrative about the whole saga when you start work? Sounds interesting...

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post #9 of 13 Old 05-10-2016, 06:25 AM
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As usual, Rob nailed it. I replaced mine because I was having several shifting problems and false neutrals at the track (internal trans issues) but it actually kept me running until I had time to pull the trans and have it repaired. I can't remember if I used a 30 or a 32, but your local parts store will likely have one of each on the shelf for a few bucks.

30,000 mile 919 survivor. No plans of stopping the abuse any time soon.
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post #10 of 13 Old 05-10-2016, 07:57 AM
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What was wrong with the transmission?

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post #11 of 13 Old 05-10-2016, 08:16 AM
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What was wrong with the transmission?

It was suffering from Beatashit Maximus

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post #12 of 13 Old 05-10-2016, 10:21 AM
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Good work PV - can you do us pics and a bit of a narrative about the whole saga when you start work? Sounds interesting...
I'm curious also. Always thought my 919 shifting felt sloppy compared to my SV's......

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post #13 of 13 Old 05-10-2016, 08:31 PM
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Quote:
Originally Posted by LDH View Post
It was suffering from Beatashit Maximus
Yep. I drag raced it for several years while putting 30k+ miles on the street. regular WOT shifting, even with a q/s on the power commander, ended up rounding off the dogs on the trans gears enough that engagements were not ideal. I've since had the trans back-cut and cryo treated, and the new electric shifter tied into the new ecu will provide full-auto shifting at a pre-set rpm above desired throttle position when switched on and clutch is fully engaged. Should prevent future issues.

30,000 mile 919 survivor. No plans of stopping the abuse any time soon.
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