Little Video on Reversing Headstock Cups

RickD996 · Nov 16, 2021

This one is a little dry, but worth a try if you're struggling with bike setup, especially if initial turn in is slow.
This worked for me, in conjunction with other changes, may or may not be for you.
Steepened the rake by 1 degree.

rac1ngsnak3 · Nov 16, 2021

Be interested to hear your thoughts on the change. Should quicken steering inputs at the expense of braking stability.

endodoc · Nov 16, 2021

Just to add I might suggest “buy a fricking bearing press” and save the hammer for nails.

lotus7 · Nov 16, 2021

Would freezing the cups and slightly warming the recess for the cups allow an easier installation?

BP PanigaleV4S · Nov 16, 2021

The proper tool is a press. With freezing or hammering the big problem is that they aren't being set straight and plumb. If you don't have access or can afford one, drop by a shop and ask. At worst you'd have to pay for an hour of labor.

Ferrari sets valve seats on some engines with a robot that dips the part in liquid nitrogen then seats them. That would have a MUCH more significant effect than freezing it to the level you get from your kitchen fridge.

endodoc · Nov 16, 2021

Park press. Fit the cups and bearings for the V4/V2 perfectly. Made in USA. $189.00. Do the right thing, buy it

TomFoolery · Nov 17, 2021

The guy posts a video showing how to do something and all he gets is criticism about the tools he used. Tough crowd.

RickD996 · Nov 17, 2021

:'D

It's the world we live in!

The hammer and nylon block did no harm, a bit of lubricant would've made the job easier.
Good to know there's a specific tool for the job though.
If I was doing it more than five or six times, I'd probably get the tool.

RickD996 · Nov 17, 2021

rac1ngsnak3 said:
Be interested to hear your thoughts on the change. Should quicken steering inputs at the expense of braking stability.

Before making the change, I was going to sell the bike, so it worked out well!
I did lose a very small amount of braking stability, but the setting I am using had given huge gains in that area, as well as on the throttle. So giving up a little, to give good turn in (agility), was easily worth it. Plus, I have more braking stability than stock, and more agility, and better on throttle stability too. It's been a win win win.

BP PanigaleV4S · Nov 17, 2021

I’m sure endo can speak for himself, but my post certainly wasn’t meant as harsh negative criticism.

Just having a conversation about working on bikes.

craig bush · Nov 17, 2021

RickD996 said:
… I have more braking stability than stock, and more agility, and better on throttle stability too. It's been a win win win.

More agility from the decreased rake, correct? What changes improved stability under braking and acceleration?

Appreciate your vids fwiw.

RickD996 · Nov 17, 2021

craig bush said:
More agility from the decreased rake, correct? What changes improved stability under braking and acceleration?

Appreciate your vids fwiw.

Yes, I believe stock is 24.5⁰, and spinning the cup takes it to 23.5⁰, if everything else is stock.

The biggest change was swingarm pivot (SAP), from stock (-3) to +1. This alone gives phenomenal braking and throttle stability, but the bike is a pig to turn.

Shock, I went to 311mm (measured freestanding shock without stretcher). With stock SAP, I was running 317mm, 10mm preload was not changed.

Previously, forks were flush. New setting there's 4mm showing. 9 clicks of fork preload.

And wheelbase pretty much at maximum.

RickD996 · Nov 17, 2021

Thanks Craig, glad you enjoy them!

endodoc · Nov 17, 2021

TomFoolery said:
The guy posts a video showing how to do something and all he gets is criticism about the tools he used. Tough crowd.

LOL didn’t mean to be a jack ass, it just comes natural. First, this subject has been covered including the tools to do the job easily and correctly numerous times. Second, making a habit of using the wrong tools and then perpetuating that philosophy leads to compromises in other areas and other riders adopting questionable mechanical methods which sends them and their bike directly to the dealer to get ass raped.

A long bolt with two large washers (duct tape on the washer face)and two nuts is about 5 bucks and works pretty well as a makeshift cup/bearing press. That same bolt can be used in reverse to safely remove the cups from the frame. Another reason to use a press is if you don’t put the cups in evenly, you will for sure tear up the sides of the cup or cup socket. The press or bolt allows you to draw the cup and or bearing into the receptacle evenly avoiding damage. The Park press is also ideal for swing arm bearings and rear hub bearings.

RickD996 · Nov 17, 2021

Tbf, the manual does say to tap them out with a drift

And a press to return them. Next time...

BP PanigaleV4S · Nov 17, 2021

Did you heat the frame to 100C?

RickD996 · Nov 17, 2021

:'D

bp_SFV4 said:
Did you heat the frame to 100C?

Haha, no! But I was expecting too. That's probably why I didn't use oil when reinserting them, as the popped out so easily.

endodoc · Nov 17, 2021

Popping the cups out with a soft material is not an issue however again I would exercise caution in getting them out straight. That being said, I have seen more than enough sets of cups on eBay that were knocked out with a chisel, punch or screwdriver to warrant the comment. Giving the number of specialty tools and precision mechanics that are involved in working on and setting up a track or race bike, ya have to giggle just a bit when you see a giant steel hammer coming out.

TomFoolery · Nov 17, 2021

endodoc said:
Popping the cups out with a soft material is not an issue however again I would exercise caution in getting them out straight. That being said, I have seen more than enough sets of cups on eBay that were knocked out with a chisel, punch or screwdriver to warrant the comment. Giving the number of specialty tools and precision mechanics that are involved in working on and setting up a track or race bike, ya have to giggle just a bit when you see a giant steel hammer coming out.

specialty tools, precision mechanics yadda yadda

Just give it gas. That's all there is to racing, whoever holds it open the most amount of time wins.

This is why you see the fastidious no-expenses-spared meticulous well prepared all carboned-out Ducati rider get passed by the rickety old SV650 that looks like it should have been put out of its misery 4 years ago.

endodoc · Nov 17, 2021

TomFoolery said:
specialty tools, precision mechanics yadda yadda

Just give it gas. That's all there is to racing, whoever holds it open the most amount of time wins. This is why you see the fastidious no-expenses-spared meticulous well prepared all carboned-out Ducati rider get passed by the rickety old SV650 that looks like it should have been put out of its misery 4 years ago.

Uh, yea, whatever you say chief

Little Video on Reversing Headstock Cups

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