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Upon checking out Bautista’s bike from a side profile, that seat looks so high up. And he’s only 5’4”. Looks similar in profile to your RaceSeat Steven.

6BE6C147-8A91-4D41-9848-BC3BBA33445C.jpeg
 
bp_SFV4 said:
I never noticed how much lower the top of the tank is.
Click to expand...

Yeah I noticed that too. I’d assume more tank is under the seat where the number plate is to keep CG lower.

It’s not a perfect 1:1 overlay but it’s close. I also noticed that wheelbase is maybe similar to stock despite what I’d imagine is an extended swingarm which was surprising.

Allegedly there’s a mass damper in the mini-bread box tail section too.
 
Kev242 said:
@Steven31371 Were you out at Chuckwallah a couple of Sun/Mondays ago for the SoCal day/member day? Thought I saw that graphic on track. Was chasing down some minor issues so I wasn’t the most sociable. Back out for the January SoCal round, hitting the JP43 group training the Friday before as well. Hopefully you and some members might be around.

Gonna be a sore monkey on Sunday night!
Click to expand...

I’ll be at Chuckwalla on Saturday, January 14!
 
SuperDomestique said:
A comparison from stock to WSBK. Basically not the same bike. View attachment 46524
Click to expand...

Look at the difference in foot peg location, similar seat height but the foot pegs dramatically different.

It was a former MotoGP rider that got me me looking a lot more at the height between seat and pegs, basically how bent my legs were, he looked at me on the bike and said I needed to lower my pegs and raise my seat a lot, and that he couldn’t ride well if his legs were bent as much as mine, so I lowered the foot pegs about a centimeter and raised the seat about 2 centimeters.
 
SuperDomestique said:
Yeah I noticed that too. I’d assume more tank is under the seat where the number plate is to keep CG lower.

It’s not a perfect 1:1 overlay but it’s close. I also noticed that wheelbase is maybe similar to stock despite what I’d imagine is an extended swingarm which was surprising.

Allegedly there’s a mass damper in the mini-bread box tail section too.
Click to expand...

They don’t dramatically extend the swingarm, mines 3.5 centimeters longer, if you expand the pic on your iPhone and put the front edge of the front tire on the right edge of your phone screen as the picture toggles, it looks like the front tire is about 3 to 4 centimeters difference in wheel base.

Looks like the fork rake might be different too
 
Steven31371 said:
Look at the difference in foot peg location, similar seat height but the foot pegs dramatically different.

It was a former MotoGP rider that got me me looking a lot more at the height between seat and pegs, basically how bent my legs were, he looked at me on the bike and said I needed to lower my pegs and raise my seat a lot, and that he couldn’t ride well if his legs were bent as much as mine, so I lowered the foot pegs about a centimeter and raised the seat about 2 centimeters.
Click to expand...

So 1 inch made as massive a difference as you're makin it seem?
 
Steven31371 said:
They don’t dramatically extend the swingarm, mines 3.5 centimeters longer, if you expand the pic on your iPhone and put the front edge of the front tire on the right edge of your phone screen as the picture toggles, it looks like the front tire is about 3 to 4 centimeters difference in wheel base.

Looks like the fork rake might be different too
Click to expand...
Good eye. Looks like the stock bike is 3.5 cm longer than WSBK per specs. I used that known wheelbase measurement to get other measurements on Bautista’s set up at launch. Btw, he’s 5’6.5” (169 cm).

B37E64DB-0C3C-4FE1-ADA3-67ED3FD4009C.jpeg


Bautista’s seat height is 20 mm higher than stock. I never thought about the seat height being higher for a shorter person could actually be beneficial.
 
SuperDomestique said:
Good eye. Looks like the stock bike is 3.5 cm longer than WSBK per specs. I used that known wheelbase measurement to get other measurements on Bautista’s set up at launch. Btw, he’s 5’6.5” (169 cm).

View attachment 46529

Bautista’s seat height is 20 mm higher than stock. I never thought about the seat height being higher for a shorter person could actually be beneficial.
Click to expand...

A higher center of gravity on a bike helps it turn better…most people think the SBK fuel tank has more fuel in the seat area to lower the center of gravity, that’s not the reason they do that, it’s to better center the center of gravity from front to back.

Higher center of gravity centered front to back is the goal for better turning.
 
Steven31371 said:
A higher center of gravity on a bike helps it turn better…most people think the SBK fuel tank has more fuel in the seat area to lower the center of gravity, that’s not the reason they do that, it’s to better center the center of gravity from front to back.

Higher center of gravity centered front to back is the goal for better turning.
Click to expand...

That is correct, more weight over the rear wheel too. This is the wsbk tank and subframe from the barni Ducati, i was able to get it off them after the wsbk round at Phillip island.
 

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SuperDomestique said:
Steven what were the specs for your seat? Ie how much padding did you opt for?
Click to expand...

Flat competition seat, squared sides, 20mm higher.

I would have went higher still but was worried I was going to loose too much real estate on the gas tank vertically for my legs to grab at lean.

Though that doesn’t seem to be an issue after all.

I’m also not sold on the squared sides, but won’t really know until I’m at the track, can’t really tell anything significant about these bikes on street test rides. But so far it seems like a slightly more rounded edge might be better with one ass cheek off and one on haha
 
Last edited:
Looks like F22 even has a different bore/stroke and capacity. Stock is 88 X 48 with 998 cc. Interestingly, F22 is 100x61 with only 950 cc. Amazing that despite lacking 50 cc it’s most likely the most powerful bike on the grid
 

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