V4R with pierobon swingarm

Steven31371 said:

I doubt there is a V4 out there including superleggera’s that have more into them than this one, and there’s a lot more that could be spent.

I went with upgraded fork inserts versus entirely new front forks for example.

None of it makes me fast though haha…I’m certainly faster than I was on it when I first got it, but that’s because the bike is custom fit to me everywhere and I made it easier to ride fast….but I’m so far below this bikes capability with my riding that the only thing that will make me faster now is more track time. Which this year will be my biggest “mods” moving forward. I was sidelined with an injury and surgery for about a 6 month window there, so I occupied my time building MY perfect bike, but I’m bout back to riding shape now so now only track time will make improvements in capabilities.


(Probably closer to $70k…$120ish all in)

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Dude bro, you don't have to explain. Modding the bike is the activity that gives you pleasure, not what happens after you mod it. I never see you claim to be fast or lecture someone on chassis dynamics or body position. You are authentic about what this bike is and what it's not for you, I respect that. Don't bother explaining yourself, keep doing what you are doing.

oh, and jesus christ and Vishnu - $120k would buy so much H&C!

Paul G said:

Steven, was there a DSSA option?

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DSSA?

Steven31371 said:

DSSA?

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double sided swingarm

All with a Sachs shock. Hilarious.

bp_SFV4 said:

All with a Sachs shock. Hilarious.

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Maybe just for mock-up

Mock-up. Tamburini bike

Ahh. Makes sense.

Paul G said:

Steven, was there a DSSA option?

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yeah but not what I want for this bike and how I’ll use it that was a step too far, lots of stuff on the rear end needs researched and subbed out to do the DSSA.

on a different bike with a different purpose, i.e. building the best possible track day only weapon I might go there, I’m not ruling out ever competing, but this bike ain’t that.

it’s sorta my version of a track capable halo street bike….will get more track miles than street miles moving forward, but I still want to see it sitting there in the garage, get hungry for it, and be able to jump on and go get a quick adrenaline fix anytime on any road I want to.

sort of a Jack of all trades bike, not a specialized weapon

Steven31371 said:

View attachment 41824View attachment 41825

it’s already here, waiting on my rear shock to arrive from Ohlins to put it on, have shop time scheduled for the 15th of April

all at once I’ll have the Spark WSBK exhuast, Woolich harness and tune, H20 Radiator, the new brake Calipers (GP4-MS), the extended swingarm, custom valved Ohlins GP rear shock, and FGRT Front fork inserts and a few other little bits and bobbins installed to harden up some weak points on the bike

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Looks great , can’t wait to see your bike finished,

How has the pierobon swingarm performed over the year? Is it still installed?

Stretching the OEM swingarm by 35mm doesn't seem like much of a performance gain compared to utilizing EBC or smart dynamics going into the turn. Most of these DSSA/SSA options are atrocious, including the eccentric hub tensioners. There's quite a bit of suspension posts on the forum but it seems folks are more about swapping out the plug and play rather than shaking down the OEM hardware or dialing in engine/rider controls

There's a lot of discussion on how to set the bikes up, there seems to be a lot less about aftermarket bolt ons these days

Jolly Roger V4 said:

Too short I think

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x2

My understanding is that they settled at 35 mm extension because it means you can still use a std 120 link chain

I have the Pierobon Swingarm, took awhile to get the bike dialed in to make it turn with as much agility as a stock swingarm bike, but only because you need slightly different settings and a much stronger rear spring.

The biggest advantage is stability on hard acceleration. I was following a guy with a well set up V4S who is 10 or 12 seconds faster than me at Chuckwallah a few weekends back, he was getting on the throttle much harder much earlier than me and flying away from me coming out of the corner…meaning he was giving himself probably a 30 or 40 meter head start of being hard on the throttle coming off an apex than me, but his top speed on the back straight of Chuckwallah was about 134, by the end of the day I was doing 136, with a much shorter space to do it in because I wasn’t getting hard enough on throttle early enough, I also weigh 40 pounds more than him. Point being, the Pierobon swingarm let’s you accelerate harder because it MECHANICALLY produces anti-wheelie, so there is no electronic intervention cutting the power.

Next time I’m out with him I’ll see if I can follow him with both of us using our go pros to record the dash, I’m super curious to see where and when his dash light indicators show electronic intervention versus mine.

Another area that the Pierobon seems to affect is that it increases the threshold before the rear end starts to slip when at higher lean angles, but then it’s a less progressive slip when it does go, but Ducati’s electronic Nannie’s seem to reign that in a bit.

Bottom line, it’s an expensive mod, that I’m not fast enough to get everything out of yet, that requires much more research and attention to set up correctly, but, if you are chasing 10th’s absolutely worth it, probably not if you aren’t.

Paul G said:

There's a lot of discussion on how to set the bikes up, there seems to be a lot less about aftermarket bolt ons these days

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I think that’s partly because setup is ripe low hanging fruit that doesn’t cost anything, or much, so it should be looked at 1st.

Thank you for the review, that was the kind of information to look for, increasing the DSC threshold. It's interesting the stock electronics have a slower "perceived" lean or tire slide with only 35mm added, but the bike still overperforms in the turn. I like to lean on the DSC when going into a turn so I bet it's been quite a time dialing in the bike with the new dynamics. It's interesting the slightly longer swingarm or option from Ducati hasn't been made, considering the Superleggera SSSA is 8mm (I think, measuring wheelbase numbers) longer than the V4R, granted the carbon frame needing the length for flex.

The swingarms differ by a factor of 3 between V4R and Superleggera, which would mean a 27mm extension instead of 35mm would bring it into Superleggera dimensions. I wonder why Pieorbon or Ducati doesn't make a an OEM swingarm with that consideration, since the 35 does perform well and seem to trick the electronics. Or is it the standard 120 link chain as mentioned earlier that brings the Pierobon out to 35? I want performance not a standard chain.

Looking forward to the video, are you both running stock sprocket ratios?

Steven31371 said:

Another area that the Pierobon seems to affect is that it increases the threshold before the rear end starts to slip when at higher lean angles, but then it’s a less progressive slip when it does go, but Ducati’s electronic Nannie’s seem to reign that in a bit.

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This part seems counterintuitive… the longer wheelbase should in theory be more progressive with grip loss.

I think the electronics is what makes up for the counterintuitive longer wheelbase. The IMU is searching for the standard axis slip given the OEM swingarm length, but the "longer" wheelbase allows the IMU to be a little sloppy, allowing for deeper lean angle and higher throttle, and is still searching before the rider is picking the bike back up, as mentioned by the perceived, less progressive slip. In theory it would be a progressive slip without electronics and the longer swingarm, which is why I was curious of the performance over a year, but the electronics seem to almost compliment the slightly longer wheelbase