V4S offset triples - school me

RickD996 · Dec 15, 2021

Personally, I'd buy new bearings for the stem.

And I'd start with stock setting, just to check it feels the same. Then go in 2mm increments and see how you go.

I've never fitted these before though, just how I'd go about it if I did.

Once fitted, you can always take the fork tops off and allow the bike to drop all the way down, check for clearance.

rac1ngsnak3 · Dec 15, 2021

Superbike Unilited had issues w shorter? offsets but they were also using an H2O rad, fancy forks, etc. Sorting out these unknowns is the other price you pay for these “upgrades”

Steven31371 · Dec 15, 2021

rac1ngsnak3 said:
Superbike Unilited had issues w shorter? offsets but they were also using an H2O rad, fancy forks, etc. Sorting out these unknowns is the other price you pay for these “upgrades”

Yes, clearly one should never venture into the unknown…it’s dangewus and scawy

TomFoolery · Dec 17, 2021

In the middle of installing the triples.

I'm going to 27 offset so I have to use the insert marked "1" in their instructions. Now this same insert is reversible to get to a 29 offset. IMA doesn't supply any instructions on which direction the insert should face to achieve a 27mm offset.

Should the fat part with the "1" marking face the road or face the rider to achieve a 27mm offset??

Steven31371 · Dec 17, 2021

TomFoolery said:
In the middle of installing the triples.

I'm going to 27 offset so I have to use the insert marked "1" in their instructions. Now this same insert is reversible to get to a 29 offset. IMA doesn't supply any instructions on which direction the insert should face to achieve a 27mm offset.

Should the fat part with the "1" marking face the road or face the rider to achieve a 27mm offset??

Hole toward the front decreases offset, toward back increases offset….top and bottom have to be the same size offset facing the same direction

Steven31371 · Dec 17, 2021

Fat part toward the rider to get less offset, which in turn will decrease trail and improve turn in

However, if you are trying to get a more stable front end you actually need to INCREASE offset and thereby trail over current setup

On my bike I had good turn in, if anything it was too lively with the loss of gyroscopic forces in my lightened rotating assemblies.

I needed MORE STABILITY not sharper turn in…so my bike has the 2 in there with the fat part toward the front

I like it but will probably change it to a 1 with the fat part toward the front.

For me that balances stability with turn in we’ll

But I’ve taken off close to 20 pounds of rotating mass off my bike, so it’s a good bit more lively through the twisties than most Ducati’s

Steven31371 · Dec 17, 2021

If the bike is turning in well but you want more stability on hard pulls and braking then try #1 with the fat part toward the front

If you are good on stability but want sharper more aggressive turn in then try the #1 with the fat part toward the back

craig bush · Dec 17, 2021

Steven31371 said:
Fat part toward the rider to get less offset, which in turn will decrease trail and improve turn in

It’s my understanding that offset and trail are inversely related - reducing offset increases trail.

TomFoolery · Dec 17, 2021

craig bush said:
It’s my understanding that offset and trail are inversely related - reducing offset increases trail.

Correct. Stock-off said is 30 and I'm going to 27 to increase trail.

TomFoolery · Dec 17, 2021

Steven31371 said:
Fat part toward the rider to get less offset, which in turn will decrease trail and improve turn in

However, if you are trying to get a more stable front end you actually need to INCREASE offset and thereby trail over current setup

On my bike I had good turn in, if anything it was too lively with the loss of gyroscopic forces in my lightened rotating assemblies.

I needed MORE STABILITY not sharper turn in…so my bike has the 2 in there with the fat part toward the front

I like it but will probably change it to a 1 with the fat part toward the front.

For me that balances stability with turn in we’ll

But I’ve taken off close to 20 pounds of rotating mass off my bike, so it’s a good bit more lively through the twisties than most Ducati’s

If what you are saying is that the fat part towards the rider reduces offset, then by having the number two insert with the fat part towards the road you went back to a stock 30 mm offset. So there is no change to your trail from factory.

If you see their spec sheet I posted a photo of the number two insert is either a 26 mil offset which is lower than factory or 30 mil offset which is the same as factory depending on which way you insert it

brad8266 · Dec 17, 2021

craig bush said:
It’s my understanding that offset and trail are inversely related - reducing offset increases trail.

That is correct.

rac1ngsnak3 · Dec 17, 2021

the blind leading the blind haha

burton · Dec 17, 2021

Steven31371 · Dec 17, 2021

rac1ngsnak3 · Dec 17, 2021

But I thought this was rake

And this was trail

brad8266 · Dec 17, 2021

The pic that Burton posted is a good visual. This .... isn’t all that difficult. Go stand over your bikes front end. You’ll notice the center line of your forks are in front of your steering stem bolt. That’s your offset. Now just visually imagine sliding the forks back closer to the steering stem (decreasing offset/increasing trail) or moving them father away (increasing offset/decreasing trail).

Might not be the most mechanically correct way to attack it but it works for me.

brad8266 · Dec 17, 2021

Steven31371 said:
Man I’d love to help but I had the shop put them on while they were doing a bunch of other stuff to the bike.

Also, I went with the #2 eccentric so I believe that put the bike at 28 mm

Works great for me but it’s super rider specific…I’d try less and add more

You might want to check that. These triples are 28mm offset with the 0 adapter. 2mm offset put you at 26mm or 30mm (stock) depending on which way you inserted the adapter.

Steven31371 · Dec 17, 2021

Sorry guys, was running to catch a flight, and wrote that backwards

Here’s how I had the shop put mine in…though I went with the 2 not the 3 eccentric

Good thing Tom is smarter than me or I’d be feeling bad about having him put them in backwards lol

TomFoolery · Dec 18, 2021

Now that the science is settled (jesus, why wouldn't they imprint a little marker arrow on the triple and the inserts?!?), here are some photos.

The IMA top triple is supposedly designed to allow more flex / better feedback.

Slightly heavier than the stock unit.

IMA bottom triple is supposedly engineered to be more rigid than stock.

Again, marginally beefier.

The dang inserts in question - two of each, one for top triple and one for bottom. With zero insert, these clamps are at 28mm offset. #1 makes it 29, #2 30 and #3 31. 1, 2 and 3 can be flipped around (towards rider as we have now established) for 27, 26 or 25mm offsets.

The "power stands" doing their job. There is nothing I hate in motorcycling more than stock bodywork. Freaking screws and clips and bs, takes so long to take the darn bodywork off. Once bike is deemed a keeper, race bodywork is a must do.

MaverickiB · Dec 18, 2021

My life was changed by Dzus fasteners. Switching from OEM to them has saved me countless hours. I love being able to pop off any bodywork panel in less than a minute.

V4S offset triples - school me

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