Kyosho produced the Ultima in 1987. But the same year, during the World Championship, Joel Johnson drive a prototype which inspired my restoration.
A link to the WC Ultima from Studio68 : Here
An article about the world 87 in a french magazine:
The beginning started from a chassis and a sheet of epoxy. I don’t remember how this chassis came to me. It look like Ultima Pro’s chassis cut to reduce the width.
Before this result I worked many hours to fill multiple holes with tamiya cement and painted all in black.
The upper deck gauge.
I found a Kyosho ball differential for Ultima as NOS and decide to put onto the transmission. The original gear was good but this Option House is the cherry on cake.
Notice, they is no differential drive ring. The balls are retained just by the outdrives.
I also add Kyosho Gold dampers
I dyed CRP wheels in orange
And this is how the buggy look after few weeks.
I don’t like the kyosho steering. The servo saver look to weak. I rather like to change it with a bellcrank from an 1984 RC10.
I swap all the Kyosho links for Team Associated links, I’m an RC10 addict!
The upper deck is in place, the battery is put in the chassis length. All Futaba electronic is periodic, like the AYK magnum motor.
Some pictures details
The body come from the Kyosho Tomahawk and the wing from the Ultima.
And the dream came true:
I’m like Joel Johnson, a Futaba Magnum radio in hand, testing my brand new kyosho prototype. I climb the podium, all the trims are adjust and…
The buggy started in a straight line like a rocket The kyosho ball differential is very smooth.
The first corner came too fast, I don’t have the time to brake. Amazing! the car turn without overstreer, the rear drivetrain is glue to track. The steering is very precise, “thank you” RC10!
A big jump put the car to the air and the fantastic gold dampers do the job better than I ever hope. The light chassis is well balance.
I make the perfect lap at each time but my Sanyo 1200 Nicd decided to stop, It is empty. The Ayk 360 Magnum turn like a charm during 6 minutes.
What a beautiful moment.
David from RC4ON
More pictures here:
Kyosho Ultima Worlds 1987 Inspiration