Yokomo YZ-834B explained
Yokomo YZ-834B "Dog Fighter" is a 1/10 scale electric-powered 4WD radio-controlled vehicle made by Yokomo. Introduced in 1983 for off-road racing, it has been cited by the website, LiveRC, as the first racing specific 4WD buggy[1] The car was marketed in Europe, sold by Graupner, as the Graupner Dogfighter[2] [3] and in the US by Delta Systems, as the Delta Dogfighter.[4]
As the YZ-834B required numerous upgrades and an investment of to make it competitive, Yokomo introduced the mail-order only SE 4WD featuring a host of parts that made the car competitive straight out of the box for despite being offered with a Yokomo 05R stock motor and a mechanical speed controller.
The RPS/Yokomo Dog Fighter SE was introduced following the win by Gil Losi Jr. The car was marketed by Ranch Pit Stop (hence RPS), a hobby retailer owned by Losi Jr's father; who later became known as Team Losi three years after.[5]
Ron Rossetti used this version of the car to win the 1986 .[6]
Despite its success in racing, including winning the aforementioned IFMAR Worlds, it was criticized for its low ground clearance, which meant it was unsuited to the UK racing.
The YZ-834B was replaced by YZ-870C in 1987.
| Year | Model | Details | Known issues |
|---|
| 1983 | Dog Fighter 834B (not pictured)Rare original release model with one shock absorber each end, exposed alloy roll bar, yellow wheels and black body pan. | - Front mono alloy shock
- Rear mono alloy shock
- Chain drive 4WD system
- Front one-way axles with solid center shaft
- Large bumper, extends to middle of front wheels
- Rear ball differential
- Rear anti-roll bar
- Dog Fighter lexan body with enclosed shocks and exposed alu roll bar
- 1.75-inch yellow wheels and Dunlop engraved spike tires
- 05R stock motor for 8 minute race
- Mechanical speed controller Forward/Break. and with a relay for reverse
- original cost 19,800 Yen
- Pristine examples now changing hands for UK£500+
| - The first version of the nylon gears weren't sturdy enough
- Motor plate was weak and prone to bending if misused. This problem has never been fixed through the last 834B model
|
| 1985 | Wonder Dog Fighter(could be late 1984) | - Thicker chassis with small bumper
- Upgraded front shock
- Rear dual shock
- Torque limiter
- Improved gears (they made new gears in 1984)
- Longer front lower arms
- Reinforced rear swing arms
- New Wonder Dog Fighter body based on Bolink Funco body
|
|
| 1985 | Wonder Dog Fighter Limited Edition | - 360SX Twin Turbo motor for 6 minute race
- 28,000 Yen
| |
| 1986 | Wonder Dog Fighter SE - 834B SE | - Super Aero wheels (aka tornado wheels)
- Hot Laps R-5 2" tires
- 360SX Twin Turbo motor for 6-minute race
- 29,800 Yen
| |
| 1986 | Dog Fighter RPS SE | - Fiberglass Chassis with small black bumper
- New body and new roll bar
- Improved shocks
- 05R stock motor
- New RPS tires made by Pro-line with 1.75" yellow wheels
- SE10 Standard Kit
- SE11 Deluxe Kit (with NMB bearings)
| | |
Works cited
External links
Notes and References
- Web site: FLASHBACK FRIDAY: Former IFMAR Electric Off-Road Worlds winners. LiveRC.com. 5 January 2016.
- Web site: Yokomo YZ-834B Dog Fighter. 2020-06-22. RC Scrapyard. en-us.
- Web site: Graupner Dogfighter. 2020-06-22. www.rccarmuseum.org.
- Web site: Delta Dogfighter. 2020-06-22. www.rccarmuseum.org.
- Web site: LiveRaceMedia. FLASHBACK FRIDAY: Timeline of Team Losi Racing 4WD buggies. 2020-06-22. www.liverc.com. en.
- Web site: Yokomo YZ-834B Wonder Dog Fighter. 2020-06-22. RC Scrapyard. en-us.
