Honda 350X ATC 3 Wheeler (Specs and Review)

A real off-roading fanatic would undoubtedly acknowledge the Honda 350X ATC because the archetype of modern-day utility autos however with three wheels as a substitute of 4. This head-turner isn’t solely a critical path machine but in addition included within the illustrious Large Purple bikes – part of Honda’s sport ATC lineup that started within the ‘70s. Given its racing lineage and status, it could be fascinating to know what this respected car has to supply.

Produced from 1985 to 1986, the Honda 350X ATC (Large Purple 350) featured crisp brakes, grippy tires, and a strong 350-cc mid-range motor. It was the penultimate installment to the legendary Large Purple collection – a lineup of performance-built trikes designed for aggressive trails and racetracks.

The Honda 350X was solely within the off-roading limelight for 2 years. However no interval is just too brief for one thing as nice as this bike. Regardless of its incapability to execute fancy stunts and jumps and its want for physique English to unleash its potential, the 350X was a standout, nonetheless. Savvy aficionados would undoubtedly agree. However if you’re not fairly satisfied, this information will enlighten you on the large affect this three-wheeler had on present-day utility autos.

White 1986 Honda 350X ATC 3 Wheeler

The Honda Large Purple 350

The Honda 350X ATC is ninth within the line of all-terrain cycles and the third era of Large Reds launched by Japanese producer Honda. Launched in 1985, the Honda 350X launched throughout the peak of the ATC craze, alongside different revolutionary machines – and had a whole lot of promise. Honda engineers had racing in thoughts throughout the design strategy of the trike. Nonetheless, it turned out to be extra of a sport machine than a racer. Because of the 1988 Consent Decree (or ATC ban), it solely lasted available in the market for 2 years earlier than its demise. Consequently, Honda didn’t have the chance to additional develop the machine, because the trade shifted its route in the direction of four-wheelers.

Usually in comparison with the ATC250R, this Honda ATC acquired little to no enhancements throughout its short-lived manufacturing run. The one notable modifications to the wheeler are the rise in carb dimension (from 31 to 32 mm) and the oil pump improve. The whole lot else in regards to the machine remained untouched. Curiously, it was additionally the one Honda ATC that was not geared up with the Professional-Hyperlink rear suspension discovered on its siblings – a requisite again within the day for Honda racing bikes. As an alternative, its suspension system featured a leading-axle fork versus a trailing-axle design.

Nonetheless, the Honda 350X had some spectacular options – together with practically doubling the displacement of earlier generations of the Large Purple collection. On the skin, it seemed like a three-wheeled UTV stripped off of its cargo racks. It featured elements someplace in the midst of Honda’s top-end and entry-level trikes again within the day, making it an ideal go-to car for leisure riders. All in all, it’s a much-coveted trailer and racing machine, given correct maintenance, efficiency mods, and a talented rider.

1985 – 1986 Honda 350X Specs & Options


An air-cooled, forward-inclined 4-stroke OHC energy mill with an 81 × 68 mm (3.19 × 2.68 inches) bore-stroke ratio, an 8.5:1 compression ratio, and 4-valve-per-cylinder design powers the car. Engine displacement is 350.4 cm3 (21.38 in3) delivered by a 31-mm dual-valve Keihin carburetor. The ATC’s engine configuration lends to its 60 – 65 mph (97 – 105 km/h) prime pace, horsepower of 26.6 hp/27 PS @ 7,000 RPM, and most torque of 29.4 Nm (3.0 kg-m, 21.7 ft-lb) @ 6,000 RPM. Gearing adjustment and porting/sharpening are confirmed to render a top-end ranking of as much as 72 mph (116 km/h) on flats and going downhill. However even after these tweaks, the ATC250R continues to be quicker at 74 mph (119 km/h).

Gas & Lubrication

It has a compelled stress (moist sump) lubrication system with an oiled polyurethane foam air filter like a UNI Stage 2 Air Filter NU-4134ST (view on Amazon). Gas tank capability is 10 L/2.65 US gallons with a 2 L/0.53 US gallon reserve. For prime efficiency, use SAE 10W-40 Honda 4-stroke oil (with out graphite or molybdenum components) or its equal. Relying on ambient temperature, you might also go for SAE 5W, 10W-30, 20W-40, or 20W-50 viscosity grades. Service handbook suggestion is an SE/SF API-certified motor oil (now out of date) – API-grade SJ+ oils assembly JASO T903 MA requirements can be an important various.

(Trivia: For the 1986 Honda 350X, the oil pump was redesigned to deal with points with the engine being starved of oil when performing wheelies or being left in an upright or close-to-vertical place.)


A six-speed fixed mesh return system and a moist, multi-plate clutch meeting ship energy to the bottom. A 520 O-ring chain (with 90 hyperlinks) handles wheel spin, and a rack-and-pinion steering system makes for handy car management and maneuverability. The handbook tranny has a five-up-one-down gearshift sample (1-N-2-3-4-5-6, left foot operation). This powertrain combo makes the Honda 350X worthy of its sport lineage. For riders trying to restore the bike to OEM specs, the inventory gear ratios are beneath:

Major Discount Ratio 2.833 (68/24)
Closing Drive Ratio 3.077 (40/13)
Transmission Gear Ratio (1st) 2.750 (44/16)
Transmission Gear Ratio (2nd) 2.050 (41/20)
Transmission Gear Ratio (3rd) 1.609 (37/23)
Transmission Gear Ratio (4th) 1.308 (34/26)
Transmission Gear Ratio (5th) 1.103 (32/29)
Transmission Gear Ratio (6th) 0.935 (29/31)

Ignition & Lighting

It has a completely transistorized CDI (Capacitor Discharge Ignition) and a major kick-start system. A 13.5 – 14.5V alternator with a rated output of 200 watts @ 5,000 RPM serves because the trike’s charging system, whereas an A.C. generator powers up the lamps and different digital equipment (if any). Ignition timing is 10° BTDC @ 1,400 RPM ± 100 (preliminary “F” mark) and 30° BTDC @ 3,500 RPM ± 200 (full advance). Moreover, the bike requires an NGK DR8ES-L or Nippon Denso X24ESR-U spark plug with a 0.6 – 0.7 mm hole.

Not like present ATVs, this explicit Large Purple doesn’t include a battery. Ought to you’ll want to equip it with one, you first have to wire a regulator/rectifier to it to have DC voltage, allowing the addition of a battery. Guarantee to go away the ignition supply coil out and never join the CDI circuit to the regulator/rectifier, because the latter will get its devoted energy feed from the inventory alternator. While you’re at it, substitute inventory lamps with 12V lighting appropriate with the regulator/rectifier. Go for a YTX12-BS battery (view on Amazon) format after efficiently upgrading the ATC’s electrical elements.

Honda 350X ATC 3 Wheeler

Tires & Brakes

Inventory rubber consists of low-pressure, tubeless 23.5 x 8-11 Ohtsu tires on the entrance and 22 x 10-9 Ohtsu tires on the rear, resulting in the Honda 350X’ comfortability and responsive steering. They mount on rims which can be both ITP metal (91R411) or ITP aluminum (T914110) with a 4/110 bolt sample. Hydraulically operated entrance and rear single disc brakes full the Honda ATC’s tire-and-wheel meeting and lend to its glorious stopping energy.

Really helpful tire stress for the entrance is 27.6 kPa (0.28 kgf/cm2, 4 psi) and 20.6 kPa (0.20 kgf/cm2, 3 psi) for the rear. Maxxis MU02 Zilla Bias Tires (view on Amazon) are among the many prime tire alternative selections by off-roaders and lovers as they work properly with the Honda 350X ATC.


The Honda 350X suspension system incorporates a 203-mm telescopic fork on the entrance and a 194-mm swingarm with remote-reservoir Showa gasoline shocks (rebound and compression damping adjustable) – offering wheel journey of 8.0 inches and seven.6 inches, respectively. Path size is 34.5 mm with a caster angle of 23°. The meeting is barely barely behind the suspension specs of the long-lasting Honda ATC250R and mounts on a semi-double-cradle metal body.

Lovers had hoped the 350X benefited from Honda’s Professional-Hyperlink linkage system and that the producer upgraded the car’s miserly floor clearance of 4.7 inches (120 mm) to match its long-travel suspension. The 4-inch journey peak isn’t essentially a setback for many riders. However those that frequent rock-laden trails and bumpy terrain do discover it unfavorable.


General car dimensions of the 1985 Honda 350X are 74.4 x 43.9 x 42.6 inches (1,890 x 1,115 x 1,082 mm – L x W x H). The size and width have been retained the next 12 months, however the Honda ATC’s peak was diminished by lower than an inch (42.3 inches, 1,075 mm). Seating is simply two inches shy of the perfect peak for giant, tall riders at 29.5 inches (750 millimeters). The 11.4-inch (290 mm) footpeg peak secures the rider in place on the three-wheeler, instilling confidence. Versus its counterparts weighing 490 lbs (222.3 Kg) on common, the three-wheeler is taken into account a light-weight in its class at 320 lbs (145 Kg).


The Honda ATC 350X body includes delicate metal tubing that’s ¾ inch thick (versus the ATC250R’s tubing, which measures 1 1/8 inches). Due to this, the chassis is unsuitable for MX tracks in inventory type and would have to be beefed up for racing functions. Like the remainder of the ATCs within the Large Purple lineup, its plastic physique panels have been made out there in white, blue, or purple with a blue or purple seat cowl. Different commonplace inclusions are entrance and rear fenders, handlebar, hand grips, twin 35-watt headlights, a 5-watt taillight, and a snorkel-like consumption.

Value of a Honda 350X

On the time of its launch, the prompt record worth for the 1985 Honda 350X ATC was $2,248, whereas the 1986 Honda 350X was $2,498. In base type, a secondhand unit would typically price from $360 to $2,795. For the reason that collection solely had two fashions and no trims, fluctuations in present retail pricing would depend upon any efficiency upgrades or every other options added.

Restoring a 350X to showroom situation would price at the least $2,700 to $3,200 (on prime of its resale worth). These beneath $500 often promote for elements. Conversely, trikes value $2,000 or greater are uncommon finds – typically in good working situation and minimal beauty harm.

Bringing Again the King

Honda ATC350X 3 Wheeler

With off-roading classics just like the Honda 350X, there are solely two routes for lovers – a venture construct that transforms the aged bike into showroom situation or a full restomod that takes each riders and onlookers down reminiscence lane. Though removed from cheap, both is an endeavor that’s troublesome to rebuff, as it could imply seeing an all-new 350X within the flesh. If you’re prepared to tackle the problem, right here are some things entailed within the venture:

Gusseting & Powder Coating

The Honda 350X’s delicate metal tubing is the first purpose most riders deem it unsuitable for the monitor. Therefore, it is a superb concept to strengthen the body with gusset kits, even if you happen to solely use it for path using. Bear in mind to switch all inventory bearings with new ones to stop the chassis from wobbling unnecessarily. Lastly, give the machine a superb powder coating as soon as the body is repaired and absolutely bolstered for a clear, polished look.

Suspension Improve

Just like different Honda ATCs, valve emulators finest improve the 350X inventory suspension. As a result of valve emulators completely mimic the operate of a cartridge fork, they permit unbiased tuning of compression and rebound circuits (with the assistance of stiffer fork springs). Getting high-flow valve pistons additional improves the machine’s dealing with traits and bottoming resistance. Swapping out the inventory rear suspension for a Chromoly swingarm can also be strongly beneficial however not essentially required.

Enhance in Energy

Whereas the ability output of the 350X isn’t thought-about conservative, many homeowners discover the inventory head pipe to be limiting. That stated, most of them go for high-performance aftermarket Honda 350X elements to switch OEM ones lower than snuff. Conversely, others select professionally modified exhaust methods to open up the car’s consumption and broaden its powerband – along with having customized valving and cylinder porting executed. Properly-known racing outfitters like CT Racing focuses on venture builds and might help out along with your wants – barring finances restrictions.

Pimped Up Styling

Aftermarket polypropylene plastics are in abundance these days – and shoppers couldn’t be happier. These plastics make bodywork repairs simpler, finally respiratory new life to classic wheelers. In addition they enhance the aggressiveness of the ATC, particularly when paired with racy handguards, body-matching tank shrouds, DG Performance Nerf Bars (view on Amazon), Chromoly footpegs, Pro Taper 7/8 handlebars (view on Amazon), and decals.

Generally, modifications to the inventory tire-and-wheel meeting (as an illustration, buying and selling the unique brakes for steel-braided brake strains or going for billet-center bead lock wheels) are executed for beauty functions greater than operate. Right now, quite a few choices exist, offering a wide selection of fitment and line coloration choices and permitting 350X homeowners to personalize their wheelers.

About Honda

All nice issues start with an important idea – and the story of Honda Motor Firm Ltd. is not any completely different. Based in 1946, former mechanic Soichiro Honda started producing surplus engines and motorized bicycles and grew his firm to the automotive market chief that it’s as we speak. Honda maintains its sturdy presence within the motorbike and ATV industries and even in Formulation 1 racing circuits. Moreover, its armada of product choices displays the corporate’s ardour, strife for excellence, and dedication to bettering folks’s lives via mobility developments.

Conclusion – Honda 350X ATC Assessment

Regardless of incomes the “demise cellular” moniker, the Honda 350X is secure to journey, offered you already know what you might be doing. Its suspension system is usually a downside, however that doesn’t make energy slides much less enjoyable on this three-wheeler. If something, it makes the 350X a tougher and equally rewarding construct venture. Flaws apart, this machine has confirmed itself second to none – even when pitted in opposition to present 350-cc quads. Finally, selecting to journey this revered three-wheeler entails doing so with a grain of salt – it’s, in spite of everything, an off-roading legend.

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