Yamaha SRX 120R Specs and Review [Video]


The Yamaha SRX 120R is a popular kid-sized snowmobile powered by a tiny 123cc, 4-stroke engine. Just like its sister, the Arctic Cat ZR120, and the rival Polaris Indy 120, this tiny Yamaha became instantly popular among the smallest riders.

If you are looking for a Yamaha SRX 120R review, you are in the right place. We at PowerSportsGuide have compiled the specs and all the key info about this sled under one roof!

Yamaha SRX 120R Review

At first glance, the Yamaha SRX 120R looks like a cute youth sled, but it’s not at all a toy!

Instead, it’s a miniaturized Yamaha snowmobile that handles like any full-sized model. However, its moderate performance made it a perfect choice for the smallest riders.

Yamaha only recommends this sled for responsible children who are at least 6 years old. Besides this age limit, children must be under adult supervision when riding the sled.

The power source of the SRX 120R snowmobile is an air-cooled, 4-stroke, single-cylinder engine that features a Mikuni BV18 carburetor. Thanks to this power mill, the top speed of the sled is a (limited) 8 mph.

Besides its smooth-running engine, other features are designed for easy operation as well.

This sled comes with a double-wishbone front suspension system with hydraulic shocks that offer a travel of 3 inches.

What’s more, the torsion spring rear suspension system not only offers a travel of 4.5 inches, but it is also adjustable in 3 different positions based on the height of the child. Therefore, parents can set the seat higher if needed, so the sled can grow with the kid!

Thanks to these advanced and well-designed suspension systems, the SXR 120R offers a comfortable ride even on rough surfaces.

This tiny sled is propelled by a 10″ x 68″ x 0.69″ Camso Cobra track for a great grip. To minimize counter-steering in the corners and maximize traction, this track has a custom lug set (0.69 in./17.5 mm high) but otherwise this track features the same construction as its full-sized brothers.

The small but well-padded seat is completed with a rear storage compartment.

Just like the seating position, the handlebar arrangement has also been designed with user-friendly handling in mind.

Regarding design, the SRX 120R definitely has some DNA from the flagship Sidewinder as well as the classic Yamaha blue and white color scheme.

Standard features include a visibility flag, padded handlebar, windshield, head and taillights, grip and thumb warmers, as well as an automatic drive chain tensioner.

For safety reasons, the sled comes with a tether switch, which automatically shuts off the engine and a “speed governor” that artificially limits engine performance.

Yamaha SRX 120R Spec Charts

For your convenience, we’ve compiled the Yamaha SRX 120R specifications into these charts:

Yamaha SRX 120R Engine Specs

Engine type Forced air cooled/4-cycle
Cylinder arrangement 1-cylinder
Engine stroke 4
Cooling system Forced air
Bore x Stroke (“) 2.2 x 1.97
Displacement (cc) 123
Carburetor Mikuni BV18-11-84Z1
Turbocharged No
Valve configuration Overhead
Lubrication Forced splash
Compression Ratio 8.3:1
Starting system Pull start
Gasoline (Recommended) 87 Minimum octane regular unleaded
Engine oil (Recommended) Synthetic 0W-40

Yamaha SRX 120R Dimensions

Length (“) 73
Width (“) 36
Height (“) 34
Ski stance (“) 31
Fuel tank capacity (gal.) 0.45
Crankcase oil capacity 20.3 oz.

Yamaha SRX 120R Weight Chart

Dry Weight (lbs.) 165
Wet Weight (lbs.) 169

Yamaha SRX 120R Track Features

Track style Camso Cobra
Track width 10 in.
Track length 69 in.
Lug height .69 in.
Track tension (Range) 1/4-3/8 in. (6.4-9.5 mm)
Suspension type Slide rail suspension

Yamaha SRX 120R Electric Features

Spark plug type NGK BPR4ES
Spark plug gap 0.028-0.031 in. (0.7-0.8 mm)
Ignition system Transistorized
Ignition timing 24° BTDC @ 3600 RPM
Taillight (LED) (p/n) 8JM-H4710-10
Headlight bulb (p/n) 8ML-H4314-00

Yamaha SRX 120R Features and Accessories

Exhaust 1-valve
Brake system Adjustable band
Headlight Halogen with hi/low beam
Seat capacity 1
Ski material Plastic
Drive chain tensioner Automatic
Air cleaner Semi-Dry Polyurethane Foam Element
Tether Switch  Standard
High Visibility Whip Flag  Standard
Speed Control  Standard
Grip Warmers  Standard
Padded Handle Bar Standard
Low windshield Standard

These charts are for informational purposes only! For exact specifications, please refer to the factory manual.

How Fast is a Yamaha SRX 120R?

The top speed of the Yamaha SRX 120R is (limited) 8 mph. With a bypassed speed governor, the sled tops out at about 13-15 mph on hard-packed snow.

How much is a Yamaha SRX 120R?

The MSRP of the Yamaha SRX 120R is as low as $3,099.

Yamaha SRX 120R Governor Bypass

Many parents want to surprise their kids with some “extra power.” To achieve this, they simply bypass the speed governor on their SXR 120R by mounting a zip tie onto the spring on the throttle cable. But according to MidWestMini, this is not a good idea! Why?

First, this is a safety feature that is there for a good reason. Small children are often irresponsible, so 8 mph is more than fast enough for them on this tiny sled.

Also, this sled’s gearing and chain are designed for lower speeds, so they can’t handle the increased power in the long run.

The governor is intended to restrict the engine speed at about 3,000 RPM, so running it at a higher speed with a bypassed governor may end in excessive engine damage.

Yamaha SRX 120R for Sale

To the greatest delight of many kids, the Yamaha SRX 120R is still available off the shelf. Therefore, if you are looking for a new model, you can’t go wrong by visiting one of Yamaha’s authorized dealerships.

If you’re considering buying a used machine, you can find many great Yamaha SRX 120Rs for sale on Craigslist, eBay, Snowmobilesoup, Snowmobiletrader, Sledswap, and other official snowmobile ad sites.

Also, you may want to visit some Yamaha snowmobile forums and Facebook groups!

Takeaways – FAQs About the Yamaha SRX 120R

What year did the Yamaha SRX 120R come out?

Yamaha revealed the SRX 120 in 1992 and offered it from the 1993 season. This kid snowmobile is marketed under the name of SXR 120R from the 2019 model year.

What size is the Yamaha SRX 120R?

The Yamaha SRX 120R is 73 inches long, 36 inches wide, and 34 inches high, while its ski stance is only 31 inches.

What is the track size of the Yamaha SRX 120R?

The stock track size of the Yamaha SRX 120R is 10″ x 67″ x 0.69″.

How much does a Yamaha SRX 120R weigh?

The dry weight of the Yamaha SRX 120R is 165 pounds, while its wet weight is only 169 pounds.

What kind of engine is in a Yamaha SRX 120R?

The Yamaha SRX 120R engine is an air-cooled, 123cc, 4-stroke, single-cylinder power mill.

How fast does a Yamaha SRX 120R go?

A stock Yamaha SRX 120R can go 8 mph, but with a bypassed speed governor it tops out at about 13-15 mph.

What age is the Yamaha SRX 120R snowmobile recommended for?

Yamaha markets the SRX120R for responsible children who are at least 6 years old.

References:

Yamaha Motorsport – SRX120

Midwest Mini

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