03 9344 1564 | support@thumpstar.com.au
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Thumpstar - MX 50cc SR

$2,599.00 [Crate Price]
or 6 weekly interest-free payments of $433.16 Laybuy What's this?


Currently in Research and Development

Bring back the 2-strokes! For the past year, we have been conducting research and development of one of our most exciting projects yet! The Thumpstar MX line of bikes. Looking forward to 2020 will be releasing our first race ready line of 50cc two strokes which will stack up and compete, without the worry of a heavy price tag when your jr racers are just starting out. Our design and development team has put together the ultimate 2-stroke 50cc package which efficiently delivers sufficient power to compete with the other race ready bikes in the mini class. At the heart of the bike sits a 49 cc, 1-cylinder, 2-stroke, water-cooled engine with reed intake that produces impressive power out of the box. The centrifugal automatic clutch provides manageable acceleration and makes learning to ride a breeze.

MX50SR Forks

Fastace Adjustable forks with Progressive Springs


Top of the line Fastace suspension provides a fully adjustable and responsive package which gives the rider full feel and control of the bike through ruts, over bumps, up takeoffs, and down landings.



The Henly CNC hubs are made from 1 piece billet alloy on precision CNC machines, and are anodized to provide wear resistance and provide you with a heavy duty package which will stand against the test of time.

MX50SR Stainless Spoke

7075 Rims w/ Stainless Spokes


Henly designed 10/12” wheels with anodized red hubs mean that the bike is not only a killer with looks, but also provide extreme durability. The rims are made of 7075 series alloy and are used by almost all top riders. Henly rims keep on being the best, strongest and most reliable rim we can provide. Stainless steel spokes prevent stretching and snapping which is a common issue with other types of steel spokes.

1 1/8 Fat Bars


The design of the MX Steeze handlebar is aimed at reducing weight whilst maintaining high strength. Strength for the bar is created within the tapered wall profile allowing for a braceless design. This enables a confident level of flexibility in the handlebar. Millions of tiny steel shots are blasted at high velocity at the bar, breaking the surface tension of the material and leaving a textured surface finish which increases the fatigue life and durability of the bar.

MX50SR Fat Bars

Free Spare Parts Kit

Thumpstar Free Spare Parts Kit

Product Packaging

Pitbike Assembly & Servicing


Engine 1-Cylinder, 2-Stroke Engine
Displacement 49 cm³
Bore 39.5 mm
Stroke 40 mm
Starter Kickstart
Transmission Single-Speed Automatic
Primary Drive 61:33
Secondary Gear Ratio 11:40
Clutch Centrifugal Clutch
Frame Design Central-Tube Frame with Double-Cradle
Suspension Front VS1 upside-down Ø 35 mm / 205 mm
Suspension Rear VS1 Shock Absorber / 185 mm
Brakes Front Disc Brake / 160 mm
Brakes Rear Disc Brake / 160 mm
Steering Head Angle 66 °
Wheelbase (axle to axle) 1032 ± 10 mm
Ground Clearance 252 mm
Seat Height 684 mm
Tank Capacity 2.3 Litres
Weight (Without Fuel) 41.5 kg


You can send your payment here: http://paypal.me/thumpstar

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Credit cards & Debit cards (Will require a photo of a ID card for all paypal and credit card purchases): We accept Paypal, Visa, Master Card payments through our website. Our checkout pages are encrypted using SSL, Credit Cards are verified in real time using Paypal and checked again via Riskified to ensure maximum security.

Online Banking: Payments can be made by direct credit bank transfers. Simply Checkout, and click bank deposit option, you will then be emailed an invoice, remember to use your order number as a reference. Order over the Phone: To make an order over the phone, simply call 03 9344 1564 International +61 0393 44 1564 to speak with one of our friendly customer service team. They can email you an invoice directly and will be able to help you with any questions you may have, as well as placing orders over the phone.

We have ANZ and Commonwealth Bank Accounts for direct deposits.

Motorcycle Shipping

To purchase a Thumpstar Motorcycle or Engine you can order here direct, we are based in Perth, Western Australia, we offer freight Australia Wide to Startrack Depot or Business Address.

As soon as your order is confirmed you will receive a confirmation, then expect your tracking number within 2 days time.

Thumpstar Australia Contact Details,

  • Thumpstar Australia Dealer #26768
  • +61 3 9344 1564
  • support@thumpstar.com.au
  • 3 Barnett Court,
  • Morley, WA 6062,
  • Australia


To order parts please visit Thumpstar international parts ordering website parts.thumpstar.com.au


    If you are in Perth you are welcome to visit Thumpstar Australia’s Shop – No Limits Moto, they have a full range of parts and motorcycles on display. Can also order parts over the phone direct from them by calling - 08 9276 1330


    Email us at support@thumpstar.com.au if you have any questions.


    Genuine Thumpstar the original mini bike brand that started in Australia back in 2004, we have extensive knowledge on all mini bike related inquiries..

    Help Ordering

    If you are unsure on ordering a part, we recommend watching our Youtube video under Info/Video tab or visiting our workshop section, if you still need help then please contact us,

    Phone: +61 3 9344 1564

    Email: support@thumpstar.com.au

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