Thumpstar - TSK 90cc S4 Dirt Bike


$1,599.00 MSRP
Crate Price | Ride Away + $300 MSRP
- To a Toll Depot nearest to you - $199.00
- To a Business Address - $199.00
- Pickup in Bayswater, Perth - FREE
- To Door - Pricing By Zone
- Zone 1-3 - $290
- Zone 4-5 - $260
- Zone 6-9 - $370
- Zone 10 - $1,280
- *If your post code is not on our list, You may only choose depot shipping
Database
Description
Small, compact, yet simple 90cc
We've listened to years of feedback on our best-selling kids' bike, and we're excited to introduce the revamped TSK90, which takes an already awesome package for junior riders to the next level.
Firstly, we've given it a fresh look with our new mini stealth plastics, making it slick and appealing to both kids and adults while matching our bike lineup. But the real magic lies under the hood. We've replaced the fully automatic engine with a new semi-automatic one, added both electric and kick start options, and boosted its power, making it suitable for heavier junior riders.
Safety is paramount for kids, so we've added an emergency lanyard to kill the engine in case of a fall. Plus, with the adjustable throttle limiter, parents have full control over the bike's speed. The TSK90 is not just a kids' bike; it's a safer, more powerful, and cooler ride for the next generation of riders.

Kill Switch and Lanyard
Safety is an important feature for kids just starting out and parents who are supervising. The TSK90 comes equipped with an emergency lanyard which can be attached to your child's wrist and will instantly kill the bike should they come off.
Adjustable throttle
Parental control is a must on any motor bike where a child is just starting out and learning how to ride. We here at Thumpstar have tailored the TSK 90 to those junior riders who are learning, and given you the parent or teacher full control over your child's bike, with an easily adjustable throttle limiter, the speed and power delivery of the bike can be easily limited.


Waterproof Wiring
Building a bike that will last has been a main focus of ours since the beginning. This means we have to produce a motorcycle that will stand the test of time and exposure to the elements. We have given the TSK 90 the same waterproof wiring system that its bigger brothers, the TSX125 and TSX140, have.
Wrap Around Frame
Traditional mini bikes produced by our competitors have a CRF50 style frame. We went back to the drawing board and applied our knowledge from larger, heavier duty bikes. The new TSK90 frame is what we call a wrap-around frame where the swing arm sits between it and the engine, which reduces stress on the bearings and gives the overall system better strength.


Disc Brakes
Something more important than the power to go fast is stopping power. The TSK90 is well suited for this. With oversized front and rear disc brakes, it has more than enough stopping power to go from fast to stop in the blink of an eye.
Stator Guard
Rider protection is a feature that we take into consideration when producing any bike. We redesigned our stator guard firstly to protect the rider from any sort of chain grab around the foot, but also to protect the engine should the chain or sprocket malfunction and let go.


New Plastics Stripe Seat
The TSC110 has had a bit of revamp on many levels, we thought since our mid and full size bikes were getting new skins, the TSC110 shouldn't be left out. It has received the full stealth plastics kit accompanied by our new gripper striped seat, giving a sleek and stealthy new look.
26mm carb
Reliability comes with using trusted brands of parts. The TSC110 now includes a 26mm carburetor, which allows us to faithfully say that the performance and reliability of these bikes have been greatly improved on from previous models.


Header and Exhaust
Pipe Bomb 2.0 head pipe
A redesigned frame came with requirements for a new exhaust header. The new Pipe Bomb 2.0 head pipe from Thumpstar allows exhaust gasses to expand, cool, and ramp back up at a higher velocity when exiting. This results in a greater bottom, and low-end response while keeping the tuning in check for the top end.
GoPro Mount
Carry Box
Don't let your off-road experiences go undocumented. With the GoPro DirtBike Mount, you can capture every twist, turn, and jump in stunning HD quality, allowing you to relive your adrenaline-fueled moments again and again. Gear up and take your footage to the next level!


V5 Front Plate
Stylish protection for your ride. Upgrade your bike's look and shield vital components today!
Specifications
ENGINE & TRANSMISSION | |
Engine | FH | 4 Stroke |
CC Rating | 90cc |
Gearbox | N1234 |
Starter | Kick/Electric Start |
Carburetion | PZ 19mm |
Exhaust | Pipe Bomb DW2 | 28mm | Header Bomb |
Final Drive | 420 Chain |
Top Speed | 45kph/28mph (depending on gearing) |
SUSPENSION, BRAKES, & WHEELS | |
Suspension Front | Inverted | Length 600mm Non-Adj |
Suspension Rear | Non-Adj | 280mm |
Brakes Front | Disc | Single Piston |
Brakes Rear | Disc | Single Piston |
Wheel & Tire Front | Steel Rim | 1.40-12 |
Wheel & Tire Rear | Steel Rim | 1.85-10 |
DIMENSIONS & WEIGHT | |
Wheelbase (axle to axle) | 1120mm | 44” |
Seat Height | 680mm | 27” |
Product Weight N.W | G.W | 50/60kg | 143/165lbs |
Tank Capacity | 3 Litres | .80 gallon |
Product Packing Size | 1230x390x650 | .31 m3 |
No Reviews!
Paypal
You can send your payment here: https://paypal.me/thumpstar
Afterpay - Shop now, Pay Later
Click this link for Afterpay: Afterpay
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
Parts
To order parts please visit Thumpstar international parts ordering website parts.thumpstar.com.au
Notes
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
We DO NOT Ship Thumpstar Motorcycles outside of New Zealand or Australia
Email us at support@thumpstar.com.au if you have any questions.
About Our Company
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
Small, compact, yet simple 90cc
We've listened to years of feedback on our best-selling kids' bike, and we're excited to introduce the revamped TSK90, which takes an already awesome package for junior riders to the next level.
Firstly, we've given it a fresh look with our new mini stealth plastics, making it slick and appealing to both kids and adults while matching our bike lineup. But the real magic lies under the hood. We've replaced the fully automatic engine with a new semi-automatic one, added both electric and kick start options, and boosted its power, making it suitable for heavier junior riders.
Safety is paramount for kids, so we've added an emergency lanyard to kill the engine in case of a fall. Plus, with the adjustable throttle limiter, parents have full control over the bike's speed. The TSK90 is not just a kids' bike; it's a safer, more powerful, and cooler ride for the next generation of riders.

Kill Switch and Lanyard
Safety is an important feature for kids just starting out and parents who are supervising. The TSK90 comes equipped with an emergency lanyard which can be attached to your child's wrist and will instantly kill the bike should they come off.
Adjustable throttle
Parental control is a must on any motor bike where a child is just starting out and learning how to ride. We here at Thumpstar have tailored the TSK 90 to those junior riders who are learning, and given you the parent or teacher full control over your child's bike, with an easily adjustable throttle limiter, the speed and power delivery of the bike can be easily limited.


Waterproof Wiring
Building a bike that will last has been a main focus of ours since the beginning. This means we have to produce a motorcycle that will stand the test of time and exposure to the elements. We have given the TSK 90 the same waterproof wiring system that its bigger brothers, the TSX125 and TSX140, have.
Wrap Around Frame
Traditional mini bikes produced by our competitors have a CRF50 style frame. We went back to the drawing board and applied our knowledge from larger, heavier duty bikes. The new TSK90 frame is what we call a wrap-around frame where the swing arm sits between it and the engine, which reduces stress on the bearings and gives the overall system better strength.


Disc Brakes
Something more important than the power to go fast is stopping power. The TSK90 is well suited for this. With oversized front and rear disc brakes, it has more than enough stopping power to go from fast to stop in the blink of an eye.
Stator Guard
Rider protection is a feature that we take into consideration when producing any bike. We redesigned our stator guard firstly to protect the rider from any sort of chain grab around the foot, but also to protect the engine should the chain or sprocket malfunction and let go.


New Plastics Stripe Seat
The TSC110 has had a bit of revamp on many levels, we thought since our mid and full size bikes were getting new skins, the TSC110 shouldn't be left out. It has received the full stealth plastics kit accompanied by our new gripper striped seat, giving a sleek and stealthy new look.
26mm carb
Reliability comes with using trusted brands of parts. The TSC110 now includes a 26mm carburetor, which allows us to faithfully say that the performance and reliability of these bikes have been greatly improved on from previous models.


Header and Exhaust
Pipe Bomb 2.0 head pipe
A redesigned frame came with requirements for a new exhaust header. The new Pipe Bomb 2.0 head pipe from Thumpstar allows exhaust gasses to expand, cool, and ramp back up at a higher velocity when exiting. This results in a greater bottom, and low-end response while keeping the tuning in check for the top end.
GoPro Mount
Carry Box
Don't let your off-road experiences go undocumented. With the GoPro DirtBike Mount, you can capture every twist, turn, and jump in stunning HD quality, allowing you to relive your adrenaline-fueled moments again and again. Gear up and take your footage to the next level!


V5 Front Plate
Stylish protection for your ride. Upgrade your bike's look and shield vital components today!
Specifications
ENGINE & TRANSMISSION | |
Engine | FH | 4 Stroke |
CC Rating | 90cc |
Gearbox | N1234 |
Starter | Kick/Electric Start |
Carburetion | PZ 19mm |
Exhaust | Pipe Bomb DW2 | 28mm | Header Bomb |
Final Drive | 420 Chain |
Top Speed | 45kph/28mph (depending on gearing) |
SUSPENSION, BRAKES, & WHEELS | |
Suspension Front | Inverted | Length 600mm Non-Adj |
Suspension Rear | Non-Adj | 280mm |
Brakes Front | Disc | Single Piston |
Brakes Rear | Disc | Single Piston |
Wheel & Tire Front | Steel Rim | 1.40-12 |
Wheel & Tire Rear | Steel Rim | 1.85-10 |
DIMENSIONS & WEIGHT | |
Wheelbase (axle to axle) | 1120mm | 44” |
Seat Height | 680mm | 27” |
Product Weight N.W | G.W | 50/60kg | 143/165lbs |
Tank Capacity | 3 Litres | .80 gallon |
Product Packing Size | 1230x390x650 | .31 m3 |
No Reviews!
Paypal
You can send your payment here: https://paypal.me/thumpstar
Afterpay - Shop now, Pay Later
Click this link for Afterpay: Afterpay
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
Parts
To order parts please visit Thumpstar international parts ordering website parts.thumpstar.com.au
Notes
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
We DO NOT Ship Thumpstar Motorcycles outside of New Zealand or Australia
Email us at support@thumpstar.com.au if you have any questions.
About Our Company
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