SKU: 8999153431

Zonsen(Zongshen) 250cc OHC Air Cooled Engine For Atomik Thumpstar Dirt Bike Motorbike

Sale price$391.10 Regular price$434.56
Save 10%

Pay in installments of $108.64 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Zonsen(Zongshen) 250cc OHC Air Cooled Engine For Atomik Thumpstar Dirt Bike MotorbikeDescription: Genuine Zonsen(Zongshen) 250CC vertical engine with kick electric start It is a direct bolt on replacement for most Chinese dirt bikes running 200 250cc single cylinder air cooled motors such as Thumpstar, Atomik, DHZ, Foxico, XTM, etc Specifications: Type: 1 cylinder, vertical, 4 stroke, air cooled kick start and electric start OVER HEAD CAM Bore x Stroke: 65mm x 67mm Displacement: 229ml Max. Power & Corresponding Speed: 11. 5KW 7500rpm

Description: 

  • Genuine Zonsen(Zongshen) 250CC vertical engine with kick/electric start
  • It is a direct bolt on replacement for most Chinese dirt bikes running 200-250cc single cylinder air cooled motors such as Thumpstar, Atomik, DHZ, Foxico, XTM, etc

Specifications:

  • Type: 1-cylinder, vertical, 4-stroke, air-cooled kick start and electric start - OVER HEAD CAM
  • Bore x Stroke: 65mm x 67mm
  • Displacement: 229ml
  • Max. Power & Corresponding Speed: 11.5KW/7500rpm
  • Max. Torque & Corresponding Speed: 17.5N.m/5000rpm
  • Min. Fuel Consumption: <367g w.h="" pollutant="" index:="5.5" g/km="" (co),="1.2g/km" (hc)="">
  • Clutch Type: Manual wet clutch
  • Start Mode: kick start and electric start
  • Compression: 9.0:10 
  • Engine Oil: 900ml, 15W/40-SE, 4 stroke
  • Oil GEARS: 5 SPEED MANUAL CLUTCH, 1 down 4 up
  • SPROCKET: 15T 428 CHAIN
  • Dimension: 458 x 358 x 324mm
  • Weight: 35kg

Listing includes: 

  • 1 x ZONGSHEN 250CC VERTICAL ENGINE
  • 1 x Kick Starter Lever
  • 1 x Gear Shift Lever
  • 1 x Manifold set Package
  • Wiring loom harness (option only)
  • Kill switch (option only)
  • Key switch/ 2keys (option only)
  • NGK spark plug (option only)
  • CDI (option only)
  • Coil with lead (option only)
  • Rectifier (option only)
  • Solenoid (option only)
  • JK PZ30 carby (outlet diameter: 30mm, bolt eye-eye: 48mm, bolt diameter: 6.5mm) (option only)
  • air filter 42mm (may vary depending on stock availability)(option only)

Important note:

  • Zongshen has rebranded to Zonsen — it's the same company under a new name. The engine you will receive may bear the marking or logo of either ZONGSHEN or ZONSEN, or it may not have any logo at all.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 8999153431

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.5 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
E
Verified Purchase
Edward A. Cleveland
Omaha, US
★★★★★ 5
Step In Look Good
Size: 11.5, Color: Cognac Napa Leather
I am wearing these shoes as I write this review, and they look and feel great. I have a bit of a disability with drop foot on the right leg and bilateral neuropathy and have been wearing step in shoes for about 10 years. But the first company that introduced leather dress and casual shoes stopped making them and now only makes sport and casual shoes. So I have been searching for some that meet my need for shoes like this and this company has given me three pairs, so far. Easy to get into, comfortable to wear, and good looking. And they take polish very well, too. (Remember how to do that?). We may buy another pair or two in different styles as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
B
Verified Purchase
Book dude
Louisville, US
★★★★★ 4
Runs tight. Skinny and smaller than other brands.
Size: 8.5, Color: Brown
Comfy and lots of support. Cushiony. Beware: the brown I ordered runs small. Tighter than other brands.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
L
Verified Purchase
Loren
Port Orchard, US
★★★★★ 5
Right Decision
Size: 12 Wide, Color: Cognac Napa Leather
Very comfortable. Classic style.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
Y
Verified Purchase
YWC
Omaha, US
★★★★★ 1
Leather peels right off
Size: 8, Color: Black
Very poor quality - shoes are ruined after a couple months
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
B
Verified Purchase
Blackqueen30
Omaha, US
★★★★★ 5
Good purchase
Size: 9.5, Color: Black
Value and quality was good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026

recommand products