Koso North America 4V Head Kit w/ 170cc Big Bore kit MB623003 HONDA Grom 125

£720.43 Buy It Now, £91.81 Shipping, 30-Day Returns, eBay Money Back Guarantee
Seller: oemcycles ✉️ (534,176) 98.7%, Location: Loudon, Tennessee, US, Ships to: WORLDWIDE, Item: 335288974658 Koso North America 4V Head Kit w/ 170cc Big Bore kit MB623003 HONDA Grom 125. When ordering from the US, parcels may be subject to import tax and duty charges, which the buyer is responsible to pay.

Koso North America 4V Head Kit w/ 170cc Big Bore kit MB623003 HONDA Grom 125 This product data sheet is originally written in English.

Authorized Koso North America Dealer

Koso North America 170cc Big Bore Kit with 4 Valve Cylinder Head

This item fits the following models:

Honda  MSX125 Grom  2020 
Honda  MSX125 Grom  2019 
Honda  MSX125 Grom  2018 
Honda  MSX125 Grom  2017 
Honda  MSX125 Grom  2016 
Honda  MSX125 Grom  2015 
Honda  MSX125 Grom  2014 
Honda  MSX125 Grom  2013 
Honda  Z125 Monkey  2020 
Honda  Z125 Monkey  2019 

Type :   Head Kit
Style :   Big Bore
Material :   Stainless Steel
Sold as :   Kit
  • This complete 170cc Big Bore kit with 4V Cylinder Head kit is the perfect add‑on for all horsepower enthusiast looking for performance! It includes : a 170cc ceramic coated cylinder, forged piston, performance camshaft, bearing, rocker arms, 4 valve cylinder head, intake manifold, gaskets, and more. All parts are made from High‑quality components for reliability and durability that allow you to put your mind at ease and ride with confidence!
  • WARNING: THIS IS AN AFTERMARKET PART BUILT FOR RACING PURPOSES ONLY. KOSO IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION.


Local pickups are welcome! Please contact us to make sure your order is available for local pickup as some items are stored in and ship from fulfillment centers. Our store is open 10:00am - 6:00 pm eastern time Monday through Friday and located at 905 Mulberry St, Loudon, TN 37774

Got questions? click the contact seller link at top of this page or give us a call toll free.


Return Policy
  • We must be notified within 24 hours of receipt of any missing, defective or damaged goods.
  • All returned items must be in original, non-modified, undamaged packaging. We will not accept returns with damaged, modified (including writing or marks) or missing packaging.
  • All returned items must be in new condition with all documentation, tags, etc intact.
  • Any item which has been used, worn, damaged or had tags/labels removed will not be eligible for return.
  • Any damage claims may be exchanged for the identical item only.
  • No refunds on damage claims, replacement with identical item only.
  • Returned items must be received by us no later than 10 Days.
  • It will be the sole discretion of oemcycle to provide refund, replacement, or return item without refund.
This complete 170cc Big Bore kit with 4V Cylinder Head kit is the perfect add‑on for all horsepower enthusiast looking for performance! It includes : a 170cc ceramic coated cylinder, forged piston, performance camshaft, bearing, rocker arms, 4 valve cylinder head, intake manifold, gaskets, and more. All parts are made from High‑quality components for reliability and durability that allow you to put your mind at ease and ride with confidence! WARNING: THIS IS AN AFTERMARKET PART BUILT FOR RACING PURPOSES ONLY. KOSO IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION. All returned items must be in original, non-modified, undamaged packaging. We will n
Interchange Part Number MB623003
MPN MB623003
Type Head Kit
Brand Koso North America
Manufacturer Part Number MB623003
Part Type Head Kit
Model MSX125 Grom, Z125 Monkey
OE/OEM Part Number MB623003
Make Honda
Superseded Part Number MB623003
  • Condition: New
  • Interchange Part Number: MB623003
  • MPN: MB623003
  • Type: Head Kit
  • Brand: Koso North America
  • Manufacturer Part Number: MB623003
  • Part Type: Head Kit
  • OE/OEM Part Number: MB623003
  • Superseded Part Number: MB623003

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  •  Popularity - 1 watcher, 0.0 new watchers per day, 24 days for sale on eBay. Normal amount watching. 0 sold, 4 available.
  •  Best Price -
  •  Seller - 534,176+ items sold. 1.3% negative feedback. Great seller with very good positive feedback and over 50 ratings.

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