Koso Big Bore Cylinder Kit — 150 cc — Honda Grom®/Monkey®

In stock

Koso Big Bore Cylinder Kit — 150 cc — Honda Grom®/Monkey®

Koso · #0903-1773 · Top End / Engine

Compression ratio allows the use of premium pump gas and keep the reliabilty of a stock motor
Kit includes aluminum black powder coated cylinder, 54 mm forged piston, rings, pin, pin clips and gasket kit

$498.77

In stock. Ships in 2–4 business days · free shipping over $150.

Questions? Call the shop: 801-361-3010

Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014

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Description & features2 features

Kit Includes:

• Cylinder

• Piston

• Rings

• Pin

• Pin Clips

• Gasket Kit

Compression ratio allows the use of premium pump gas and keep the reliabilty of a stock motor
Kit includes aluminum black powder coated cylinder, 54 mm forged piston, rings, pin, pin clips and gasket kit

Specifications11 specs

Engine Type: 4-Stroke
Riding Style: Street
Color/Finish: Black, Powder-Coated
Compression Ratio: 11.38:1
Style: Big Bore
Material: Aluminum
Units: Kit
Displacement: 149 cc
Shipping weight: 2.6 lb
Package size: 10.3 × 6.8 × 5.5 in
Country of origin: Taiwan

Fitment4 models · Honda

Honda4 models

Grom 1252022
Grom 125 ABS2022
Monkey ABS2022
Z125M Monkey2022

Fitment comes from the catalog data for this part. Double-check your year, model and trim before you order — or call the counter at 801-361-3010 and we’ll check it with you.

Part numbers

Salto part #: 0903-1773
Koso part #: MB640000

Shipping

In stock. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is checked again before your card is charged.

Questions4 answers

Is it in stock?: Yes — it’s in stock right now. We check again the moment you order, before anything is charged.
How fast will it get to me?: Usually 2–4 business days by ground.
Will it fit my machine?: It’s listed for the models in the Fitment section above. Not sure about your trim or year? Call the counter at 801-361-3010 and we’ll check it with you.
Is this genuine Koso?: Yes. It’s new and genuine, straight from Salto — Koso part #MB640000.