✦ Ground shipping $14.95 — free over $150✦ Live stock — re-checked when you pay✦ Real prices, no dealer markup games✦ Questions answered by a human: 801-361-3010✦ Licensed Utah dealer № 140069✦ Ground shipping $14.95 — free over $150✦ Live stock — re-checked when you pay✦ Real prices, no dealer markup games✦ Questions answered by a human: 801-361-3010✦ Licensed Utah dealer № 140069

Shop › Engine & Drivetrain › Engine

In stock

Koso Big Bore Kit 150cc Honda

Koso · #27-5937 · Engine

Includes a ceramic coated cylinder, 61mm forged piston, rings, pin, pin clips, gasket kit, and banjo bolts
Compression ratio of 11.5 to 1 allows the use of premium pump gas to keep the reliability of the stock motor

$503.17MSRP $532.46

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

Includes a ceramic coated cylinder, 61mm forged piston, rings, pin, pin clips, gasket kit, and banjo bolts
Compression ratio of 11.5 to 1 allows the use of premium pump gas to keep the reliability of the stock motor

Specifications2 specs

Shipping weight: 6 lb
Package size: 9.3 × 6.5 × 6.8 in

Part numbers

Salto part #: 27-5937
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?: There’s no published vehicle fitment list for this part. Call the counter at 801-361-3010 with your year, make and model and we’ll check it with you before you order.
Is this genuine Koso?: Yes. It’s new and genuine, straight from Salto — Koso part #MB640000.