In warehouse stock

Wiseco Piston Kit — 86.50 mm — Yamaha

Wiseco · #394M08650 · Top End / Engine

Forged from high-silicon alloy for maximum strength and dependability
Wiseco offers a complete range of popular piston models and years for both trail and racing applications
Kit includes piston, rings, circlips and wrist pin

$224.95

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

Description & features3 features

Kit Includes:

• 1x Piston

• 1x Ring Set #3405TD

• 1x Wrist Pin #S277

• 1x Circlip Set #CW18

Forged from high-silicon alloy for maximum strength and dependability
Wiseco offers a complete range of popular piston models and years for both trail and racing applications
Kit includes piston, rings, circlips and wrist pin

Specifications14 specs

Engine Type: 2-Stroke
Piston Diameter: 86.42 mm
Stroke Length: 70.00 mm
Units: Kit
Piston Material: 4032 Aluminum Alloy
Riding Style: Off-Road
Bore - Oversize: +1,50 mm, +1.50 mm
Displacement: 397 cc
Bore Size: 86.50 mm
Model: Forged Series
Skirt Coating: Non-Coated
Shipping weight: 0.95 lb
Package size: 4 × 3.8 × 3.6 in
Country of origin: USA

Fitment2 models · Yamaha

Yamaha2 models

IT4001977–1978
YZ4001977–1978

Fitment comes from the distributor’s catalog. 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 #: 394M08650
Wiseco part #: 394M08650

Shipping

In stock at a distributor warehouse. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is re-checked with the warehouse before your card is charged.

Questions4 answers

Is it in stock?: Yes — the distributor shows it on a shelf at a regional warehouse 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?: The distributor lists it 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 Wiseco?: Yes. It ships new from the same distributors the big online stores buy from — Wiseco part #394M08650.