Home Polaris Trail Boss 250 Namura .040 Over Bore Piston 73mm (1985–1999)

Polaris Trail Boss 250 Namura .040 Over Bore Piston 73mm (1985–1999)

NOW $235.00
Or 4 interest-free payments of $58.75
In stock at 1 of our locations
🚛 Free NZ shipping
🔒 12 month warranty on all parts
NZ WOF compliant
🔧 Fitting available NZ wide

Description:
Overbore piston designed for 1985-1999 Polaris Trail Boss 250 engines,
providing slight displacement increase for improved compression and
reliable performance during rebuilds. Made to fit OEM specifications
for dependable seating and operation.

Features:
- Specifically for Polaris Trail Boss 250 (1985-1999)
- .040 overbore, 73mm piston
- Maintains proper clearance and reliability

Includes:
1 x Namura .040 Over Bore Piston 73mm for Polaris Trail Boss 250

Fits Models:
Polaris Trail Boss 250

Model Years:
1985 - 1999

Submodels:
Trail Boss 250

Engine Options:
250cc 4-stroke single

Namura .040 Bore Piston 73mm for Polaris Trail Boss 250 (1985-1999)

Namura piston, Polaris Trail Boss 250, 73mm piston, overbore, ATV engine parts

Shipping Information

Most orders land in 5–12 business days. We'll keep you updated at every step of the journey.


The Kren Bits journey:

  • Order received — Day 0
  • With fulfilment — Day 1–2
  • Heading to courier — Day 2–4
  • Shipped — Day 3–7
  • Almost there — Day 5–10
  • Delivered — Day 5–14

Where your part ships from:

Your order ships from the closest warehouse with available stock across our six-warehouse network — NZ, AU, TH, UK, US, and CN.


We email you at every real milestone — order received, with fulfilment, heading to courier, shipped, almost there, delivered. No chasing, no vague waits.


For more details, visit our Track Your Order page.

Product Enquiry

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