What are the benefits of Wiseco forged pistons?
In this video from Partzilla.com, John takes you through the decisions you will need to make when picking forged pistons for your motorcycle, ATV, or UTV. We’ll compare Wiseco pistons with OEM pistons on the Honda CRF450R and a Honda TRX420.
On the CRF450R, John will explain how this unit’s nikasil cylinder prohibits choices for piston size, but not compression. Wiseco offers a range of compression options depending on your performance demands, all the way up to a 14.5:1 on the Wiseco Racer Elite series.
On the TRX420, you'll see how the depth and of the Wiseco piston gives you performance advantages over the OEM piston.
What are the benefits of forged vs. cast pistons? The two biggest are strength and weight, and those two performance edges are intertwined. John will explain the difference in the manufacturing processes for forged vs. cast pistons, which leads to a stronger component produced from the forged method. A stronger piston means that more material can be shaved from the piston, which makes it lighter.
Wiseco piston coating offers another edge. A forged piston is more dense due to the manufacturing process, and that means it takes longer to heat up in the cylinder. Wiseco piston coatings help to keep the piston quiet in the cylinder until the piston expands due to heating, which creates a tight seal inside the cylinder.
So how do you choose a Wiseco piston?
If your engine has a nikasil cylinder wall, part of the choice is made for you: they’ll come in only one size. You can then choose the desired compression, but keep in mind increased compression may require a change in the fuel/air map and may also require a different fuel.
If you have a bored cylinder, your options will revolve around the bore. Talk to your machinist about the desired bore on your cylinder. Wiseco factors in the tolerances when offering their pistons, so your machinist simply has to bore to that given size since Wiseco has considered the variances.
A Wiseco piston from Partzilla.com includes the piston, rings, circlips, and wrist pin, but you can also choose a Wiseco forged piston kit that includes the piston, rings, circlips, and wrist pin as well as the gaskets you'll need to do a top end job.
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