It's made by Wiseco, but the Yoshimuraversion has a different Valve recess.
There is a price difference, but it is actually not that much because it also comes with a Head Gasket with a special bore.
It may not be expensive.
The accuracy and quality, especially the strength, are proven, and the OEM Piston is at the limit of PistonSpeed.
It will be broken. "Over 9500rpm on the SR500Stroke." I also do
I just did a limit test on Circuit, so you shouldn't normally do something like this.
The weight is almost the same as OEM even though it's 2mm Bore up, so the vibration feeling is the same.
If there is a difficulty, it is that oil rises during cold starting as a characteristic of forging itself.
It blows White smoke as much as 2st until it warms up. It is especially bad in winter.
YOSHIMURA (WISEKO) Piston ring is made in JAPAN and the quality is absolutely perfect.
In the first place, it is inevitable that Oil rises because Clearance is a very wide specification.
I don't know why it's so common to hear about forged oil rising in four-wheeled vehicles, but it's not so common in two-wheeled vehicles.
It is not said in Net. Curious.
The Oil only goes up when cold, so it doesn't eat up as much Oil.
You probably don't eat 10cc's per cold start, so don't worry about it.
The other thing is that the Stock compression ratio is too high. This is a problem.
It is good if it is assumed that ST-1M or ST-2 of High Camshaft is built in at the same time, but in the case of Normal cam
9.It is better to drop it to about 5. If you don't drop it honestly, you'll be fighting with Knocking forever.
If you add about two Base Gaskets, you can drop it. I'm actually doing it.
There is no problem with CamTiming, etc.
The head shape and smoothness of the surface makes the combustion more obvious than the OEM Piston.
It's stable and a very good Piston.
Fits: YAMAHA SR500 All Years [Year], YAMAHA SR400 All Years [Year]
I bought it because there was a smoke spit in 88 Piston's Piston. At first it got lost with Wiseco's Piston. Because the price is nearly double. However, trusted YOSHIMURA is only high, the Instruction Manual is also described in detail, and the number of revolutions and distance during break-in were also stated securely. Of course the power has gone up, and there are not problems at the moment!View Detail
Fits: YAMAHA SR500 All Years [Year], YAMAHA SR400 All Years [Year]
Since the pure piston was almost coming at exchange time, he thought that he would carry out bore up drastically, and it exchanged by Schopp, but the piston has broken at about 4000 km after exchange.
The cause w
It was used for 94 models of SR400.
Since the pure piston was almost coming at exchange time, he thought that he would carry out bore up drastically, and it exchanged by Schopp, but the piston has broken at about 4000 km after exchange.
The cause was because not having equipped with the external muffler and the oil cooler and a carburetor rearranged normal.
After bore up became that it is easy to ride since torque up was carried out substantially and the maximum high speed was also raised.
It is better to be purchased by Kami who considered it, since an external muffler, an oil cooler, and big carburetor Lother are required when carrying out bore up.
since the attachment by Schopp was incidentally 23000 yen only at wages -- by reference -- pleasing .View Detail
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