Gambar diatas adalah seorang pemilik Gz250 yaitu patrick_777 Oklahoma yang share tentang suhu mesin di GZ250 namun sayang saya tidak dapat mengukur panas dari kesemuanya itu di motor saya karena mempunyai alatnya untuk mengechek suhu.. namun banyak hal yang di dapat dengan dia termasuk pemasangan Oil Cooler..
Just got back from about 45 minutes of midle speed parking lot practice and about 5 more minutes to get back home at just over 40 mph. I let the bike sit for about 2 minutes while I went into the kitchen to get the infrared thermometer. I ran it over the bike and got a max of 348° right off the cylinder-head to the exhaust pipes. The first bend of the exhaust averaged about 310° and it got progressively cooler farther down the pipe. The outside of the muffler about 3″ from the tip was around 190° but the black exhaust port in the end was 297 max°.
The rear of the cylinder-head was the second hottest at around 330° and the side was just over 320°. For reference, the oil filler cap was at max 150°; the block, right below the idle screw was only 145°; and the oil filter cover was only about 140° (this is where my pant leg usually rubs while braking).
Thunder 250 diary 