167FMM mods - Page 2

Mudflap · 07-22-2021, 11:01 AM

It's good to have oil temps over 212° f so any moisture boils off.

Thumper · 02-15-2023, 06:28 PM

Everywhere I have looked, I hear 65mm stroke for this engine. So if the cylinder is 67mm:

Use the Spicer engine displacement calculator or equivalent to determine true displacement:

https://spicerparts.com/calculators/...ent-calculator
67mm bore x 65mm stroke = 229.17

Megadan · 02-15-2023, 06:45 PM

Quote:

Originally Posted by Thumper

Everywhere I have looked, I hear 65mm stroke for this engine. So if the cylinder is 67mm:

Use the Spicer engine displacement calculator or equivalent to determine true displacement:

https://spicerparts.com/calculators/...ent-calculator
67mm bore x 65mm stroke = 229.17

Yes. That is known to most of us. A 70mm bore makes it as close to a true 250 as you get. It's just like the 200cc GY6 scooter engines are 168cc. Just marketing bullhooey

02-15-2023, 06:28 PM	#17
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,432	displacement Everywhere I have looked, I hear 65mm stroke for this engine. So if the cylinder is 67mm: Use the Spicer engine displacement calculator or equivalent to determine true displacement: https://spicerparts.com/calculators/...ent-calculator 67mm bore x 65mm stroke = 229.17 __________________ -2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it
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07-22-2021, 11:01 AM	#16
Mudflap Join Date: Sep 2014 Posts: 1,894	It's good to have oil temps over 212° f so any moisture boils off.
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