How is the Displacement (cc) of a motor actually figured out, Ive been told bore x stroke, but that always give me a funky number.
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chuck dEEzuL
How is the Displacement (cc) of a motor actually figured out, Ive been told bore x stroke, but that always give me a funky number.
Senior Member
Half of the diameter x half the diameter x 3.14 X the stroke.
My 300 has a (stock) stroke length of 65.5 mm and a (stock) bore size or74 mm sooooo....
74 divided by 2 (=37), times 37, times 3.14 (=4298.66), times 65.5 (=281,562.23 mm cubed) Wich would be 281.56223 cm cubed. You have to divide by 10, 3 times, to get the cm cubed.
Hows that for todays math lesson
Last edited by Red Rooster; 05-08-2002 at 11:40 AM.
Nate, 1987 250R
Need an '86-'87 stock swing arm. Reckless@drenthe.net
chuck dEEzuL
It was great, but I took it one step farther.Check out the next post.
chuck dEEzuL
400ex Stock Bore Calculations
Bore 85
Stroke 70
----------------------------
-----Bore ÷ 2
85 ÷ 2 = 42.5
----------------------------
(Bore ÷ 2) X (Bore ÷ 2) -or- (Bore ÷ 2)²
42.5 X 42.5 = 1806.25
----------------------------
-----(Bore ÷ 2)² X 3.14 -or- (Bore ÷ 2) X (Bore ÷ 2) X PI
1806.25 X 3.14 = 5671.625
----------------------------
-----That X Stroke
5671.625 x 70 = 397013.75mm³
----------------------------
-----Divide 397013.75 by 10, 3 times -or- Move the decimal place to the left 3 times
397013.75 ÷ 10 = 39701.375
39701.375 ÷ 10 = 3970.1375
3970.1375 ÷ 10 = 397.1375
400ex = 397cc's
----------------------------
Further more to make it down to the nitty gritty then...
Bore divide by 2
Sqaure (Bore ÷ 2)
Take (Bore ÷ 2)² and Multiply by 3.14 (PI)
Multiply by Stroke
Divide by 10 3 times or simply move decimal to the left 3 decimal places.
Now that is how you find out your quad placement Ladies & Gentalmen!
I just didnt know the formula.
Formula by: Red Rooster300
Math & Documentation by: zuLi0
http://www.exriders.com
And also it is downloadable if you would like a Copy for yourself.
WFO
Somebody posted a displacement calculator on here on another post. you just type in your bore and stroke and it gave you the cc's!!!!
Speed is 95% rider and 5% bike, better make that 5% count!
2000 TC 505EX Complete TC Motor and everything else you can imagine and more!!
chuck dEEzuL
Where?
Also its interesting to know how to figure it out by hand.
Sick Style ATV Racing
They got one at bluetraxx.com,
http://www.bluetraxx.com/engine_displacement.htm
#71
2000 Roll/Laeger's/Houser/Axis 416ex
2001 Arens/Laeger's/PEP 250r
Thanks to my sponsors for 2003 : 00-Buck ATV Racing, Team Pompton, Nebulae Race Team, Milton Inn Packaged Goods, Napa Auto Parts of Oak Ridge, Sick Style Racing, WD-40, Hinson Racing, IMS, Sport Center Racing, and Nac's racing
I'd also like to give a special thanks to Baldwin Motorsports for all there help and support they gave me.
We are now accepting resumes, this is a New Jersey based team. westsyder50@hotmail.com
http://www.geocities.com/sickstyleatv/index.html
Team Rcokford Fosgate 401+ northeast champ 147.7db
The truth comes out,,Norms a traiter that rides a hopped up blasturd...LOLOriginally posted by 400exRacerX
They got one at bluetraxx.com,
http://www.bluetraxx.com/engine_displacement.htm
Senior Member
You got it good and deep, there, zuLiO. good work.
Nate, 1987 250R
Need an '86-'87 stock swing arm. Reckless@drenthe.net
Sick Style ATV Racing
Originally posted by Rico
The truth comes out,,Norms a traiter that rides a hopped up blasturd...LOL
How'd yah find out???
#71
2000 Roll/Laeger's/Houser/Axis 416ex
2001 Arens/Laeger's/PEP 250r
Thanks to my sponsors for 2003 : 00-Buck ATV Racing, Team Pompton, Nebulae Race Team, Milton Inn Packaged Goods, Napa Auto Parts of Oak Ridge, Sick Style Racing, WD-40, Hinson Racing, IMS, Sport Center Racing, and Nac's racing
I'd also like to give a special thanks to Baldwin Motorsports for all there help and support they gave me.
We are now accepting resumes, this is a New Jersey based team. westsyder50@hotmail.com
http://www.geocities.com/sickstyleatv/index.html
Team Rcokford Fosgate 401+ northeast champ 147.7db
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