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Mid-Iowa Quad Riders!!!
I have a 440 in my EX and I'm thinking of buying a Stroker Crank for it. I was wandering what kind of cc's I'll end up at. I know that a 416 stroked is about 440 but I can't find any info on using a 440 piston and sleave...
Any info would be apriciated.....
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i believe ull end up with 465.
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Actually i think it all depends on what mm crank it is. I know Most of TCs cranks, will up the cc by 40cc. So a stock bore is a 440. .120(425cc) over is a 465cc. It may very on the differant cranks, im not sure. But i know thats how TCs are.
09 KTM 450xc
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Talk to Mike at For Dirt Only, 740-967-1078. He stokes his cranks 7 mm, So your 440 will be bumped up to a 493. Everyone I talk to says that his engines rock! :devil I am going with his 463 kit, just because I want to.
2002 KTM 400 EXC, this bike is awsome!
Quads I use to own:
FDO 463ex, Gas Gas 300, Gas Gas 450, Rancher, Yamaha Warrior, ATC Big Red.
If you can't afford to fix it or replace it, don't ask to ride it!
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This is close but you actually figure displacement byOriginally posted by Extremeracer167
Actually i think it all depends on what mm crank it is. I know Most of TCs cranks, will up the cc by 40cc. So a stock bore is a 440. .120(425cc) over is a 465cc. It may very on the differant cranks, im not sure. But i know thats how TCs are.
(bore/2) ^ 2 * 3.14 *(stroke) so actually the bigger the bore the more the stoke is going to increase the displacement.
So a stock bikes bore is 85.0 mm and the stroke is 70.0mm and that would make the displacement be 397.013 cc and say you increase the stroke 7 mm then the displacement jumps from 397.013 cc to 436.715 cc, about a 40 cc difference but with a 90 mm piston and stock stroke the displacement will be 445.095 cc but with a 7mm longer stroke this displacement bumps up to 489.604 a 44.5 cc difference so it isn't much but the bore does matter when figuring the displacement with a different stroke.
Sorry for the long post but I couldn't really explain it any other way.
2001 416EX with Sparks X-6, FCR 39mm, ELKA Triple rates with cans, Burgard +3+1 A-Arms, Elka Linkage with Custom Axis Rear shock, Denton Steering Stabilizer, WISECO 87mm 11:1 with Hotcams Stage II, FDO Heavy Duty Head Studs, WB Rev Box, K&N Air Filter, Cascade Parking Brake Blockoff, AC racing Pro Peg nerfs, Renthal Sprockets, Renthal bars, DG bumper, DG Swing arm Skid, RPM 2+2 axle, speed locknut, Magura Jack Hydraulic Clutch
1988 TRX350R ported by NRPD, ESR TRX5, PWK 38mm A/S, Gibson Long Travel A-Arms, Elka Quad Rate longtravels, Laeger Swinger, ESR reed block
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Willmans Off-road
but i was close right???
09 KTM 450xc
oynot FDO has diferent lenghts he strokes his cranks a 440 with a 6mm stroke will make it a 473 call Mike at FDO he will be more that willing to help you out
SEXWAX, for quick humps!
Ya, it made only a 4.5 cc dif. I was just pointing out that it does make a diff.Originally posted by Extremeracer167
but i was close right???
2001 416EX with Sparks X-6, FCR 39mm, ELKA Triple rates with cans, Burgard +3+1 A-Arms, Elka Linkage with Custom Axis Rear shock, Denton Steering Stabilizer, WISECO 87mm 11:1 with Hotcams Stage II, FDO Heavy Duty Head Studs, WB Rev Box, K&N Air Filter, Cascade Parking Brake Blockoff, AC racing Pro Peg nerfs, Renthal Sprockets, Renthal bars, DG bumper, DG Swing arm Skid, RPM 2+2 axle, speed locknut, Magura Jack Hydraulic Clutch
1988 TRX350R ported by NRPD, ESR TRX5, PWK 38mm A/S, Gibson Long Travel A-Arms, Elka Quad Rate longtravels, Laeger Swinger, ESR reed block
2007 CBR1000RR, Akrapovic Full Race, Comp Werks FE, DynoJet PCIII, ShoGun Sliders
stuper muderator
HUH? I was told that the formula (in lamens termsOriginally posted by gojk
This is close but you actually figure displacement by
(bore/2) ^ 2 * 3.14 *(stroke) so actually the bigger the bore the more the stoke is going to increase the displacement.
So a stock bikes bore is 85.0 mm and the stroke is 70.0mm and that would make the displacement be 397.013 cc and say you increase the stroke 7 mm then the displacement jumps from 397.013 cc to 436.715 cc, about a 40 cc difference but with a 90 mm piston and stock stroke the displacement will be 445.095 cc but with a 7mm longer stroke this displacement bumps up to 489.604 a 44.5 cc difference so it isn't much but the bore does matter when figuring the displacement with a different stroke.
Sorry for the long post but I couldn't really explain it any other way.was
bore x bore x stroke x .0007854. which gives me 397.21605.
Looks like the end numbers are pretty close though, I just
can't seem to read your formula
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He just did some of the math for you already. Isn't math just wonderful.Originally posted by ridinthedunes
HUH? I was told that the formula (in lamens terms
bore x bore x stroke x .0007854. which gives me 397.21605.
Looks like the end numbers are pretty close though, I just
can't seem to read your formula
2002 KTM 400 EXC, this bike is awsome!
Quads I use to own:
FDO 463ex, Gas Gas 300, Gas Gas 450, Rancher, Yamaha Warrior, ATC Big Red.
If you can't afford to fix it or replace it, don't ask to ride it!
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