I read some place that you could use a xr400 headgasket on a 400ex and it raises the compression also.is there a heavy duty stud that is better to use than another I have oil leaking now figure while its apart I should upgrade it
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Member
I read some place that you could use a xr400 headgasket on a 400ex and it raises the compression also.is there a heavy duty stud that is better to use than another I have oil leaking now figure while its apart I should upgrade it
Live To Ride,Ride To Live
The XR gaskets do raise the compression slightly because they are thinner than the EXs. I'm not sure on the exact number though. And GT Thunder HD studs are what you need to fix the stock studs. http://gtthunder.com/Product/01001HeadStuds.html
2002 Ford Ranger (Red, Westin Brush Guard, K&N CAI, Clearance Lights, couple other little things)
2012 RAM Power Wagon (Black, Line X, Weathertech, Cover King, Flowmaster, Tinted, DiabloSport Trinity, Rertro Shop Custom Headlights, Leveled)
2006 450R (MX/Dune/QFMX Machine)
2005 407EX (XC, GNCC, Harescramble Machine, Not much left that's stock, PICS)
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An XR gasket will increase the compression ratio .2. Actually, all 400EX pistons are rated for the XR gasket. So an 11:1 piston with EX gaskets is actually 10.8.
99 416EX
12.5:1, XR400R cam, Ported, FMF Powerbomb header/White Bros. E-Series Slip-on, Hinson clutch, KN/open lid, 40mm FCR tuned for E85, KFX450R front shocks, Works Ultracross Rear.
08 KFX450R
Pro Circuit TI-4 Full system, KN intake, PC V, Hotcams Stg 2
10 Yamaha WR250R
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99 Chevrolet Camaro Z28 M6
H/C/I/N2O All motor = 430rwhp/403rwtq 150shot = 591rwhp/649rwtq 11.4 @ 128 on regular street tires 26mpg
93 Eagle Talon TSI AWD 5spd
Evo3 16, 272 cams, Evo 8 Rods/Pistons, 560cc injectors, 2G MAF, DSMLink @ 17 PSI
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