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08-05-2011, 08:03 PM
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Junior Member
My Ride: 05 400ex
Feedback Score: 0 reviews
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My ATV: 05 400ex
Member #1666
Join Date: Aug 2011
Location: decatur IL
Posts: 1
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05 400ex 416 0r 426
i have recently been looking to bore my 400 out but i cant decide 416 or 426 cause i race flattrack and tt and i put a stage 2 hotcam in it which gave it quite a bit of power but i need a little more and i was thinking the 426 would be good but i dont want it 2 overheat or have to get better valves cause i still trail ride just wondering if anybody has had one and liked it or had troubles thanks
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08-05-2011, 08:38 PM
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Senior Member
My Ride: 07 TRX450ER/07 Grizzly700
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My ATV: 07 TRX450ER/07 Grizzly700
Member #17
Join Date: May 2009
Location: Southaven.Ms
Posts: 330
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Thanked 27 Times in 24 Posts
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not a lot of differance in the two go with the bigger if you are going that route
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07 TRX 450ER 14/1 CP piston/ +1 valves intake & exhaust/ 208 web cam/ High Rev valve springs/ potred & polished/bored carb by DASA/ DASA Classic exhaust / Leagers +2 MX Lt a-arms/ Ohlins Lt front & Fox Podium X DSC Rear shock and LSR DC-6 linkage/LSR duel row carrier/ G-Force axle/ Pro Armor skid & rear bumper/ Hiper Bead locks/ Quadcross Pro's/ Houser +1 stem/ Precision stablizer/ Pro Taper Fat bars/ ASV levers/ Quadtech hump seat. My trail ride is a 07 GRIZZLY 700 !
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08-07-2011, 01:40 PM
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Member
My Ride: 2007 Custom 450R
Feedback Score: 0 reviews
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My ATV: 2007 Custom 450R
Member #1273
Join Date: Apr 2011
Location: Nova Scotia
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69 is right, theres not alot of difference.
but i have run both setups in the past and the 416 kits stayed alot cooler when pushed in a race
just my $0.02
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03-02-2012, 12:42 PM
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Junior Member
My Ride: 2000 400ex
Feedback Score: 0 reviews
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First Name: born in Cincinnati grew up on 2stroke 2wheels
My ATV: 2000 400ex
Member #2100
Join Date: Feb 2012
Location: sardinia ohio
Posts: 16
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I have the 416cc87mm and i have no complaints i bought it this way so i dont have anything to compare it to other then its way faster then my 300 ex was!
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87mm bore&piston
Tusk top end gaskets
Port&polish stg1
Whitebros.full exhaust
14t front sprocket
K&n air filter lid off
Modified choke
Rear brake block/off
Razr2 rear tires
 new swingarm bolt goshdmfsab not fun
Hotcam stg1
Plus other non performance stuff
Thanks to this site, I was able to tear my top end down with confidence and results
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