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View Full Version : 400ex REBUILD THREAD!!!!


pods_BMOC
03-23-2009, 05:39 PM
Here we go, full overhaul in process,---IDEAS FOR MODS PLEASE!!!!
pods_BMOC
03-23-2009, 05:40 PM
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pods_BMOC
03-23-2009, 05:40 PM
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pods_BMOC
03-23-2009, 05:41 PM
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pods_BMOC
03-23-2009, 05:43 PM
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pods_BMOC
03-23-2009, 05:43 PM
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pods_BMOC
03-23-2009, 05:44 PM
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pods_BMOC
03-23-2009, 05:45 PM
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pods_BMOC
03-23-2009, 05:46 PM
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crxjarred
03-23-2009, 07:04 PM
im needen too do this soon but good luck on the build u should put a high compressino pisten in it and cam
rob_990
03-23-2009, 07:09 PM
put a crf450 timing chain in there to.

good luck
brian76708
03-23-2009, 07:25 PM
Originally posted by rob_990
put a crf450 timing chain in there to.

good luck

and timing chain tensioner
yfzrider310
03-23-2009, 08:54 PM
Whos cool hat is that in the second pic haha. Wow you got it all the way to the piston tonight. Your gunna be tired tommorow.:D
pods_BMOC
03-23-2009, 09:02 PM
What are the best mods for your money?
pods_BMOC
03-24-2009, 04:06 PM
Cylinder being bored as we speak,.. 416ex with 11:1. Please does anyone have a hotcam they are willing to part with?
pods_BMOC
03-25-2009, 08:37 PM
BUMP
Sanddraging28
03-25-2009, 11:27 PM
i have one about in the same shape....got this far in about 2 hours. doing a 13 to 1 426, stage 3 cam, 450r carb, and houser a-arms with fox shocks
atvhonda-rider
03-26-2009, 07:59 AM
man thos are some good lookin air scoops : )
n811
03-26-2009, 08:17 AM
Yes get the 450 carb! I have a "408" and can tie a 440 in a drag. I beat him on the start everytime he'll catch me at 30-40 yards. I'll take the snappy bottom end over top end speed any day. My motor guy ported it well for more airflow with the bigger carb. More air more power, has shown to beat displacement. Now do both !:D
pods_BMOC
03-26-2009, 09:16 PM
I really would like a 450r carb, but i cannot afford one, $100 then i have to work with the adapters and relocate hoses and choke
Sanddraging28
03-26-2009, 09:22 PM
no adapters needed.....i took the choke lever off mine never need to use it. all you need is the carb, throttle cable off the 450, and the fuel line off the 450. with a little dremel work the carb fits perfect.
zrpilot
03-26-2009, 09:35 PM
Originally posted by Sanddraging28
no adapters needed.....i took the choke lever off mine never need to use it. all you need is the carb, throttle cable off the 450, and the fuel line off the 450. with a little dremel work the carb fits perfect.
Agreed, you don't need one, but without an adapter you will have to re-locate the air box by moving it forward. IMO having the adapter just makes it easier.
Sanddraging28
03-26-2009, 09:52 PM
Airbox??????? what the hell is an airbox:devil: