View Full Version : 400ex JE Piston
DH400EX
12-07-2005, 05:55 PM
brand new still in the box JE piston for a 400ex. It is stock bore and 10.5:1 compression ratio. I only opened the box to make sure everything was there because i bought it off ebay. askin $120 shipped o.b.o
DH400EX
12-07-2005, 06:01 PM
pic.
DH400EX
12-07-2005, 07:39 PM
BTT
DH400EX
12-08-2005, 03:40 PM
bumpp. someone wants a good mod. for there 400.
zlam27
12-08-2005, 06:09 PM
what is stock comp. ratio, like 9:1?
does this require race fuel or just 93+ octane?
Chino886
12-08-2005, 06:24 PM
Originally posted by zlam27
what is stock comp. ratio, like 9:1?
does this require race fuel or just 93+ octane?
I have the same piston and I run a mix of race and premium (91 in Missouri), it depends on how hot your quad is running, or whether you have detonation or not.....most will tell you to run premium on 400ex if its under 11:1
DH400EX
12-08-2005, 06:37 PM
most people run pump gas up to a 11:1 compression ratio. I was going to run 93 (pump gas) in mine when i put it but jus dont feel like messin with it right now.
zlam27
12-08-2005, 10:08 PM
ill think about it over the weekend. i kinda wanna get a higher comp. piston to compliment my stage 1 hotcam ill be putting in but im not sure if it will affect the slow speed rideability or anything. i also wanna be able to run just 93 octane.
zach
400EX QUADER
12-08-2005, 10:12 PM
just buy this... good power gains, 93 octane and reliable.
DH400EX
12-09-2005, 06:39 PM
Originally posted by zlam27
ill think about it over the weekend. i kinda wanna get a higher comp. piston to compliment my stage 1 hotcam ill be putting in but im not sure if it will affect the slow speed rideability or anything. i also wanna be able to run just 93 octane.
zach you can still run 93 with this. its just most ppl start runnin race gas when they get to 12:1 and higher.
DH400EX
12-11-2005, 09:39 AM
BTT
DH400EX
12-11-2005, 07:16 PM
bump, need this gone.
DH400EX
12-12-2005, 02:33 PM
btt, someone has to want a piston for christmas!
zlam27
12-12-2005, 03:34 PM
i do, i do.
DH400EX
12-12-2005, 04:45 PM
pm'd you;)
DH400EX
12-13-2005, 04:21 PM
btt, this is a good deal for a BRAND NEW piston.
DH400EX
12-14-2005, 02:57 PM
no one:confused:
DH400EX
12-15-2005, 03:01 PM
:(
Powered by vBulletin® Version 4.2.1 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.