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Viktor_trx400
12-24-2009, 09:51 AM
I want to install 6 degree advance timing key in my 400 ex.Now I have a WB all around cam and xr400 head gasket. Is this configuration compatible? Thanks
honda400ex2003
12-24-2009, 09:58 AM
should be, you arent doing anything to the cam or even the head for that matter. the flywheel is further ahead so it advances the timing. just remember that with the flywheel moved the cam is not at TDC when you line up the marks on the flywheel and such to check the valves. steve
Viktor_trx400
12-24-2009, 02:59 PM
ok thanks
400exrider707
12-24-2009, 09:41 PM
These are really only recommended for stock or very mild motors, because they create a lot of extra heat. You should be fine with your setup, but if you ever go high compression, you may want to think about taking it out.
12-24-2009, 09:53 PM
Run the next colder plug and your perfectly fine with heat even a more modified motor.
honda400ex2003
12-24-2009, 10:06 PM
Originally posted by 400exrider707
These are really only recommended for stock or very mild motors, because they create a lot of extra heat. You should be fine with your setup, but if you ever go high compression, you may want to think about taking it out.
from my experiences with it, it is about 10 degrees more on the same motor under the same conditions. but each may be a bit different. steve
H400DAN2004
12-24-2009, 10:22 PM
hey steve. im going to order this and add it to my list you have been working with me on. when i rejet it is it recommended that i run 100 octane instead of the 93 oct i use now? i have access to both very easily. i hope im capable of doing this install. lol
honda400ex2003
12-24-2009, 11:38 PM
on your machine i would say you should be fine running 93 octane. you should not have to go any more than that until you have 11:1 with a sparks key. What is all on the final list for you now, i know you had quite a few ideas. and my appologies, not trying to hyjack the thread. steve
H400DAN2004
12-24-2009, 11:45 PM
Originally posted by honda400ex2003
on your machine i would say you should be fine running 93 octane. you should not have to go any more than that until you have 11:1 with a sparks key. What is all on the final list for you now, i know you had quite a few ideas. and my appologies, not trying to hyjack the thread. steve

i will pm it to you so we dont drift this topic off topic.
muddzilla94
12-25-2009, 11:03 AM
hey if you havent ordered the sparks key yet, i have one that i would trade you for your stock one.
H400DAN2004
12-26-2009, 01:59 AM
Originally posted by muddzilla94
hey if you havent ordered the sparks key yet, i have one that i would trade you for your stock one.

thanks for the offer but i am going to keep all my stock parts in the event i dont like a mod i did i have the ability to go back to stock.