No you do not need to run race gas... Just always use 92/93 and you will be fine.. OK my kinda performance report... Since I broke my wrist (and I sent my rear shock to CT Racing/TCS oh by the way CT has a new rear shock for the 400EX it is $850... I talked to todd and he says the performance on the new and rebuilt are the same.. He has a few people running the rebuilt and New Shock and there is no differrence in performance/handling)I cannot give you a ride report but a idle report New FMF Bowerbomb Header and Curtis Sparks +6 degree timing key. I put a new sparkplug in for my test to get a read on the plug but until someone can get out and ride it I will not be able to tell about main jet size.. Well after about 20 min warm up (wasn't started for a week and a half) I hit the throttle.. GOD D**N!!! The throttlre response is amazing... In Stead of soundling like bbbrrrrooommmm it sounded like VROOOMM!!! I was like D**N... Couldn't get enough of the change of the sound.. I attribute that to the powerbomb flowing more air... It quieted the powercore a little just at idle.. Once you punched it you could not tell the difference in the sound level but you could tell the difference in power output(Timing Key)/flow of sound/air(PowerBomb)... SWeeetttt...

 

6 degrees sounds like quite a bit of advance... I know if I advance my V8 another 6 degrees (on top of the 10 degrees base advance it already has) it would ping like a sonuvagun. But, of course that all depends on what timing Honda was running stock.. maybe stock timing only has 4-5 degrees of base advance, in which case another 6 degrees would work great. Keep an ear out for pinging Skunky, and let us know how it does. Too bad you didn't get a chance to check the power increase of the power bomb and timing key separately.

 

Hopefully I can get mine in this week and give you guys a report on performance. It will be the only mod a do at the time.

 

Last night I took out a degree key on a 400ex motor,I didnt know it was a degree key until it was removed.there is no markings on the key.Does anyone know how the right is to put it back in.thanks

 

I think you want the notched side of the key facing the back.

 

ok not sure what you mean,if im looking at the quad do i put the notched side facing right or turn it around and facing left side.thank

 

The notch will be on the right.

 

ok thanks,so this will advance the timing?i run a cdi box also with a 12:1 cp piston.I think the key is 3 degree.some people say dont run a cdi and degree key and some says its ok to run both as long as its 3 degree not a 6 degree ,you have any idea?thanks

 

When you put the flywheel on make sure you turn it to the left before you tighten it down. I dont know much about cdi with the key. +3 key is ok for high compression motor. +6 key is for under 11:1

 

ok thanks for the help