Will bigger cams effect reliability of Honda 400ex

does bigger cams effect the relableity of his 400ex and will it keep up wit 450

No it won't hurt reliabilty. Depending on what stage you get. Most increase mid-high end or the RPMs. You won't gain top speed without changing your gearing. Maybe 1-2 mph.

I think it would take more than cams to make a 400ex keep up with any 450. But, it is a good start and like Bot said, it won't hurt reliability much, as long as you don't go with a cam with a really aggressive profile. If you aren't doing a bunch of other mods to go with it, you don't really want really aggressive cams anyway.

BTW, I changed the thread title.

a stage 1 or stage 2 cam will not hurt ... but if you go with any thing larger then it will ! i run an XR 400 cam in 1 of mine and it was a big difference .. the dirt bike cam is a little more than a stage 1 cam for the 400ex .. but is a little less than a stage 2 ... its kind of in the middle ... and it is a stock honda cam and is legal to run in any stock 400 class ... i run a few hill climbs that the motor must remain stock... so its legal but its kind of not ...lol... if ya want to know any more about the 400ex send me a message ... i own 2 of the 400 ex's and have 9 motors that i use for different races and or classes that i run...

im looking into getting a cam. but everyone is talking about it giving u more high end. i want more low end aswell... what do i do for that?

use a stock XR 400 dirt bike cam ... they will give you alot more grunt through the whole rpm range .. and they are fairly cheap on ebay

Originally Posted by rrdh im looking into getting a cam. but everyone is talking about it giving u more high end. i want more low end aswell... what do i do for that?

Go up a tooth in the front.

Originally Posted by Stoopidbot1 Go up a tooth in the front.

I think you meant to say go down a tooth in front, or up in the rear.

Thanks, I ALWAYS mix it up.

alright thanks.. will try that