i am hittin the rev limiter...

[Tommy 17]

guys i am hittin the rev limiter all the time is there any way i can get a rev limitier cdi box that will start easy and is it hurting my motor at all that i am hittin this thing all the time... thanks...
TOMMY

[Guy400]

What gearing you running? Running the stock tire?

[Tommy 17]

16t front with 20 rears... when i had on my 15t it was horrible it would be shifting like crazy....

[NJ300ex]

go down in the rear. I'm not sure how many teeth the 400ex rear sprocket has but i would say go down 2 or 3 teeth. This is equal to 1 higher on the front sprocket.

[Tommy 17]

i don't want to loose my power though i just want to increase my rev with out starting problems...

[Dave400ex]

I heard that the TC Rev Limiter is different from the White Bros some how. It still lets it start as good as Stock. I saw it on this Site, but I`m not sure what thread it was. I guess you could call TC and ask.

[knighttime]

The top of the hp/rpm curve flattens out. I think you may have to adjust your throttle cable. If your quad is set up properly you really shouldn't have to "red-line" it.

[Tommy 17]

what do u mean adjust my throttle...

[Dunlap]

You can have your stock box modified for $85 and you won't have any problem with starting.

[shock400ex32]

Who will modify the stock Cdi box?

[Dunlap]

I did'nt come on here to sell stuff but I do it.'FOUR STROKE TECH''

[barbwire44]

Originally posted by 400ex21
i don't want to loose my power though i just want to increase my rev with out starting problems...

Well i would suggest you sell the 400ex and buy a two stroke. I find it hard to beleive a 400ex with only a 406 piston would be very gearbound with a 16 tooth sprocket and stock rears.

[Guy400]

Originally posted by barbwire44
I find it hard to beleive a 400ex with only a 406 piston would be very gearbound with a 16 tooth sprocket and stock rears. That's sorta what I was thinking. Tommy, you sure it's the rev limiter and not a jetting issue on the high side? Many guys on this board run 416's and 426's and not many of them have talked about bouncing off the limiter with a 16 tooth.

[RAPTORAZ]

I'm using the White Bros. box with a 45 pilot and I have no problems starting mine.

[NJ300ex]

It isn't hard starting for you because you live in arizona. Most of the people that have trouble starting their atv with it, live in places where the temperature gets below 50.

[badass400ex]

so mickey when you modify the stock box do you still have problems with it starting? also when are you gonna get ur site up?

[moto93]

Originally posted by Mickey Dunlap
I did'nt come on here to sell stuff but I do it.'FOUR STROKE TECH''

Yet here you are.

[sly400ex]

I find it very unlikely you are hitting the redline, by that time your HP has dropped drastically so I don't even know how that can be possible. You don't even hear guys on here running a 14 tooth complaing of this, and that will rev the engine out much quicker than 16 tooth.

[Tommy 17]

i am positive its the rev limiter... i think one of my problems could mayb be my tires are to bald and i am spinning so bad that they aren't hookin up... could this have anything to do with it... i will go check the plug here soon and see if its a jet problem but i don't think so... and i don't wanna sell my 4 for a 2 stroke i rode 2 strokes for years and i don't like them as much as my 4stroke...

[RAPTORAZ]

[QUOTE]Originally posted by NJ300ex
It isn't hard starting for you because you live in arizona. Most of the people that have trouble starting their atv with it, live in places where the temperature gets below 50. [/QUOTE





I didn't have any problems starting it at the dunes in the morning either. According to the thermometer outside my trailer it was 36 degrees outside and it started fine. As for hitting the rev limiter, I used to hit mine quite often in the lower gears until I put on the rev box.

I bought a rev box from magnum it gives you an extra 1000 rpm. but i cant imagine needing it i never hit mine even before i changed it. is you 400ex stock? I jetted mine too. I dont remember what size jet i went to. I used the one the instructions suggested to use with your airbox lid on. And as far a starting problems I dont have any I have started mine at temps in the 20's with out the choke. dont get me wrong it doesn't idel for a little while and it will stall a couple times but it starts every time.
but your not the first person i herd mention starting troubles. keep us posted and let us know what the problem was.

Shift sooner ! :D :p

[86atc250r]

Oddly enough, since switching to the 16T front sprocket, I've been bouncing off the rev limit quite often (in the first two gears) - never had any trouble when I was running the 15T. Apparently it has something to do with where I feel I should be shifting with this setup.

It's really not causing me much of a problem, it will just take a little getting used to short shifting a bit...

[Tommy 17]

i checked my plug its jetted fine.... i put on my friends brand new tires from his 02 and it fixed the problem some... guess i gotta start short shifting 2...