Sprockets to beat a 2007 Honda 400ex

i am changin my sprockets i want to add more torque but not lose very much top speed wat size should i use...... i would like to change the sprockets so i can beat my buddys 07 400ex with hmf slip on and rejetted..... we top out and then he slowly creeps past me..... wat size i need to stop this prob????

A 13t on the front of a 99-04 significantly reduces top speed.

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Originally Posted by marioweldinginc A 13t on the front of a 99-04 significantly reduces top speed. Sent from my SGH-T959V using Tapatalk

i dont want tht to happen..... if i was to do a 16t in the front and keep a 38t in the back and then buy a dyno jet kit would tht raise top speed significantly and the jet kit would restore lots of torque??

If you go 16/38 you would have all the top.speed you need. In fact you wouldnt have a good bottom end at all.

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Originally Posted by marioweldinginc If you go 16/38 you would have all the top.speed you need. In fact you wouldnt have a good bottom end at all. Sent from my SGH-T959V using Tapatalk

would the dynojet kit help at all its suppose to add 15 to 25% horsepower..... i want to still have a pretty decent bottom end

I have a dynojet stage 2, whitebros slipon, k&n filter and EHS airbox lid and i prolly freed about 6 max rear wheel horsepower

Remember a company makes hp claims using perfect parameters not on the trails

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Originally Posted by jerod400ex would the dynojet kit help at all its suppose to add 15 to 25% horsepower..... i want to still have a pretty decent bottom end

You should switch to a.free flowing exhaust (any slip on really) a free flowing intake or air filter
For stage two you need to open your airbox either by removing the lid or using an ehs kit
Then the dynojet kit will make hp. Without mods the jet kit wont do.much cept make your.wallet lighter


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Originally Posted by marioweldinginc I have a dynojet stage 2, whitebros slipon, k&n filter and EHS airbox lid and i prolly freed about 6 max rear wheel horsepower Remember a company makes hp claims using perfect parameters not on the trails Sent from my SGH-T959V using Tapatalk

ya i see wat ya mean.....and im talkin drags so i need to find a good combination so he wont just loose me off the start and in the end i will pull on past him

Originally Posted by marioweldinginc You should switch to a.free flowing exhaust (any slip on really) a free flowing intake or air filter For stage two you need to open your airbox either by removing the lid or using an ehs kit Then the dynojet kit will make hp. Without mods the jet kit wont do.much cept make your.wallet lighter Sent from my SGH-T959V using Tapatalk

one tht blows out more air u mean than the white bros....... i was thinkin of buyin k&n air filter with an outerwear pre filter and then just cuttin the air box off and put in the jet kit

I have a wb and its not restrictive at all. But any slipon will flow more air than stock

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