400ex Hp Question

[seven]

What kind of HP would you expect to see from a 400ex built to a 426 with a hot cam stage2 and full yoshi exhaust. I would guess between 35-40 horse but thats just my guess. And this would be on a new 400 with the bigger carb.

[hondafox440]

35 or so sounds feasable. Figure it is what, 27HP stock?

[seven]

I am leaning towards buying a new 400ex for the simple fact that I can make most of my R parts bolt on to it. I just dont know if the lack of HP would be worth the trade. I dont ride in the sand,mostly MX and some trail. I want around 40HP without getting into a ton of motor work.

[hondafox440]

HP isn't everything. Torque is what moves the quad. With a 440 kit, Yoshi exhaust, and a cam 40HP sounds very reasonable though, coupled with arm wrenching torque.

[seven]

I totally agree with that. But I ride a Mx track that is for motorcycles and you need around 40 ponys to make the short runs to the jumps. Other then that I could care less about it. Hp dont mean squat unless you want the fastest quad in a strait line. I thought about the 440 kit also but I havent been able to ride either so I dont know if the extra cash to get it resleeved is really worth it or not. If I had a ton of money I would get a YFZ but I am really not all that impressed with them for the extra
2000$ You can make an ex scream.

[JOEX]

Would making gearing changes work for your different riding styles?

Joe

Originally posted by seven
I totally agree with that. But I ride a Mx track that is for motorcycles and you need around 40 ponys to make the short runs to the jumps. Other then that I could care less about it. Hp dont mean squat unless you want the fastest quad in a strait line. I thought about the 440 kit also but I havent been able to ride either so I dont know if the extra cash to get it resleeved is really worth it or not. If I had a ton of money I would get a YFZ but I am really not all that impressed with them for the extra
2000$ You can make an ex scream.

the duncan racing 440 national kit claims 42 hp for the 400ex, the yfz stock is 37 and in a drag once they both hit 3rd the yfz was gone, its all about the delivery and what not, a 400ex capable of beating a yfz isnt reliable, if it was id still be riding a 400ex