Hi can you please answer my questions

this winter i will get these mods

fmf pipe
k&n air filter
wiseko piston
top end cam
black box CDI upgrade
13 or 14 tooth front sproket
hole shot tire

gain in HP : ?
gain in Top speed : ?
and what is the gain of sound whit that fmf pipe : ?

thank you! hehe

 

Rough guess, you will go from 15/16 Hp to about 20 HP. Top speed from 45 to 55/60. My friend has gone through all the mods (almost) Started with w White Bros pipe and then went to a 250x cam and Uni air filter. Then the White Bros. header. Then went to the 305 kit and a new cam, of course rejet. Now, wants a CDI box. It is on order. Do not buy the Curtis Sparks box. It is for the 250x. Get the TC racing box, it is cheaper, too. Hope it helps.

 

Hey dude i own a 300ex not a 250x my 300ex is a 1998 and since that date 300ex have a 32mm carb and do 17 - 18 hp and i can do
52 mph on asphalt Stock

i hope i will go around 65 mph whit these mods

 

Hey boyz, i'd hate to tell you that my stock 300EX goes 58 mph, only change is a 14 tooth front sprocket.

 

well smart one a 13 to a 14 is a big change in top end

 

Cool strocker imagine whit a pipe and air filter and more how is the torque and acceleration at the 3th first gear ??

anybody know how is the change whit a top end cam and a cdi box pipe,filter, jet kit... .. . ?

 

I used to have a 300EX just before I got my 400EX about 3 or 4 months ago. I could get about 62 out of it, on pavement. That was using a radar that was checked to be accurate with a police officers. The only mods were, pipe, filter, 14 tooth front sprocket. Most of the passed I made though, were about 60 or 61. 62 was the fastest I got like one or two times. I have a friend with a 250X though. He could get 65 all of the time and the most he got was 67. He had 12/1 comp. bored .040 over, a race cam, pipe, filter, and 14/36 gearing. That was on pavement also. My stock 400EX can get 71-73. All I have done to that was a 16 tooth front sprocket and jet kit, nothing major. Bone stock I could get 69-71. But remember, temp, sea level and all types of things like that have to do with your speed. Traction. All of these were on pavement, so of course on dirt they are going to be slower. That's all I have to say about the whole speed thing. And I know right now, someone is going to say, "You can't go that fast on any of those" Well I can't prove it to you, and I don't intend to, so you just have to take my word on it. I don't care if you believe me or not, because I know what I saw. Have a happy holiday. Ride hard and have fun.

Steven

 

Thanx steven i can view around how many mph i will go and im sure i will go over 65mph and keep a good power at low and mid
and if i go whit a 36mm carb and bore up 333cc i will kick lot of *** this will give around 35 hp and 70 mph and more whit the good gearing and a racing cam ,piston ,pipe etc... . .