500EX or 450R

[Cripple]

four stroke tech 500 kit along with a cam, valve spring, and port/polish on a 400EX already set up in the suspension department, or $6500 for the 450R, I mostly ride some pretty soft dunes and trails, not just hill shooting or drag racing so torque is appreciated and I wouldnt be doing any serious racing. just trying not to burn a whole in my pocket. thx

[olimj]

Same question here. I just picked up a stock EX for $2400. Thinking about building a reliable pump gas stroker (465?) mainly for tree-shooting climbs at the dunes. I can live with stock suspension. Really don't even need it to breath if torque gets the job done.

[woprs50]

a few months ago i bought a 99 400ex with a 440 kit web 450 451 cam and since i have bought it i have had to get a new 440 kit cause the guy i bought it from had the motor apart and slapped it back together like a piece of chit to get rid of it so since it has been down i did some porting on the head bought the Sparks X6 exhaust and a FCR 40 mm carb after its all done i dont even want to add up the costs of everything i have in it and i wish i would have just went and bought a new 450 R cause i did all this stuff hoping it will hang with a new 450 when i could have just bought a new 450 and not had to worry about any mechanical problems cause everythign would have been under warrenty and i wouldnt have had to worry about it and from looking at there HP numbers its just crazy the power there gettin out of those things



so in answer to your questions if your looking for a fast quad buy a new 450 i know i wish i would have especially since now i have to try to keep this thing cool :eek2:

[2004TRX450R]

Well I raced my cousin's 400EX that is bored as far as it can be big bored. I think it is in the 460 range. Basicly money was no object with it. Custom valves, big cam, hi comp piston, major porting etc. He has like $25K into the whole bike. He pulled about 2 bike lengths on me at Florence up comp hill on my 450R with and HRC kit. I'm not sure how much he weighs but I bet I got a good 50 lbs on him too wich would make up for that gap. Needless to say I'd go with the 450R. You have all that work into the 400 and you just barely have what a 450R has. Then you do a couple things to the 450R and you smoke the highly moded 400EX.

[Dunlap]

It's always good to start with a new quad if you can but some times you can get a good deal on use quads with alot of after market stuff on them. The 500ex's I sold would have cost $17000 to build and we sold them for $6000 and $7000. If you get a 450r you can build it to a 500r for a few hundred dollars.

[Shawn H]

Hey is it true you guys have auto clutches in your 450's for gncc.

How are they?

Just seen it in some magazine probably dirtwheels and was wondering.

[olimj]

Originally posted by woprs50
so in answer to your questions if your looking for a fast quad buy a new 450 i know i wish i would have especially since now i have to try to keep this thing cool :eek2:

In my case, I'm not necessarily looking for a fast quad so much as a hillclimber. One problem I have with the 450R is gear ratios. 1st is too tall to putt-putt, and too slow to hill climb. Yet the stock motor won't pull 2nd on a steep no-run climb w/ 200 lb rider (maybe with HRC?). It's set up for racing, not playing. 400ex ratios are lower making 1st better for tight spots and 2nd better for climbing.

[04'400ex'er]

Bump a tooth off the front on the 450r and should let you climb in 2nd.

[rap169]

my 450r stock climbs some of the steepest hills in 2nd with out breaking a sweat. These are steep coal banks. I dont get the best shot at them either. Some i get no runing start at all. I do weigh 35lbs less, but i would think that with an exhaust, u could easily do it too.

[olimj]

Hmm, maybe PA coal is looser than OR dunes sand. Definitely no 2nd gear starts, and pretty tough to pull 2nd after a quick shift. My bro already dropped a tooth on the front, which helped some.

[Cripple]

Originally posted by olimj
In my case, I'm not necessarily looking for a fast quad so much as a hillclimber.
exactly what i'm thinking

[olimj]

Has anyone ridden an EX stroker that can comment on the vibration? When I first stroked my 250x to 350, it was very noticeable, but I got used to it and quickly forgot about it.

[Dunlap]

I use a lighter piston and rod assembly on the 500ex motors over the stock motor so you don't have a problem with it.

[04'400ex'er]

Originally posted by Mickey Dunlap
I use a lighter piston and rod assembly on the 500ex motors over the stock motor so you don't have a problem with it. Isn't he good?

[stupid driver]

Originally posted by woprs50
a few months ago i bought a 99 400ex with a 440 kit web 450 451 cam and since i have bought it i have had to get a new 440 kit cause the guy i bought it from had the motor apart and slapped it back together like a piece of chit to get rid of it so since it has been down i did some porting on the head bought the Sparks X6 exhaust and a FCR 40 mm carb after its all done i dont even want to add up the costs of everything i have in it and i wish i would have just went and bought a new 450 R cause i did all this stuff hoping it will hang with a new 450 when i could have just bought a new 450 and not had to worry about any mechanical problems cause everythign would have been under warrenty and i wouldnt have had to worry about it and from looking at there HP numbers its just crazy the power there gettin out of those things

Longest sentence of the year award. Congrats :p ;) :p

[RAPTORAZ]

Originally posted by olimj
Has anyone ridden an EX stroker that can comment on the vibration? When I first stroked my 250x to 350, it was very noticeable, but I got used to it and quickly forgot about it.


I've ridden my buddie's KENZ built 465 stroker many times, and it has less vibration than my piston/cammed EX.

My opinion on the 450R/EX debate is. If you like the EX, then stick with it. I've seen plenty of well built EX motors that eclipse 450R RWHP levels. Many of which are only 440's.

On a side note, my buddie's KENZ built 465EX bested an HRC equipped 450R by a solid 7 RWHP on the same dyno. So the 450R is not unbeatable by any means.

[Snow]

Originally posted by stupid driver
Longest sentence of the year award. Congrats :p ;) :p

hahahahaha

[Snow]

Originally posted by stupid driver
Longest sentence of the year award. Congrats :p ;) :p

hahahahaha

[shano125]

I have a four stroke tech 500cc kit in my 400 and have no problem beating 450's and big bore raptors on the 1/5 mile oval. Remember torque gets you to the first corner first and horsepower only burns a hole in the ground ( a quote from my friend Lucky(reality of speed, Team Samsung/Radio Shack/Yamaha)

[04'400ex'er]

Originally posted by stupid driver
Longest sentence of the year award. Congrats :p ;) :p What does he win?
:eek2:

[Cripple]

shano, did you just use the base kit or have you done more to the engine?

[shano125]

It was just the basic kit(crank, piston, and cam) I used a yoshimura exhaust. This week I'm adding a 39mm FCR carb and Curtis Sparks heavy duty stud kit. I had so much money invested in my 400 that I had 3 choices to remain competitive. Either sell it for a big lose, change engines (crf or yzf), or the 500 kit. The first one was not concidered, the second choice was to time consuming and was alot more money, so I went with the 3rd.

[Goat397]

On a side note, my buddie's KENZ built 465EX bested an HRC equipped 450R by a solid 7 RWHP on the same dyno. So the 450R is not unbeatable by any means.


throw a good exaust on that 450 and bigger cam and that 465 will be hurtin and the 450 will be cheaper and more reliable

[RAPTORAZ]

Originally posted by Goat397
On a side note, my buddie's KENZ built 465EX bested an HRC equipped 450R by a solid 7 RWHP on the same dyno. So the 450R is not unbeatable by any means.


throw a good exaust on that 450 and bigger cam and that 465 will be hurtin and the 450 will be cheaper and more reliable

You obviously missed the part where I said that the 450R had the HRC kit on it. That was also with an aftermarket exhaust. I've also seen several YFZ's and 450R's with porting and aftermarket cams. They gain very little in performance. Both the YFZ's and 450R's are very potent from the factory. And have little gains in performance. So far, I've only seen one YFZ eclipse my buddie's 456EX on our home dyno. And it was a 470 with aftermarket cams, porting and a 41mm FCR. And it only bested my buddies 465EX by 1 RWHP.

All engines are air pumps. They will all make similar HP as long as they are built similar.

[oste]

Originally posted by RAPTORAZ
You obviously missed the part where I said that the 450R had the HRC kit on it. That was also with an aftermarket exhaust. I've also seen several YFZ's and 450R's with porting and aftermarket cams. They gain very little in performance. Both the YFZ's and 450R's are very potent from the factory. And have little gains in performance. So far, I've only seen one YFZ eclipse my buddie's 456EX on our home dyno. And it was a 470 with aftermarket cams, porting and a 41mm FCR. And it only bested my buddies 465EX by 1 RWHP.

All engines are air pumps. They will all make similar HP as long as they are built similar.

I keep hearing built 450R's are breaking con-rod's if the rod's aren't replaced every 20 hrs of use. Is this true? Built meaning high comp piston at least 12:1 or more, and all other mods besides stroking. :confused:

[oste]

Originally posted by RAPTORAZ
You obviously missed the part where I said that the 450R had the HRC kit on it. That was also with an aftermarket exhaust. I've also seen several YFZ's and 450R's with porting and aftermarket cams. They gain very little in performance. Both the YFZ's and 450R's are very potent from the factory. And have little gains in performance. So far, I've only seen one YFZ eclipse my buddie's 456EX on our home dyno. And it was a 470 with aftermarket cams, porting and a 41mm FCR. And it only bested my buddies 465EX by 1 RWHP.

All engines are air pumps. They will all make similar HP as long as they are built similar.

I keep hearing built 450R's are breaking con-rod's if the rod's aren't replaced every 20 hrs of use. Is this true? Built meaning high comp piston at least 12:1 or more, and all other mods besides stroking. :confused:

[oste]

Originally posted by RAPTORAZ
You obviously missed the part where I said that the 450R had the HRC kit on it. That was also with an aftermarket exhaust. I've also seen several YFZ's and 450R's with porting and aftermarket cams. They gain very little in performance. Both the YFZ's and 450R's are very potent from the factory. And have little gains in performance. So far, I've only seen one YFZ eclipse my buddie's 456EX on our home dyno. And it was a 470 with aftermarket cams, porting and a 41mm FCR. And it only bested my buddies 465EX by 1 RWHP.

All engines are air pumps. They will all make similar HP as long as they are built similar.

I keep hearing built 450R's are breaking con-rod's if the rod's aren't replaced every 20 hrs of use. Is this true? Built meaning high comp piston at least 12:1 or more, and all other mods besides stroking. :confused:

[Chef]

Originally posted by 2004TRX450R
Well I raced my cousin's 400EX that is bored as far as it can be big bored. I think it is in the 460 range. Basicly money was no object with it. Custom valves, big cam, hi comp piston, major porting etc. He has like $25K into the whole bike. He pulled about 2 bike lengths on me at Florence up comp hill on my 450R with and HRC kit. I'm not sure how much he weighs but I bet I got a good 50 lbs on him too wich would make up for that gap. Needless to say I'd go with the 450R. You have all that work into the 400 and you just barely have what a 450R has. Then you do a couple things to the 450R and you smoke the highly moded 400EX.

Tell the rest of the story. I was running billet beadlocks, 10 paddles, and the small carb. :p We will see how it works next time we go. :cool:

And the YFZ's at Castle Rock were no problem-until the 400 got so hot that it started cuttin out on top end. :eek2: I holeshotted the heat, and out pulled Josh's YFZ down the back stretch, but later in the race Russ shoved me out of the groove on his YFZ. (That could be the sweetest looking YFZ I have EVER seen.)