top speed

[hicktown 357]

my dad ran behind me in hes car when i cjanged the break in oil and he was goin 70 and i was way out front so i think it will run in the 75-80 mph range

[LTandRaptorider]

Stock top speed of the LT-R450 is 68-70mph... ;)

I think either your Dad needs his speedo fixed, or wanted you to feel good. And no, this is not the start of "My LT-R450 goes 80 mph argument. Sometimes the truth hurts, but it's still the truth, nonetheless...

[MXracer16]

Yep, my dad was going beside me on his kingquad and his said 68, and I was slowly creeping by him. Id say about 68-70 as well, granted the speedo on the king was right.

[redlineranger]

what is the stock gearing on the lt-r450? i can see it going close to 80mph with 20inch tires, and a 14 or 15 tooth front sprocket. im with everyone else and im gonna say its about 68-70mph stock.

[AL Elks]

With a 15 tooth front and 20s on the rear it won't pull 5th well at all. You'd definately need cams and a free flowing intake.

My Z with 14/38 on it and with all the mods I have will only hit 85 with my fat butt on it.

[redlineranger]

Originally posted by AL Elks
With a 15 tooth front and 20s on the rear it won't pull 5th well at all. You'd definately need cams and a free flowing intake.

My Z with 14/38 on it and with all the mods I have will only hit 85 with my fat butt on it.

the 15 tooth and 20's will not pull well at all i know, but you will be hauling a** when you get there.... doesnt the 400ex's come stock with 15 tooths on the front?

[AL Elks]

Originally posted by redlineranger
the 15 tooth and 20's will not pull well at all i know, but you will be hauling a** when you get there.... doesnt the 400ex's come stock with 15 tooths on the front?

Possibly, but there comes a point where the motor just won't pull any more and thus you won't go any faster. Just because you gear that high doesn't mean the engine will pull it all the way to the rev limiter. That's where you would need a highly modded motor.

[redlineranger]

Originally posted by AL Elks
Possibly, but there comes a point where the motor just won't pull any more and thus you won't go any faster. Just because you gear that high doesn't mean the engine will pull it all the way to the rev limiter. That's where you would need a highly modded motor.

gotcha;)

[rob-u/21]

the 15 tooth and 20's will not pull well at all i know, but you will be hauling a** when you get there.... doesnt the 400ex's come stock with 15 tooths on the front?

I ran a 15-36 in this years baja 500 with 23 inch fronts and a 21 inch rears, a yoshi slip on, cherry bomb, and foam filter. I did feel I lost some torque in the technical stuff, but once we would get in the straights that thing would fly.

[benz400]

the rev limiter is set at 125 km/h so thats 78 mph, on stock tire and gearing.

[AL Elks]

Originally posted by benz400
the rev limiter is set at 125 km/h so thats 78 mph, on stock tire and gearing.

The rev limiter isn't set at km/h it's set at a specific rpm which doesn't equate to a speed itself.

[benz400]

well, my friend and i, we both tested it and the result was the same for both, 5th gear hit the rev limiter at 125 km/h on a radar gun, my oncle is a police officer.

[AL Elks]

Yes but that doesn't mean that most LTRs will hit that speed at that RPM. Too many variables to state that the rev limiter is set to a particular speed. Again it's set to an RPM and not a specific speed.

In otherwords if you're in first gear and you hit the rev limiter you are definately not doing 125 km/h, however you are at the rpm that the rev limiter is set to. Thus the rev limiter is not set to 125 km/h. I know what you are trying to say and you're just phrasing it wrong.

It would be correct to say that you hit the rev limiter at 125 Km/h in 5th gear however. :p

[benz400]

thats it! but its still 78 mph so thats impressive!

[LTandRaptorider]

:rolleyes: Despite best efforts, this thread has indeed become a disussion/argument about how their LTR will do 80 mph... :rolleyes: Stock gearing and stock tires, you hit 78mph, huh? Hold on a sec... where's the smiley guy rolling his eyes... I think I just used it... Oh, there it is... :rolleyes: :rolleyes: :rolleyes: :rolleyes: :rolleyes:

[benz400]

fine okay, think what u want, i got a solid proof right there, what is more accurate then a radar gun?? NOTHING!
68 mph is like a z400 dood, cmon

[ST87]

The LTR was built for MX look at the tires and suspension not wide open straights with a little work the LTR can be an awesome desert and xc quad but out of the box its meant for mx so its not gonna have a blistering top speed its gonna have the low end grunt. the top speed on a LTR is not very fast the Z maybe a lil faster at top speed than an LTR but the LTR will get to the top speed a heck of a lot faster. If the LTR is any faster than 70 it maybe 71..... Amateurs talk speed Pros talk handling.:chinese:

[Fast@$$Rider]

i have 20 inch tires and a cherrybomb on my ltr and i hit 80 fifth gear pinned i don't know how accurate this was because i was driving beside my friend in his car. it might not be exact but you definately gain more top speed from the 20 inch tires you can feel it i used to race my buddy 700 raptor and would kill him off the start but he would finally catch up when it hit top speed now with the 20s i am easily 2-3 bike lengths ahead of him.

[MXracer16]

Originally posted by benz400
fine okay, think what u want, i got a solid proof right there, what is more accurate then a radar gun?? NOTHING!
68 mph is like a z400 dood, cmon

Yes, radar guns are accurate, but the thing I dont think is accurate is you. Not for one second will I believe that a stock R450 will hit 78. The law requires that manufacturers can not produce a quad that goes any faster than 75. Keep dreaming...:rolleyes:

[DezSled]

Where can one read the law that says an atv cannot go faster than 75 mph? I never have seen that one. Not trying to flame anyone, just curious.

[Baracudaaa]

The top speed, with stock gearing and tires is between 68 and 70 mph, no more. You can NOT compare performance between 2 difference quads by their top speed, they are not related. It is completely retarded to say a Z-400 can do 75, so that would mean a LTR can do 80 because it has more HP, once again, retarded, go back to school kids.
Try comparing 0-60 times instead.
If you want to go faster, you MUST do a gear or wheel change, unless you live in Canada, somehow I guess they are able to break the law of physics. Maybe that radar gun was pointed at your head and fried something?

[bwamos]

http://www.exriders.com/vbb/showthread.php?s=&threadid=234280

6th post has a graph showing an LT-R450 exceeding 80mph on the dyno w/ stock gearing and 18" tires.

Mods of course include: Yoshi Full Exhaust, PIM Module, No Airbox Lid, & Dyno Tires

PIM probably adds 1000rpm like the $35 cherry bomb..

This is probably why so many are gearing down to a 13t front sprocket. It's geared pretty tall if it's hitting that speed. The red line is w/ the 13t front sprocket.

[MXracer16]

Originally posted by bwamos
http://www.exriders.com/vbb/showthread.php?s=&threadid=234280

6th post has a graph showing an LT-R450 exceeding 80mph on the dyno w/ stock gearing and 18" tires.

Mods of course include: Yoshi Full Exhaust, PIM Module, No Airbox Lid, & Dyno Tires

PIM probably adds 1000rpm like the $35 cherry bomb..

This is probably why so many are gearing down to a 13t front sprocket. It's geared pretty tall if it's hitting that speed. The red line is w/ the 13t front sprocket.

I dunno, but to me, it looks like those tires are bigger then 18's.

DezSled, I cant find anything on it right now, so for now, it is just hear-say.

[onesavage]

but but but my uncle is a certified radar bulider and operator and and and what ever he says is the TRUTH oh and he is an expert and testifies to the validity of those radars and he said my ltr does 95 with no mods. so there.... hahahhaha this whole thread is outa control. even if you could gear your 450 to do a hundred it would prob only do it downhill on a hardpack service. thought i would just add to the nonsense:p

[4TraxRider]

My cousins uncles best friends grandmas blaster hit 103 yesterday uphill. We had my geo metro right along side of it and the speedo said it was going that fast so it's definately true.:chinese:

[bwamos]

Originally posted by MXracer16
I dunno, but to me, it looks like those tires are bigger then 18's.

True.. eyeball they look like 20's. I was just conveying what I saw.

If those are infact 20's.. then on stock gearing and 18" tires, w/ cherrybomb/PIM your top speed would be like 74mph. (sounds about right). And without the PIM/CB the top speed would be right around 67mph.

[Baracudaaa]

When I tested I had stock gearing and tires and no C/B, and my Garamin GPS said 69mph. Tried my friends GPS and it said 68mph. That was pinned with no more left in the RPMs.

[readybeartoe]

The Dyno charts are Cool but, IF everyone notices where the power drops off is where the TOP SPEED IS! And that about 70mph. Look at the speed chart again. It's not going to go faster when the power drops OFF.:rolleyes:

[hard one]

I havent cloked it but runnig a r125 and a crf450 it is about a foot behind the cfr and just with the rm in 5th gear

RM125 with v-force,uni filter next to my truck 86-87 on the street
so i would say in the low 80's mph

[bwamos]

Originally posted by readybeartoe
The Dyno charts are Cool but, IF everyone notices where the power drops off is where the TOP SPEED IS! And that about 70mph. Look at the speed chart again. It's not going to go faster when the power drops OFF.:rolleyes:

Umm.. I'd disagree. It won't accelerate as fast.. but it's still making 44hp at 82mph on that dyno. It curves slightly.. but it doesn't hit the sharp dropoff of the rev limiter until the 84mph mark. It's only 4hp lower than the peak horsepower.

With that logic.. a bone stock Raptor 660 would have a top speed of about 45mph because that's where the power peaks.

[AL Elks]

Sorry guys but a fairly stock LTR is not going to go 85mph with stock tires and gearing.

I have a highly modified LTZ400 that will top out at 85mph flat out and it will absolutely blow by my LTR no questions asked. This speed has been veriied multiple times with my Garmin GPS. I've ridden the LTR with someone else on my Z and then ridden the Z with someone else on the LTR and the results are always the same. The Z just flys past the LTR.

Someone needs to calibrate that machine because it's reading EXTREMELY high.

[bwamos]

Originally posted by AL Elks
Sorry guys but a fairly stock LTR is not going to go 85mph with stock tires and gearing.

I don't disagree with that at all. I was disagreeing with the other guy's statment that a quads cutoff point is right at the peak of the power curve.

I think the 18" dyno tires are probably closer to 20". No tire measures exactly what the size is. They looked larger than the stock tires in the photo.

[AL Elks]

Sorry bwamos!

I wasn't aiming that at anyone in particular. I definately understand what you are saying as far as the graph goes. The bad thing about posting things at times as it doesn't always come out on the other end as you meant it. :D

[bwamos]

No worries. :)

I figured you were just talking about the thread in general. I just wanted to clarify the point I was making. ;)

I don't really see any logic in making an MX quad that goes 85mph. Top speed should be about 60 IMHO. I'd rather have the acceleration.

[benz400]

who cares about top speed... tell me when u hit ur top speed on a trail or on a mx track??

[AL Elks]

It actually depends on what you do with the quad. If people buy them to drag race it depends on the distance they are going as to how to set it up. If people want to have the fastest speed wise they build it for that. Different strokes for different folks. I like to do it all myself. My LTR will slaughter my Z on the track but the Z will do the same to the LTR in a drag.

[readybeartoe]

:p

[†2005 400ex†]

hahahahahahahahaha:p :p

[AL Elks]

A dyno is 1 thing. Put it on the street and show me 85mph! :D

[plkmonster2]

Only problem with a dyno is that it does not show wind resistance.

[†2005 400ex†]

or road conditions

[readybeartoe]

I just wanted to show everone how easy it is to make your own dyno chart.
IF it's not a blown up picture of the "actual dyno sheet" then I'm not believing it because it's all just wishful thinking! Or someone trying to sell something:ermm: .;)