DMC Alien Exhaust
That's alot of power gain without re-jetting.....How far fetched do you think this is for the YFZ450?????
Full Version: 10 Hp Gain
Very. On the YZ series of four stroke motor, 400/426/450, the engines are already in high states of tune. I looked into hot rodding my YZ400F and it would have cost me several thousand dollars in new cams, valves, cylinder, and such to be barely ahead of where the 450 is now. That was running pump gas. If you up the compression and run race fuel, 10hp is feasable but not with just a pipe. I call bullshite on that claim.
I agree, the 10hp is a little far fetched. However, the YFZ comes with a VERY restrictive intake and exhaust from the factory, unlike the YZ line of bikes. Most of the aftermarket pipes for the YFZ will get you about 5-7hp if you throw the air lid away, rejet and install a higher flowing filter. Adjust the exhaust cam timing (free) and you will get right around that 10hp increase.
I'm thinkin i agree DMC's Webpage
Hey Bronc, check out this site YFZ Central for info on your future ride. Lots of good tech info in there if you search around.
THanks Bad Habit...spent hours and hours on there this weekend. With all the stuff i'm buying along with the new quad, i wanna make sure i get all the opinions and feedback i can.
You guys have all been SUPER helpfull in all my decisions thus far!!
You guys have all been SUPER helpfull in all my decisions thus far!!
maybe 7 wiht re jetting
No kiddin aside...its not far fetched at all. I know...its hard to belive...but from first hand experience riding a friend of mine YFZ...i can tell u right now its all true. If i hadnt of riddin it myself...i prolly wouldnt of belived it either! There is a video on yfzcentral.com home page of a stock yfz vs. moded. Check it out...this quad is a friggin damm rocket!!!
| QUOTE (rivermobster @ Feb 15 2004, 11:56 PM) |
| No kiddin aside...its not far fetched at all. I know...its hard to belive...but from first hand experience riding a friend of mine YFZ...i can tell u right now its all true. If i hadnt of riddin it myself...i prolly wouldnt of belived it either! There is a video on yfzcentral.com home page of a stock yfz vs. moded. Check it out...this quad is a friggin damm rocket!!! |
RIVER.....does your friend have the DMC alien pipe????
| QUOTE (rivermobster @ Feb 15 2004, 11:56 PM) |
| No kiddin aside...its not far fetched at all. I know...its hard to belive...but from first hand experience riding a friend of mine YFZ...i can tell u right now its all true. If i hadnt of riddin it myself...i prolly wouldnt of belived it either! There is a video on yfzcentral.com home page of a stock yfz vs. moded. Check it out...this quad is a friggin damm rocket!!! |
Click on Bottom left one....Unbelievable difference
That's a smokin difference, sounds like the other (blue one) is piped. That's the difference with the cam mod........WOW.
yeah bronco...that is the exact pipe he has. first thing i noticed was the size of the head pipe...the diameter of that thing is HUGE!!!
You can ask him about it over at THE COMPOUND if'n you want...he is happy to answer all questions!
He goes by TestostaRob Click here!
You can ask him about it over at THE COMPOUND if'n you want...he is happy to answer all questions!
He goes by TestostaRob Click here!
Thanks rivermobster......checking it out now!!
That movie cant tell squat, It also depends on the rider when to know to shift the paddles diferent paddles diferent outcome
That is true, tough to tell. Waiting to speak to the guy who actually owns that white YFZ450...on another site...Pretty big difference though
my buddy runs dmc's on his banshee and they claimed to give him 14+ hp well we did all the work ourselves and his doesnt seem any faster than mine and i run FMF fatty's and im alot fatter than him. i dont know how they test their "horsepower"
so who knows and good luck with the bike.
rich
so who knows and good luck with the bike.
rich
Thanks Yamiboy
| QUOTE |
| However, the YFZ comes with a VERY restrictive intake and exhaust from the factory, unlike the YZ line of bikes |
So why would ANY manufacturer put a restrictive system (intake and or exhaust) on one vehicle (YZF) and not on another (YZ)?
Could there be a good reason?
emissions? Are the rules any different for a 2 wheel OHV or a 4?
Is there another reason?
you should get that pipe!
LRD and ESR seem to make the best pipes for the YFZ450. I plan on picking up an ESR when I come into some cash.
I do not hold much trust in the claims that DMC make. I dont think that the quality of their product is on par with other companies. my 2 cents.
I do not hold much trust in the claims that DMC make. I dont think that the quality of their product is on par with other companies. my 2 cents.
Spoke to a fella Rivermobster referred me to and your all right.....a pipe is a pipe. They all give ya lots more power but there all within 1-2 hp from each other. I still like the DMC pipe and will be purchasing with the quad in a month. Now i'll post my last thread....Graphics 
| QUOTE (journeyman @ Feb 18 2004, 12:15 PM) | ||
So why would ANY manufacturer put a restrictive system (intake and or exhaust) on one vehicle (YZF) and not on another (YZ)? Could there be a good reason? emissions? Are the rules any different for a 2 wheel OHV or a 4? Is there another reason? |
I think the reason might be because all the manufactures are still feeling the effects from all the lawsuits of the late eighties. Can't make a quad roll of the manufacturing floor with too much power, the tree huggin eviro-nazi's would start loading up for the fight again. After all, quads are just funny little play toys for mascots at football games to ride around on. Or something to have in the backyard and put the kids on. "Go ahead and put little princess on the Raptor, I know she's only 4, but she's big for her age."
Seriously tho, the YFZ motor is actually VERY tuned down from the YZ-F dirtbike. Lower compression ratio, different cam timing, smaller intake, more restrictive exhaust. Give it a few years and they probably won't be so gun shy. I wouldn't be surprised that dirtbikes and quads will share the exact same motors in a few years. Sure would simplify production capabilities too.
Well said bad habit
I'll second that guys!!
Goin with the DMC Alien!!!!! Slip on, they say the head pipe on the YFZ is plenty big enough
Fellow duners! I work for Advantage Performance and we own the DMC Alien product line and I sell 'em on a daily basis. For the YFZ450 we got a 9.9 horsepower gain over stock without re-jetting the quad. Really.
Now, does this mean you wont have to re-jet your YFZ? No. You may have to re-jet depending on where you ride. Also, if you install a Pro Design air filter kit (everybody does) and remove the air box lid, you will most definatley have to re-jet the bike.
Now for a tip, guys that ride their YFZ450's REALLY hard are bending the aluminum sub frame down. Now guess whats attached to the sub frame, the muffler. If the sub frame bends it may bend/break the exhaust no matter whos pipe you're running! Keep an eye on it!
Now, does this mean you wont have to re-jet your YFZ? No. You may have to re-jet depending on where you ride. Also, if you install a Pro Design air filter kit (everybody does) and remove the air box lid, you will most definatley have to re-jet the bike.
Now for a tip, guys that ride their YFZ450's REALLY hard are bending the aluminum sub frame down. Now guess whats attached to the sub frame, the muffler. If the sub frame bends it may bend/break the exhaust no matter whos pipe you're running! Keep an eye on it!
Keep in mind that the law limits db levels to 96db on all new quads. Any pipe that is not 96db rated is for closed course only. Tough decission, go faster or go legal. There has been talk about sound level enforcement at G, never seen it myself, but something to think about.
How can they say it needs no jetting? A stock yfz is too lean straight from the dealer. If DMC says thier pipe doesn't need jetting and you believe that you'll be in some serious trouble. All these pipes are going to give you about the same except for the ESR mainly because of the way the headpipe hugs the engine alot closer. Hands down it produces the most top end power. 2-3 more hp. That'll be my third pipe purchase for the YFZ. First was the HMF which I wasn't happy with. Next was the Alba which is a hell of a performer for the money. After the seasons over I'm doing the ESR once they redesign it to work with a kickstarter
| QUOTE (sicaz shee @ Feb 26 2004, 12:38 AM) |
| How can they say it needs no jetting? A stock yfz is too lean straight from the dealer. If DMC says thier pipe doesn't need jetting and you believe that you'll be in some serious trouble. All these pipes are going to give you about the same except for the ESR mainly because of the way the headpipe hugs the engine alot closer. Hands down it produces the most top end power. 2-3 more hp. That'll be my third pipe purchase for the YFZ. First was the HMF which I wasn't happy with. Next was the Alba which is a hell of a performer for the money. After the seasons over I'm doing the ESR once they redesign it to work with a kickstarter |
Why would you dump the alba for the esr? I have the alba, and was just cusious as to your motives. Have you any personal experience with the alba vs the esr? I am not saying alba is the best by any means, but I can't imagine the difference between the two being worth the $500 or so that a new exhaust costs. Maybe you like the esr more cosmetically? I can understand that as well.
I have nothing bad to say against the alba. It's basically a low to mid range pipe. A buddy of mine has the same mods I do with an ESR and I rode his and I could feel the difference when I went past 1/2 throttle. I have no desire to pay $600 for it though. Saw a shop on ebay selling them for $500 awhile back. If I see that again I might pull the trigger. Personally for the money the Alba I think is the best value.
| QUOTE (Bronc-O-Boy11 @ Feb 18 2004, 06:23 PM) |
| Spoke to a fella Rivermobster referred me to and your all right.....a pipe is a pipe. They all give ya lots more power but there all within 1-2 hp from each other. I still like the DMC pipe and will be purchasing with the quad in a month. Now i'll post my last thread....Graphics |
"It's been a month"......is almost over
Couple more weeks and she's mine
Just bought mumzie a new Windstar so money's a little tight, i may go with the factory pipe and finance along with the bike....gets me piped and saves me a little " outa pocket cash ".
Couple more dayz...... 
| QUOTE (Bronc-O-Boy11 @ Mar 26 2004, 08:12 PM) |
| Couple more dayz...... |
Ahhhhh the sleep i lost waiting for the new machine
What is the resistance to re-jetting?
Seems like an easy way to put more fuel in. More Fuel (at the right mixture) = More HP.
Am I missing something here?
Seems like an easy way to put more fuel in. More Fuel (at the right mixture) = More HP.
Am I missing something here?
| QUOTE (journeyman @ Apr 25 2004, 02:21 PM) |
| What is the resistance to re-jetting? Seems like an easy way to put more fuel in. More Fuel (at the right mixture) = More HP. Am I missing something here? |
The only resistance was getting the needle out of the top of the carb......
Pain in the butt without pulling the carb off.
hey guys, i am thinking about getting a yfz 450 this summer, what kinda mods should i do to it? and how much do they cost? i know pipe, and a filter, what about that cam kit? or should i just buy an alba yfz?
| QUOTE (The Dude @ Apr 30 2004, 12:37 AM) |
| hey guys, i am thinking about getting a yfz 450 this summer, what kinda mods should i do to it? and how much do they cost? i know pipe, and a filter, what about that cam kit? or should i just buy an alba yfz? |
Great choice dude
These things are wickedly fast right outa the box.
If ya have the cash to blow...giver with the aftermarket stuff.
all i did was pull the baffle and rejet and that's enough for me, i don't want to take away from the long term reliabilty.....
| QUOTE (The Dude @ Apr 29 2004, 10:37 PM) |
| hey guys, i am thinking about getting a yfz 450 this summer, what kinda mods should i do to it? and how much do they cost? i know pipe, and a filter, what about that cam kit? or should i just buy an alba yfz? |
If you can get a good deal, buy the alba yfz, and then do the cam mod. That will be enough to keep you happy for a while.
| QUOTE (Bronc-O-Boy11 @ Apr 25 2004, 04:33 PM) | ||
The only resistance was getting the needle out of the top of the carb...... Pain in the butt without pulling the carb off. |
Loosen the 2 boots, and turn the carb so the top of it is facing the brake pedal. Then take out the 3 allen screws that hold the lid on the carb. Pull out the allen above the needle. Then put you hand just above the needle with your fingers open. Open and close the throttle as fast as you can with your other hand, and the needle will fly up. Catch it with your fingers.
I can do a rejet, and move the clip on the needle in just under 5 minutes nowadays.
good call 24v....great idea
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