slip ons

[play2pwn]

Hi fellow members

Im wondering if its a must to rejet my bike if im gonna get just a slipon and im torn between a yoshi and hmf exhaust

And btw my bike only have 320 miles on it

[Peanut_EOD]

Not a must, but a good damn idea.

[DEXSPEED]

not sure about rejetting but w/ my experience w/ my jardine rt5 s/o it's a must to shim at least.believe me!

[bob706]

Don't know about yoshi or hmf but my mgp growler didn't require a rejet.

[play2pwn]

I heard a lot of good things about MGP exhaust but the design doesnt look appealing to me

Yoshi and HMF are the only ones ive narrowed down to since i can custom the HMF pipe colors

thanks to kkim DIY polishing the rims gave me the idea of runnin a stainless Yoshi or Stainless HMF.

is it a newbie friendly jetting my own bike? new rider here and also his 1st bike i already popped two fuse tryin to add led lights lol.

[kkim]

shim the carb needles. read this DIY and see if you're capable of doing this...

http://www.ninjette.org/forums/showthread.php?t=11963

[play2pwn]

I don't think I have the courage to do that kkim, lol

so no need to rejet? just shim the needles?

what about the airfilters?

I wanna increase the performance a lil bit w/o spending so much money I just need enough acceleration so I'll feel more comfy hitting the freeway. the speed limit is 65mph here in vegas but most people run to 75-90mph everyday.

A lot of people told me why a 250r

I told im a total newbie and from what ive heard its capable of takin freeways with no problem and fuel efficient.

[kkim]

shimming is rejetting. anytime you change the air/fuel ratio, you are rejetting.

shimming is the easiest of all the rejetting you can do to your bike. if you don't feel comfortable to shim it, what were you going to do about "rejetting"??? have a dealer do it?

if you are new to riding, ride the bike, as is, for awhile before making any changes to it so you can get a good idea of it's strengths and weaknesses.

[gfloyd2002]

Originally Posted by play2pwn

Hi fellow members

Im wondering if its a must to rejet my bike if im gonna get just a slipon and im torn between a yoshi and hmf exhaust

And btw my bike only have 320 miles on it

Yes. Your bike likes a particular air/fuel mix. By adding an exhaust you are changing the air part of that ratio. My increasing the air flow, you will be making your bike more lean, and that is hard on an engine. To balance it out, you will need to change the fuel part of the ratio, too, or your bike won't run to its potential. You do that with shimming the needles, putting in new needles or changing the jets. With a slipon, you can probably just shim the needles since the change in airflow isn't that great.

Exhaust manufacturers that say you can run without changing your carbs are blowing exhaust up your *ss to keep you from getting intimidated. Either their exhaust doesn't do jack to your airflow (in which case, what is the point?) or it does. And if it does, you need to change fuel flow. And it shouldn't be intimidating - I was able to change needles and jets on my bike with zero experience thanks to some good DIYs on this forum and some great pics kkim posted on his breakdown process.

But that said, think twice before spending money on that slipon. Make sure you have a full set of gear first. Then think about riding stock for a couple thousand miles and getting used to the bike. After that if you want to upgrade, move to the full exhaust. Much better value and performance improvement can be found there. The slipon is a 1/4 measure at 3/4 of the cost.

[play2pwn]

Originally Posted by gfloyd2002

Yes. Your bike likes a particular air/fuel mix. By adding an exhaust you are changing the air part of that ratio. My increasing the air flow, you will be making your bike more lean, and that is hard on an engine. To balance it out, you will need to change the fuel part of the ratio, too, or your bike won't run to its potential. You do that with shimming the needles, putting in new needles or changing the jets. With a slipon, you can probably just shim the needles since the change in airflow isn't that great.

Exhaust manufacturers that say you can run without changing your carbs are blowing exhaust up your *ss to keep you from getting intimidated. Either their exhaust doesn't do jack to your airflow (in which case, what is the point?) or it does. And if it does, you need to change fuel flow. And it shouldn't be intimidating - I was able to change needles and jets on my bike with zero experience thanks to some good DIYs on this forum and some great pics kkim posted on his breakdown process.

But that said, think twice before spending money on that slipon. Make sure you have a full set of gear first. Then think about riding stock for a couple thousand miles and getting used to the bike. After that if you want to upgrade, move to the full exhaust. Much better value and performance improvement can be found there. The slipon is a 1/4 measure at 3/4 of the cost.

thank you for clearing things up and as far as gear goes I already have my set of gear before I got my bike I've just waited to see the comparison between the cbr250r and the 250r.

the ninja wins by style and performance the only drawback its not FI.

I already talked to a friend he's gonna help shim the needles maybe next week
he just told me that he got 3 bikes in his garage so having this forum and his knowledge will result positively. =)

[kkim]

http://www.ninjette.org/forums/showthread.php?t=9465

[play2pwn]

Thanks for the link kelly

Now where do i get this washers? And what size? 2 washers for a slip on can?
Can i put 2 washers on stock exhaust while waiting for my can to arrive?
And the fuse of the bike too, lol.

[kkim]

use 3mm or SAE #4 washers.

hardware store should have them. if not, ebay does.

2 washers on a stock bike should work. add another when the slip on comes, if you think it needs it. (most likely will)

[U5er]

Hi Guys/Gals,

Rather than create a new thread I thought I'd ask my question here.

See this video:
http://www.youtube.com/watch?v=sHezP...eature=related

I am thinking about buying a slipon for more noise. I don't care about more performance, or rejetting or tuning anything. I literally just want to replace my cheap sounding stock exhaust. I have been trying to find audio clips of the different sounds each make/model outputs. So far, the slipon in the video sounds the best to me. My budget is less than $200.

Question: Has anyone ever seen a WWR Extreme slipon? What slipons do you guys recommend?

[TXJ]

^ I haven't heard of a WWR. But if noise is your main concern, MGP growler will have you covered and are pretty easy to find used for your budget. I've heard one in person and it's LOUD, you can literally hear it coming a mile away. And this is coming from someone who use to have a straight pipe on a harley...

[bdavison]

Originally Posted by kkim

shimming is rejetting. anytime you change the air/fuel ratio, you are rejetting.

No, it isnt.
Rejetting involves not only changing out the main jet which affects your midrange, and top end...but also changing out the pilot jets as well, which affect the idle to low end. Also, adjusting the idle mixture, and changing the needles...and then there is the carb sync. And if you are racing you might be drilling out the slides to get rid of the constant velocity.

Nearly everyone half-arses the job and only changes the main jet...or washers the needles....but that in no way is a "rejet"

[kaiserz]

Just to let you know, If I can go back in time so I can tell myself to get a full system I will.

Don't get me wrong I love my HMF

http://www.youtube.com/watch?v=xrhbG...eature=related
http://www.youtube.com/watch?v=kaiwu...eature=related
here are some vids, might get you an idea on how loud it is.

[U5er]

Originally Posted by TXJ

^ I haven't heard of a WWR. But if noise is your main concern, MGP growler will have you covered and are pretty easy to find used for your budget. I've heard one in person and it's LOUD, you can literally hear it coming a mile away. And this is coming from someone who use to have a straight pipe on a harley...

Thanks for the suggestion. I'm glad you replied because that sound is EXACTLY what I'm NOT looking for. I don't like the deep, throaty, growling, straight pipe type of sound. I like more of a screeching/turbo type. Hard to describe haha. The 2:00 mark on the video I posted is what Im looking for. I see a lot of people riding Yoshi's -- why?

[U5er]

Originally Posted by kaiserz

Just to let you know, If I can go back in time so I can tell myself to get a full system I will.

Don't get me wrong I love my HMF

http://www.youtube.com/watch?v=xrhbG...eature=related
http://www.youtube.com/watch?v=kaiwu...eature=related
here are some vids, might get you an idea on how loud it is.

Hmm, the one on the 2008 Ninja sounds pretty sweet. Thanks for the suggestion.

I also really like the Akrapovic. See the 0:50 mark for the sound I'm looking for:
http://www.youtube.com/watch?v=0PrRzjpAZSs

[kaiserz]

I always get compliments from how good it sounds, and every time I meet up with my friends they know I'm coming (; (also try taking the snorkel out too, it sounds sweet, but don't forget to shim the needles )

Dude I'm pretty sure I know what kind of bike you're gonna upgrade to, http://www.youtube.com/watch?v=4ch6w...el_video_title "1:30"

[U5er]

Originally Posted by kaiserz

I always get compliments from how good it sounds, and every time I meet up with my friends they know I'm coming (; (also try taking the snorkel out too, it sounds sweet, but don't forget to shim the needles )

Dude I'm pretty sure I know what kind of bike you're gonna upgrade to, http://www.youtube.com/watch?v=4ch6w...el_video_title "1:30"

Damn that sounds awesome.

[ricochet08]

i got a quote on insurance for the daytona.....omfgoodness....it's 10% of my salary

[kaiserz]

Originally Posted by U5er

Damn that sounds awesome.

I know. . . it's pure seks...

and damn! 10% of your salary! I don't know how much your salary is, but you "put on salary" means you're getting a lot of money than the "per hour" people. . . (That means I need to study and get an awesome paying job to get it!)

[ricochet08]

salary = over worked & under paid

[bdavison]

Originally Posted by ricochet08

salary = over worked & under paid

You got that right...it also means when the hourly folks get their raises, you wont because...afterall your on salary, and if they start making cuts...they dont look at the hourly employees that actually make more than you for less work...they start wacking away at the salary folks.

If your employer wants to put you on salary, say ok, but i want a yearly review with raise based on hours worked and performance.

Most of us salary workers do overtime like its free, and never get payed any extra for it...even though its illegal for them to do that.

[rusninja]

if slip on akrapovic is the sexiest

[kaiserz]

I feel you guys ): I'm salaried too. and yes it is more hours less pay D:

[ninjaknobs]

Originally Posted by play2pwn

Hi fellow members

Im wondering if its a must to rejet my bike if im gonna get just a slipon and im torn between a yoshi and hmf exhaust

And btw my bike only have 320 miles on it

Check out my album, i bought a hmf carbon slip-on when i first got my bike. It sounds awesome.. deep and crackles/pops when you quickly back off the throttle. I bought on ebay claiming it was made for a ninja 250, put it on it didn't quite reach the exhaust hanger so i used a longer bolt. Stock muffler weighs 12 lbs i think.. hmf 4 ! big savings.
I decided to buy a yoshimura stainless steel full exhaust down the road, the header is really nice.. sounds good hmf sounded a tad better but i think the yoshi looks/fits better. actually i'm listing the hmf on ebay this weekend, along with yoshimura black bar ends.
re-jetting is highly recommended, i bought a k+n filter and dynojet stage 2 kit. Kit said to remove "snorkel" in the airbox to allow more air in. Big job let me tell you, have a pic in my album of my big tore in half haha. With dad's help, installed #98 main jets and needles from the kit. Put it all back together and WOW low end/midrange is almost double and high rpms up to redline pulls great.. doesn't fall on its face. If you want to spend a little extra.. get the yoshi full exhaust, it removes both catalytic converters to breathe better

[ratlab]

take a look a leo vince -i use them on all my bikes -they make good power and have quality finish-super loud with baffle out -sounds ok with baffle in