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OK folks,

here's another question for yaz.

Like I've stated in previous posts, I have recently installed a Scorpion slip-on exhaust onto my 2002 Yamaha YZF 600R.

It runs really nice, but there is a slight flat spot (hesitation), in the lower rpm's...especially when the bike is moving and I "gun" the throttle.

So my question is:

1) What is a GREAT, highly recommended, jet kit that I can install? (Not a mediocre one, but one that the majority of yall will say, "Hey, that's a trick jet kit")!!

2) If I chose to take the path of a jet kit, should I take it to be "dyno tested" as well? (Is it expensive, and is this an important step in getting it jetted)?

3) My bud (who has an R6), say's that he got the "Dyno-Jet" jet kit, and it cost him approximately $150.00. (But he also said that with his purchase, he received a coupon that he could take to any dealership who can do a "dyno test," and that they would "dyno it" for free - with the coupon).

Does that sound right? And reasonable?

Thanks folks, your opinions are really helping me out in making my decisions!!!!! /images/icons/smile.gif

In Christ: Raymond
 

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Dynojet make lots of kits for bikes, and they are recognized and popular in the marketplace. However, the brand of the kit is very much secondary to the experience of the guy installing it. Ideally, you'd use a shop with experience racing an R6, because they should be most able to get the best, smoothest powerband out of the bike.

As for running the bike on a dyno - That'll allow the shop to see the effect of any changes made. This way you can get real gains, instead of "Awesome Top End Rush" that is really a 5~10HP hole in the midrange followed by stock power. (Don't laugh - It really does happen!)

It sounds like you're running a little lean - Instead of spending $150, you may just need to install a couple shims to richen it up a little. A good shop will be able to tell you what's really needed.

Scott /images/icons/smile.gif

 

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One thing that impressed me with my Factory jets were the instructions. They had various, easy to understand settings based on different setups as well as altitude.

Gravity is a cruel mistress.
 

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I have to go with Scotteq and say that my experience, and all my friends, is that it is far more important to get SOMEONE WHO KNOWS WHAT THEY'RE DOING!

Factory, Dynojet and Ivan's all make good jet kits, and frequently they come with enough parts to do minor tweaking to suit your elevation, etc.

That being said, I would also say that I think you just need a 'shim' installed like was mentioned above. It goes on the needle and will probably richen things up just enough to cure that hesitation you have.




BA
"<font color=blue>How about never, is never good for you??</font color=blue>"
 

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If your going to get a jet kit the only way of knowing your gaining anything is to get your bike dyno tuned.. My cousin just had a slip-on, and a foam performance air filter and the dyno showed he had no flat spot.. and he had 98 bhp.. dang why couldn't I have his engine.. So he didn't even waste his money with a jet kit. where I had the same mods and I had a flat spot and the way factory told me to setup the jet kit I lost hp but got rid of the flat spot.. So I'm going to the next size jets and seeing what it shows on the dyno.. cha ching.. that's my .02 cents

<font color=red>SilverF4/images/icons/cool.gif
<font color=blue>"Respect the Wrist!!!"
 
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