Raptor Jetting Help.. Please!
 

I ordered a full Big Gun Exhaust package w/ a proflow setup, a K&N w/ Outwear and, it came with a Stage 2 Dyno Jet kit. In the Jet Kit instructions it says to use the 2 biggest jets in the kit (146L-148R) for a full exhaust w/ modified lid. BUT,,, When I called Big Gun (while I was waiting for my Package) they told me to Run 150L-155R w/ lid on and, 155L-160R if I run the lid off. Do you think I should even try it the way it is stated in the Dyno Jet Kit or, call and, complain?? There is a huge difference in what i got and, what Big Gun recomends. Also the Dyno Jet Kit comes in increments of 2 from 136 to 148, there are not odd #'s like 155.

Please help if you can, i'm dying to get this together at test it but, want to do it right the first time (if possible).

Thanks A Lot!!!

Raptor Jetting Help.. Please!
 

I think I would do 148/150dj mains

the big gun people were probably telling you in mikuni sizes........

Raptor Jetting Help.. Please!
 

yep, that's exactly what came to my mind.

Raptor Jetting Help.. Please!
 

The Yamaha Spec Sheet Says i have Dual Mikuni 33mm BSR's? So do you mean i have something different than Mikuni's or, Mikuni's jet sizes are different?

And, the biggest in the dynojet kit is a 148. It is there "Supposed" Dyno Jet Stage 2 jet kit. Am i screwed??

Do you think I can try the 146L-148R like the DJK says?

Raptor Jetting Help.. Please!
 

I have heard bad things about the dynojet kits, particularly the high price. I have a full big gun with same filter set up except I run with the lid off. I bought my jet kit from Yamaha. The GYT-R kit has odd sizes with larger increments. I ran what big gun recommended because it also was what Yamaha recommended for their exhaust, and it seems that I could go up more on the mains, that or switch to a foam filter. Big gun also has a list of jetting options on their website at biggunexhaust.com. As far as being right the first time, I hope you are extremely lucky!

Raptor Jetting Help.. Please!
 

Dynojet mains are numbered differently than mikunis. I would order a 150 main from dynojet and put in the 146/148 and run it with the lid on til you get the 150 jet.

Raptor Jetting Help.. Please!
 

I have the dynojet kit. Im fairly happy with it.

What help do you need??? What does your plug look like?

Raptor Jetting Help.. Please!
 

Bing,,,,, I have not put it in yet because i wanted to get some insight from the "Forum Guys" who know way more than me first. I'd like to make it as painless as possible and, got stirred off the bat when i saw that the jets in the kit where no where close to what BigGun told me. What sizes are you using and, what lid and, air filter setup do you run?

Raptor Jetting Help.. Please!
 

So, should I try the Dyno Jet Kit w/ the biggest sizes or, send the crap back and, get bigger sizes?

Raptor Jetting Help.. Please!
 

I have a dynojet kit also....it is supposed to have a 150 in the box....if not you got screwed....call them and make them send you one.....

also....I would run the 146/148 needle on 4th clip and see how it runs and do a plug test.....if it is lean....put in the 148/150(I would seriously make them send you one if you didn't get one with the kit......mine came with it....)