are all the jets and jet kits the same like fmf jet kit and a dynojet jet kit, are they the same,my buddy and i are running the same main jets and are carbs are jetted exactly the same, but his bike is running faster,was just wondering.

 

same quad? same mods? same weight?

 

No, mikuni jets, and dynojets flow rates are different. Example: 190 dynojet main jet flows the same as a 175 mikuni main jet. The fmf kit is made by dynojet.

 

Are you sure thats not the other way around? cuz when I got my raptor back from getting it jetted, the guy gave me the rest of the jets and the dyno jet package which was a stage 2 and all the jets were like under 150 which is around the stock #'s for the mikuni's, so why re-jet lower?

 

The dynojets flow more at the same number, meanging that a 175 mikuni would flow less than a 175 dynojet.

 

thats what I thought, I was wonderin why my stage 2 jet kit would come with such small jets...

 

Sorry fellas, go to ds650 {dot} net. Go to the mikuni vs dyno jet section. There is a great chart there that compares sizes. When I was jetting my ds, it required a 175 mikuni main jet, or a 190 dynojet main jet. These 2 jets flow exactly the same.

 

Have you ever used dynojets? If you have then you'd realize that a dynojet flows more at the same number than a mikuni. Every chart that I've ever seen on the intertnet is wrong. Includling the one you speak of at the ds650 site.

Gosh I really get annoyed with the bull$hit forbidden words in this place.

 

Well, dealerships are out to make money, not hire the best tuners/mechanics. The guy doing the jetting probily doesn't know about the difference between dj and mikuni. I had to learn the hard way. My ds came stock with a 165 mikuni mj. I was told to rejet to a 175. I used a dj 175 jet. It ran worse. After a long search, I found out about the difference. I did need a 175mj, a mikuni 175 mj. All I had was a dj kit. I used the chart on ds650 [dot] net to find out that a dj 190 mj is the same jet as a 175 mikuni mj. I dont know what your raptor takes, but take a look at that chart.

 

Dyno jets are sized by the hole dia. 175 means 1.75mm hole. Mikuni jets are sized by how many cc of gas they flow per min.