I got a Dyno Jet kit and a Mikuni jet kit and I've heard here there is a difference in how they number the jets such as a Dyno jet #180 is smaller then a Mikuni #180 or is it visa a versa? and is there any real difference between the two manufactures?

 

http://vmaxoutlaw.com/tech/dyno-mikuni.htm

 

Got it!

Thanks.

 

thanks for the update on the axle bearings oldmanracing

 

Yeah, that chart is wrong...

A 150 DJ will flow more than a 150 Mikuni, the chart is wrong.

 

I have this same chart from 3 different organizations.
All DS650 and F650 folks have accepted this chart.
What chart do the folks at Yamaha use?
I also have 4 Yamaha's in the garage to match the 4 Bombardier's.

 

Well think about for a second. What jets does a bike use in mikuni sizes? Do you run a bigger DJ in the same bike if you switch jets? When I do I run a lower number. In BSR Mikunis a 146 DJ is somewhere around 160 in a Mikuni.

 

Maddog, you have it backwards. A mikuni has a smaller number than a dynojet. Mikuni jet size is measured by its flow rate. A dynojet is measured by the hole diameter in the jet....I.E. a 175 mikuni = a 190 dj. A145 mikuni = 160 dj.

 

Scoundrel.....there is a diff in the jet #'s. Also if you are using mikuni jets stay with the stock needle. If you plan on running a dj kit, use the dj needle. The needles seat differently in the jets. As long as you don't mix the two you will be ok. I had a dj kit in my ds for a bout a year. I went back to mikunis. The dj needle wore out to quickly. Also the dj jets arent as true as they should be for my liking.

 

Experience tells me otherwise, as well as just about every other raptor owner. But hey, if it works for you go for it.