Factory jet kits

[Eric_The_Jew]

This is specifically directed at Factory jet kits (not Dynojet). I'm looking at buying one for my '98 but I had a few questions. Does this kit come with a wide assortment of main jets and needle washers? Or is it simply one set of mains and one needle/clip combo that is supposed to work for all combinations (slip ons, stock cans, 4into1 full system, etc.).

If the kit indeed comes with different sized jets, do the instructions tell you their recommended jetting combinations for slip ons, stock, full sys, etc.?

[cbrbear]

Ok Factory jet kits come with 4 adjustable needles usually 8 e clips, depending on the application I have had up to 3 different size main jets and 2 different size pilot jets provided along with new screws for tops and bottoms of the carbs (nice allen head instead of stripping phillips) they also give you a chart for specific arrangements. I have a spare TI kit here at the house that I will be installing as right now I have the standard kit in the bike.

[cbrbear]

just an FYI I get factory parts at a 50 percent discount. I opened my TI kit and here is what it had. 4 adjustable needles, 8 e clips, new bowl screws (bolts really with allen heads) some tool, 4 sets of main jets, stickers, and directions for 3 different exhaust/intake combo's.

[Eric_The_Jew]

Thanks for the info, cbrbear. The Factory brand needles have 4 different clip positions, but they give you 8 clips? (are they just throwing in some extras in case you break them??)

Also, would you mind sharing what exhaust pipe/intake combinations that they have listed in the instructions? Thanks.

[cbrbear]

There are 5 needle positions, one clip per needle, they give you 4 extras incase you loose them. They can be a bugger to put on and sometimes fly acrossed the garage so there are spares. The cominations are:

w/stock pipes SS2r/Zyclone

w/aftermarket race exhaust

w/above and BMC / K&N air filter

now my CBR1000F kit was a lot more explicit with details as far as application but I dont think that there are any major differences between slip ons or race exhausts these days, minor but not major enough to with the jets provided you cant make it work.

Factory even has a setting for improved stock performance with no slip ons and thats change outter carbs (cylinders 1 and 4) to a 142 main jet and put 1 shim under each needle, I think thats the setting but its supposed to add a few ponies to a stock bird. This is from factory racing not my personal experience.