Sportbikes Motorcycle Racing Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
611 Posts
Discussion Starter #1
Since no one answered this question before the crash, I thought I'd try again while we're rebuilding.

Has anyone shimmed the stock needles in their F4 a la last month's motorcyclist's magazine? It didn't look that hard, but I want to hear from someone whose done it before.

Live fast, die young, and leave a good looking corpse.
 

·
Registered
Joined
·
577 Posts
shimming the needle isn't hard atall. they have been doing it for years. the old gsxr i used to shim my needles all the time every weather change . I would just go out and spend the money on a jet kit , you get better needles, springs jets everything. aftermarket needles are shaped alot different then stock ones, the taper changes the fuel. There is no cheep way to HP my friend , if you want the power it cost money

Just my 2 cents
ErionCBR
 

·
Registered
Joined
·
1,655 Posts
I never shimmed the stock needles, from what I can tell it's pretty easy, but a pain cause you have to worry about dropping the washers when putting the needle back in.. At least if you do it while the carbs are in the bike. For peace of mine I would just get a jetkit, cause the needles are grooved and an E-Clip is used when positioning the needles where you want them. You also need a dyno to really get it right. I installed my jetkit the way DynoJet said to and I have to go with next size jets cause I didn't gain anything, except I got rid of the flat spot. I had pictures of the whole thing while I was doing it, but can't seem to find them.. If I do find them I'll post them. cause it was sort of a pain to do it while the carbs were in the bike.

<font color=red>SilverF4/images/icons/cool.gif
<font color=blue>"Respect the Wrist!!!"
 
1 - 3 of 3 Posts
Top