• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

?

  • Thread starter Thread starter sharpy
  • Start date Start date
S

sharpy

Guest
Ok we all know main jets are labled in actual points of mm's but what are the pilot jets labled in. Fuel flow or size. As corrisponding jet drill sizes dont match. thanks
 
All I remember about that is that when comparing Mikuni and DynoJet numbers, one of them is the actual size, the other is the flow rate.
I just don't remember which is which. :o

.
 
Hi,

That's a good question. The Mikuni main jets are based on flow rate and the Dynojet sizes are based on actual size. I've found many sites quoting this information:

http://roadstarclinic.com/content/view/61/96/

But I haven't found any information on the sizing criteria specifically of pilot jets. I'm sure the answer is out there somewhere.

X-files%20-%20The%20Truth%20Is%20Out%20There%5B2%5D.png



Thank you for your indulgence,

BassCliff
 
sharpy said:
Ok we all know main jets are labled in actual points of mm's but what are the pilot jets labled in. Fuel flow or size. As corrisponding jet drill sizes dont match. thanks
Click to expand...

Good question. ;)

Daniel
 
I've been asking the same thing and just found this on a Mikuni/Dyno Jet Conversion site: (http://roadstarclinic.com/content/view/61/96/)

DynoJet jets are marked according to the diameter of the hole in the [SIZE=-1]jet .. ie: DJ150 = 1.5mm and DJ175 = 1.75mm. [/SIZE]
[SIZE=-1]This is not true for Mikuni or most other OEM equivalent jets. This size[/SIZE] [SIZE=-1]Mikuni jet, (N102.221 Super BN), is marked according to its' flow rate,[/SIZE] [SIZE=-1]ie: 150 = a rating of 150 cc of fuel per minute.
Click to expand...
[/SIZE]

I'm still checking to see if I find anything different.
 
sharpy said:
Ok we all know main jets are labled in actual points of mm's but what are the pilot jets labled in. Fuel flow or size. As corrisponding jet drill sizes dont match. thanks
Click to expand...
Sharpy, as said by others already, main jets are not "labeled in actual points of mm". Sizing is determined by flow rate in cc's per minute (Mikuni) or actual hole diameter (DJ). I don't see why pilot jet sizing would be any different.
One thing to consider if you go ahead and drill out the PJ's bore: will the increased bore work well in combination with the multiple aeration holes surrounding it that are still the original size? Before drilling, just check some larger PJ's and verify that the aeration holes don't get larger or more in number as the PJ size increases.
I've never drilled ANY jet so your question just brought the above to mind. I've also never compared the size of the atomizer/aeration holes before and I'm too lazy to go out to the garage and dig.:lol:
Probably a non-issue but worth a look?
 
You must log in or register to reply here.
Back
Top