News:

This forum is run by RPM and donations from members.

It is the donations of the members that help offset the operating cost of the forum. The secondary benefit of being a contributing member is the ability to save big during RPM Holiday sales. For more information please check out this link: Membership has its privileges 

Thank you for your support of the all mighty FJ.

Main Menu

Stock jetting and needle position?

Started by Tor-King, October 23, 2012, 08:35:17 PM

Previous topic - Next topic

Tor-King

Hi guys!

I am in the process of reverting my carbs back to stock.  I am dumping the 4-1 and going back to the original exhaust.  I know this seems ass backwards as many are upgrading their systems but...I am a sucker for the 4-2 and I do like the way they look on the FJ.  I did some digging and found a posting from andyb about proper jetting but did not find anything about needle position.  The needles in the carbs are probably dynajet with different circlip positions.  Where should they be placed which would be considered close to stock.  I just need a starting point.  Also, what jetting would you all start at?  Should I go with 112.5 main and 37.5 pilot?

Thanks a bunch!  You are all a wealth of information! :good:

Cheers,
Dean
1993 Yamaha FJ1200
1988 Yamaha FJ1200
1986 Yamaha FJ1200
1984 Honda Nighthawk S 750
1972 Yamaha XS-2
1972 Honda CT70
1974 Honda CT70
1992 Yamaha DT50 MX
2012 Honda CBR250R
2008 Honda CBR125R

fj11.5

depending what Fj you have , stock needle settings would be 2/3rd clip slot from the top , and your jets should be good to go
unless you ride bikes, I mean really ride bikes, then you just won't get it

84 Fj1100  effie , with mods
( 88 ) Fj 1200  fairly standard , + blue spots
84 Fj1100 absolutely stock standard, now more stock , fitted with Fj12 twin system , no rusted headers for this felicity jayne