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Title: Jetting FCR's Post by: Some Dude on May 09, 2008, 11:37:09 AM I'm trying to do this right now, and in the interest of getting some info about it on this site, I thought I'd start a thread and post a couple links i've found very helpful. Please add any tips or tricks you may know
Thanks http://www.ducatitech.com/2v/fcr_faq.html (http://www.ducatitech.com/2v/fcr_faq.html) http://www.keihin-us.com/tune.htm (http://www.keihin-us.com/tune.htm) http://www.factorypro.com/tech/carbkei.html (http://www.factorypro.com/tech/carbkei.html) Title: Re: Jetting FCR's Post by: oppet on May 13, 2008, 08:16:30 AM Those are good links.
If we tell the mods that has been done and what jetting we have. espesially if you have 944 kit, it may be hard to find correct settings, unless you try and try. Those jets aint cheap(1Xslow jet= 17,5 euro in finland) I have pod filters, open frescos,m900,41mm fcr and I live at sea level my settings are: Fuel screw 3/4 turn Slow Air Screw 1 turn Float height 9mm Main Jet 155 Main Air Jet 200 Slow Jet 60 Needle EMT Needle Clip 4rd from top And now it runs great. Title: Re: Jetting FCR's Post by: greenmonster on June 18, 2008, 04:38:58 PM Mine: 41mm`s, polished/matched ports, 900SS heads, 0.94mm squish, HC, TCI-P4 ignition, Dynas, SilMoto high.
Settings: Fuel screw 1,25 turn Slow Air Screw 1,5 turn Float height 9mm Main Jet 162,5 Main Air Jet 200 Slow Jet 60 Needle EMT Needle Clip 3rd from top FCR are very sensitive to sync. Title: Re: Jetting FCR's Post by: m9hundo on June 25, 2008, 02:30:11 PM I just picked up some FCR's in a trade. The thing is they're 39's and I have a 99 900. Mods are 2 into 1 exhaust and pod filters. Any suggestion guys? I know 41's are in order but was told that I could make these work.
Thanks - Gil Title: Re: Jetting FCR's Post by: greenmonster on June 25, 2008, 04:57:55 PM My friend w a M900 -98 w 750 heads had 39`s, they worked excellent.
Dunno his jetting unfortunately. Title: Re: Jetting FCR's Post by: printman on June 25, 2008, 05:43:32 PM on a 93 900 SS and 41's
have: 58 slow circuit, air screw at only 1 turn, 4th clip on needle (1 down from center) and stock 155 main not the 39's but maybe a benchmark Title: Re: Jetting FCR's Post by: dlearl476 on June 25, 2008, 08:16:03 PM I know 41's are in order but was told that I could make these work. Thanks - Gil I'm sure you can. They'd be better on a 750, but for street riding I think they'd be fine. I'd suggest you pick Chris' brain at CA-Cycleworks. Title: Re: Jetting FCR's Post by: m9hundo on June 25, 2008, 08:55:46 PM I shot chris an email but from what I've heard he's a pain to get a hold of.
Title: Re: Jetting FCR's Post by: knightrider on June 25, 2008, 09:14:29 PM email is prolly the best way to reach him, lets just say hes got lots of little projects. and me stopping by annoying him by asking him questions, oh and spending money :D
Title: Re: Jetting FCR's Post by: m9hundo on June 27, 2008, 07:10:53 PM I have a issue with the 39 FCR's. I plugged in the fuel line and clamped it down HARD and theres fuel leaking at the junction. WTF? is there a seal or something missing here.
TIA - Gil Title: Re: Jetting FCR's Post by: dlearl476 on June 28, 2008, 06:50:00 PM email is prolly the best way to reach him, lets just say hes got lots of little projects. and me stopping by annoying him by asking him questions, oh and spending money :D Then add in my dumb questions and his inbox gets pretty full. He will get back with you. About your leak, take a look at an exploded view. http://www.motorcyclecarbs.com/keihin/frames/FCRDframe.htm Lots of O rings in there. |