 FCR 39's
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Joined: Feb 2005
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3/4 Throttle
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OP
3/4 Throttle
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Has anyone tried or installed the FCR 39's on our bikes yet? They look pretty tempting and I have been wanting to try some new carbs but just not sure which ones I want. Right now I am leaning towards the FCR's from Bella Corse. I have an FCR on my KTM and it seems pretty decent with no problems or issues. Any comments?????? 
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Re: FCR 39's
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
i have heard a little about these. a guy with a thrux over on the rat site has them and really likes them. but he had additional motor work. i also heard they can be a tad tricky to dial in. i have mikuni 42's on my bike, i feel they are to big for a stock motor to take advantage of them. althought my bike runs better with them i did not gain anything on a dyno. but that will all change this year. so in short if you plan on future mods then go for them, if not it may not be worth the expense unless you have the money and its not a big deal to you financially
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: FCR 39's
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Joined: Aug 2006
Posts: 153
Adjunct
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Adjunct
Joined: Aug 2006
Posts: 153 |
Quote:
i have heard a little about these. a guy with a thrux over on the rat site has them and really likes them. but he had additional motor work. i also heard they can be a tad tricky to dial in. i have mikuni 42's on my bike, i feel they are to big for a stock motor to take advantage of them. althought my bike runs better with them i did not gain anything on a dyno. but that will all change this year. so in short if you plan on future mods then go for them, if not it may not be worth the expense unless you have the money and its not a big deal to you financially
Frank
Thats quite the contradictrion there...it runs better but the dyno #'s are the same. I cant imagine not gaining anything on a dyno by adding 42mm carbs...something is wrong with this picture.
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Re: FCR 39's
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
i put out 62 with my stock carbs and 62 with the 42's, i think the power band may have been made larger but no more peak power
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: FCR 39's
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Joined: Jan 2005
Posts: 6,308 Likes: 4
Worn Saddle
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Worn Saddle
Joined: Jan 2005
Posts: 6,308 Likes: 4 |
do some searching on them Ron. From what I have read anyway it seems they are very prone to flooding at a stop. They are made more for higher RPM use such as racing and such.
I have never used them myself but this is a very big topic for discussion on a lot of other forums. They are the carb of choice for the triples that race pro.
Edit:
So, I looked at Mark's site and they do indeed look very interesting, and at a very good price. Go with the standard race package and save the $100 if you go with them.
They certainly sound like a very good deal. But call Mark and let him know you have the 904 as well so the jetting will be closer.
Oh, and you will need air filters, do not run them with just the velocity stacks, pods at the minimum.
Last edited by Dinqua; 01/05/2008 9:19 AM.
A word to the wise is not necessary. It is the stupid ones who need the advice.
Pat
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Re: FCR 39's
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Joined: Aug 2006
Posts: 153
Adjunct
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Adjunct
Joined: Aug 2006
Posts: 153 |
I gained 8rwhp from installing 42mm carbs on my 904....and theres a guy on rat.net that put them on a stock 790...who also gained.
I'll say it again...I cannot imagine installing 42mm mik's and not gaining anything. Something is wrong with this scenario.
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 Re: FCR 39's
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Joined: Feb 2005
Posts: 988
3/4 Throttle
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OP
3/4 Throttle
Joined: Feb 2005
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I am running a 904 BB and I definitely gained with the BB but I want more. I just don't know which setup to go with, I know Dinqua and Biker are running the Mikuni's with good results but I am thinking about trying something different and leaning towards the FCR's. I also would like to see someone come up with a good set of cams but it sounds like it is hard to improve on the original equipment. I am still doing some research and need to make a decision soon.
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Re: FCR 39's
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
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they should come into there own when i get my 904/oversize valves back together and on the dyno
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: FCR 39's
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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Re: FCR 39's
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Joined: Feb 2005
Posts: 988
3/4 Throttle
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OP
3/4 Throttle
Joined: Feb 2005
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Last edited by 69tri1; 01/08/2008 2:50 PM.
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Re: FCR 39's
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Joined: Feb 2005
Posts: 988
3/4 Throttle
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OP
3/4 Throttle
Joined: Feb 2005
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OK, just got off the phone with Mark from Bella Corse and he has one set of FCR 39's left on the shelf but he will be receiving more in about a month or so. He will also be receiving the same setup but with FCR 35's that he is saying might match up better with our bikes. He told me that if I can wait for the 35's it might pay to do so. He also stated that he already has some FCR 35's sold and will be shipping as soon as they come in and he would be able to give feedback when I am ready to make my purchase. It sounds like I am going to go with this setup whether it be the 35's or the 39's. I like the fact that these carbs mount and use the exact same linkage setup so it is almost a direct bolt on. I will keep you posted. 
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Re: FCR 39's
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
"is almost a direct bolt on" just small bend on linkage tubes are needed and u are done (with 35) 
Last edited by Grzegorz; 01/08/2008 3:29 PM.
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Re: FCR 39's
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Joined: Jan 2005
Posts: 1,204
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,204 |
Quote:
I am running a 904 BB and I definitely gained with the BB but I want more. I just don't know which setup to go with, I know Dinqua and Biker are running the Mikuni's with good results but I am thinking about trying something different and leaning towards the FCR's. I am still doing some research and need to make a decision soon.
Try the S&S SUPER G'S SHORTY. It's a new carb but has the adjustability for our motors, but you will have to machine the intakes......ANGELIS
1200CC BIG BORE, W/WISECO PISTONS,.250 STROKED CRANK, PORTED/POLISHED HEADS AND LARGER VALVES, CUSTOM WELDED EXHUAST, DUAL 42MM MIKUNI CARBS.
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Re: FCR 39's
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Joined: Mar 2007
Posts: 3
Complete Newb
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Complete Newb
Joined: Mar 2007
Posts: 3 |
try a look at these,, edelbrock carb kits made for harleys but easily adaptable to our bikes in a range of sizes. I am going the 1200 kit later in the year and thought of using the edelbrock 42's??? take a look http://store.edelbrock.com/completecarbkits.aspx
OldSkool
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Re: FCR 39's
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Joined: Jan 2005
Posts: 1,204
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,204 |
Quote:
try a look at these,, edelbrock carb kits made for harleys but easily adaptable to our bikes in a range of sizes. I am going the 1200 kit later in the year and thought of using the edelbrock 42's??? take a look
http://store.edelbrock.com/completecarbkits.aspx
I have two 38mm carbs from Edelbrock. You still have to do mods to mount the air cleaner......ANGELIS
1200CC BIG BORE, W/WISECO PISTONS,.250 STROKED CRANK, PORTED/POLISHED HEADS AND LARGER VALVES, CUSTOM WELDED EXHUAST, DUAL 42MM MIKUNI CARBS.
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