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Rejetting the FCR?

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I tried to find a topic or guide on it and couldn't find it. My FCR didn't come with a manual and I need to rejet the FCR are it's running too rich. How do I go about doing that?

My guess is I could leave the carb on the bike and remove the fuel bell and have access to it?

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You can loosen up the clamps and turn it and you

Can gain acces but I prefer removing it rather the twisting. Easier for me.

If you have to mess with all the jets, main, pilot etc and do fuel screw I would reccomend removing it so just the cables are attached

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running too rich on which circuit?

You mean like idle, mid-range and full? If I recall the main jet is for full throttle? If so, that's what's being replaced. I have a 160 in there now and I ordered a 150 and 155 we're going to throw in there and see. Our local dyno guru for the area took a look at it last night and did 3 runs. I can scan the dyno sheet if you would like.

I couldn't find any instruction manuals on how to replace the jets though?

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So your local dyno guru can't help guide you thru what to change.??...Perhaps he is not such a guru after all....

Posting the dyno chart with air/fuel ratio would be helpful....and what engine mods ?

If you have an open pipe , at near sea level..the 150mj won't be in the ball park..

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So your local dyno guru can't help guide you thru what to change.??...Perhaps he is not such a guru after all....

Posting the dyno chart with air/fuel ratio would be helpful....and what engine mods ?

If you have an open pipe , at near sea level..the 150mj won't be in the ball park..

He said he would charge me the flat rate as long as I did the work myself, but I could use his shop when we dyno with as many runs as needed to get it going good. He dyno'ed my FI'ed bike flawlessly with 4 extra HP just with a power commander (Ninja 650r) and done much more impressive things with other bikes.

I'll post the dyno when I get home with A/F. The jetting feels off when riding it and so does the idle. I'm at sea level with an mrd open pipe, big bore, fcr, cams.

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Here's my run. 434 big bore, fcr 39mm, cams, mrd.

100-200 ft above sea level.

160 main jet

200 main air jt

EMP needle

clip 3

45 pilot jet

no pilot air jet

2.25 turns fuel screw

ap link wired

delayed 1/2 turn

Edited by UrbanTerror

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Yep....install the 155mj for improvement...I always am impressed by the way the ssw/mrd holds the top end longer than other pipes...

The dyno is a test of main jet...You could ask you guru to do some mid throttle runs to check needle setting...

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Just drain the bowl and take it off and should be easy from there?

I bought a 155, 150 and 145. If I don't need the others I'll sell them. Depending on which one I use I'll keep a size leaner for the summer.

Here is what he did to my 650. Perfect A/F ratio throughout the rpm's.

Edited by UrbanTerror

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Loosen boot clamps and turn carb a little ,No need to remove bowl just undo plug in middle of bowl....6mm socket for main jet...be careful not to over tighten mj when installing..it needs minimal amount of torque...

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