Need some help with carb set-up

Reply Subscribe

Thread Tools

Search this Thread

Jul 20, 2006 | 04:47 PM

kansasroadking

Thread Starter

Road Captain

Joined: May 2006

Posts: 720

Likes: 2

From: Kansas

Need some help with carb set-up

Hey guys... I need some help, or suggestions on where to start with tuning my carb, it's a '06 RK, 95", flattops, S&S 510g cams, zippers adj. ign., stock heads, free flowing slip-ons, I've read almost every post about jetting and carburetors, including the entire diy section, 99% of the info pertains to 88" with ac & exhaust mods,
quote from TCSTD;
"A tried and true for "most" carbs in twin cam bikes for rejetting with intake and exhaust mods would be on the low speed jet 45/46 (46 being the best usually), and on the high speed jet would be 185/190 (190 usually being stock). Install 2 - #4 washers (available in most hardware stores) under the main jet needle to raise it up .050 (see detail below), and readjust the idle mixture to the highest and steadiest setting, usually found about 2 1/2 to 3 turns open after LIGHTLY seating it and backing it out."

would this mod be enough for 95" and the cams? if not, does anybody have any recommendations on where to start? or what
is your carb set up with 95" and similar cams?

Thanks for any and all suggestions/recommendations

Kevin.

Jul 20, 2006 | 05:12 PM

liltrk

Road Warrior

Joined: Jan 2006

Posts: 1,823

Likes: 4

From: London, Canada

RE: Need some help with carb set-up

I have a similar setup. 2000 EG, K&N filter, 95 inch flattops, 510G, ported/lightly polished, stock valves, stock ign, megaphone slip ons. Here is what I have done.

I took the 45 jet and drilled it out two drill sizes. I'm not sure what jet that is equal to. Fuel mileage dropped dramatically. Ran well. Would not idle cold.

Drilled another one out one drill size. Mileage is back up where I think it should be. It spins the tire, runs well, really strong from 2000 up, but still won't idle cold.

I have the mixture screw turned out about one turn. Any further out and it coughs coming off idle.

My choke (enricher) slips back in when I start the bike, so if I can tighten it, it might cure the idle prob.

I have not changed the high speed jet at all, nor washered the needle.

Next week I am going on a 5000 mile ride with two other carbed 95 inch bikes. I am going to compare fuel mileage, etc.

These are not necessarily recommendations, but just what I did.

Good luck with yours.

Jul 21, 2006 | 01:54 AM

kansasroadking

Thread Starter

Road Captain

Joined: May 2006

Posts: 720

Likes: 2

From: Kansas

RE: Need some help with carb set-up

Thanks liltrk, good info, just what I'm looking for... anybody else?

Jul 21, 2006 | 11:51 PM

murphdog

Road Master

Joined: Jul 2005

Posts: 916

Likes: 3

From: Mauldin, SC

RE: Need some help with carb set-up

kansas, the '88 Sporty needle (27094-88) works pretty good. I've been running it for 3 years or so in my wide glide with 95", 203 cams and air cleaner/pipes. I tried the shimmed stock needle but the Sporty needle feels a lot "crisper". The stock 45 slow jet works good for me and either the stock 190 or a 195 main. The 195 seems to work better with the Pro Pipe I have on now.

liltrk, you can tighten up the choke with the knurled plastic nut immediately behind the choke ****. Finger tighten it a little until the **** will stay out. It's plastic, so take it easy.
What size bit did you use to drill out your slow jet? A 45 jet is 0.0177" (0.45mm). A #77 bit would open it up to 0.018"(0.4572mm), or just shy of a 46 jet. Anything more would be way too much, a #76 bit would be 0.020"(0.508mm) or about the equivalent of a 50 jet.

Jul 22, 2006 | 05:21 PM

kansasroadking

Thread Starter

Road Captain

Joined: May 2006

Posts: 720

Likes: 2

From: Kansas

RE: Need some help with carb set-up

Thanks murphdog, did you drill the slide?

Jul 22, 2006 | 06:21 PM

1941ratrod

Advanced

Joined: Apr 2006

Posts: 82

Likes: 1

From:

RE: Need some help with carb set-up

Quit f%*king around w/ the stock carb you spent the money on a good engine go out and buy a Mukuni 42mm or an S&S super E you will be glad you did they sell cheep on e-gay

Jul 23, 2006 | 12:53 PM

murphdog

Road Master

Joined: Jul 2005

Posts: 916

Likes: 3

From: Mauldin, SC

RE: Need some help with carb set-up

kansas, I did drill my slide when I originally used a Dynojet kit. The dynojet kit is long gone as I could not get decent mileage with it. I don't believe drilling the slide hurt me, but I wouldn't do it again.