carb question

[Hawkeye]

Have just rebuilt my engine (top end), fitted new Andrews cam E27 and some slash cut mufflers. It's running a little lean at tick over and pick up from tick over is not to good.

My bike is an FXR 92, but it has a carb not unlike an S&S in that it has butterflys.

What i want to know is where is the mixture screw, or pilot screw,i cant find it anywhere. My manual does nor show this carb.

I have a Mikuni to fit but wanted to do a few miles on this one before i swapped them over

[robbiemac]

Hi, if it is a S&S, take a look at this link
I'm sure it's been put up here before.
S&S Shorty Carburetor Adjustments

There is some good info on the bikernet site, if it works, thank them

[grbrown]

Any ideas what breed it is? Or can you post a photo to see if anyone recognises it?

Most of these sorts of thing are underneath, but you probably knew that already! Often hidden under a small plug, to stop us tinkering!

Can you give us any more clues?

[Hawkeye]

The carb is a Harley model, the idle mixture screw is at the very top and vertical, next to impossible to adjust.

As it was dowm i removed it completly and started to fir the Mikuni (not without it's own probs) see other post

[Scotty]

Post a pic of the carb!

[Kiwi]

if its an original carb the best move is to remove it and replace it with an S&S or a mikuni or if you don't want to spend that much money a later CV type (which being a 92 it should have anyway)

All three carbs are a vast improvement over the earlier pre CV keihins

[grbrown]

Thinking about it, if you are using genuine slashcuts, you may never get the thing to run right!

If there is a nozzle tucked away inside each of them, giving a square-cut outlet, you will be OK.

S&S carbs tend to have a bad image over here because they have commonly been used with unsuitable exhausts like slashcuts or drag pipes, so run rough....

[kiwidave]

Don't bin it though. If it is, as it appears to be, a Keihin butterfly carb (OEM from the 1970s to about 1988), they were ok by the mid 1980s. With only subtle mods, mine has rarely missed a beat in 86,000 miles. I *NEVER* have understood the rush to spend £300 to replace a bit of kit that works well, properly adjusted.

[Kiwi]

Originally Posted by kiwidave

Don't bin it though. If it is, as it appears to be, a Keihin butterfly carb (OEM from the 1970s to about 1988), they were ok by the mid 1980s. With only subtle mods, mine has rarely missed a beat in 86,000 miles. I *NEVER* have understood the rush to spend £300 to replace a bit of kit that works well, properly adjusted.

look on the bright side the original carb off my glide found a new home in your stash of parts, it wasn't a bad carb but the S&S that replaced it was a lot better

[Hawkeye]

I now have the Mikuni fitted thanks guys. The starting and running of this carb has transformed the bike.

The carb that was fitted to the bike was a Harley badged S&S, it was very tired and had had it's best days. Although i say my bike is a 1992, thats when it was registered. In reallity it is a collection of parts making up a Harley, STD cases, S&S heads and valve gear, a gearbox with a tapered output shaft not a splined.

But it is great !!!, pulls like a train and feel like an armchair