Trouble Getting Going

[koko64]

Ok, use the manual petcock and oem fuel pump and jet that sucker!

Try a baseline of one of the jetting combinations mentioned and work from there.
Understand that there is jetting for these carbs that is ok, jetting that great and jetting that is awesome.

You have shown a lot of patience and jetting carbs requires it. You might get it spot on or close enough to ride the bike for a few weeks before you think there is an area in the carburation you want to change.

What jetting combo you going to try?

[ChrisK]

Ok, use the manual petcock and oem fuel pump and jet that sucker!

Try a baseline of one of the jetting combinations mentioned and work from there.
Understand that there is jetting for these carbs that is ok, jetting that great and jetting that is awesome.

You have shown a lot of patience and jetting carbs requires it. You might get it spot on or close enough to ride the bike for a few weeks before you think there is an area in the carburation you want to change.

What jetting combo you going to try?

I know it takes patience, it's just so hard to have it when the weather is FINALLY warming up around here. I went through at least a dozen jetting changes when I installed Dynojets in my Mikunis, so I'm used to this part I guess.

I'm going to order 2x:

Mains, 165, 160, 162
Slows, 55, 52, 50

When I get them in the first setup I will try will be 165 mains, 55 slows, and 5th needle position.

Any other suggestions welcome!

[ChrisK]

Also, whoever said jets are cheap just wasn't correct. Yes, as individuals they are. But when you have to buy two of each in 6 sizes...

$83.40. Glad I'm not tuning an old four cylinder...

[ChrisK]

Is there much of a difference between Genuine OEM Keihin jets and "OEM equivalent" jets?

They're half the price.

[koko64]

Expensive to you, but cheap down here

CCW has cheaper equivalent jets iirc.
I know the slow jets are the same as in Harley Keihin 38mm butterfly carbs on 80s models. I found them cheap at my Harley dealer.
If CCW have run out you could try Powerbarn , Brad mentioned them a time back. At least you can keep them if you need them when you fit the V heads or other mods.

It would be tough after a hard winter.

[ChrisK]

I ended up going with OEM equivalents from a company called Jets-R-Us in Missouri. $3.19 for the mains and $4.67 for the slows. Brought the total to $47~. That's much easier to swallow.

[koko64]

Just checked them out. Another good site for jets. You guys got shops everywhere!

[koko64]

I know it takes patience,  I went through at least a dozen jetting changes when I installed Dynojets in my Mikunis, so I'm used to this part I guess.

So you are well versed in the airbox/battery box removal drill .

I separated the airbox from the battery box. I run a small Li battery so there was no strain on the battery box bolts. I cut at the join between the two and removed material, but leave enough for the battery straps. On my own bike, I trimmed down the battery box and used the bung holes to fit straps. I also cut off that annoying little alloy tab on the Ignition/steering lock that snags the front of the airbox on install . With a dremel, I made little arches above the tops of the FCRs top cap so I just remove the battery box to access the needles with the airbox in place. Removing just the battery box is so much quicker. I change main and slow jets via the drain cap and float bowl. Airbox stays put.
Speeddog fit stabilizing brackets between the airbox and battery box. Imagine one end of the bracket bolted on and one end with Dzu fasteners; trick!

I can email you pics if you PM me.

[ChrisK]

Wow, that sounds great, can't believe I didn't think of that.

I'll send ya my address.

[koko64]

Sorry about the pics. I didn't have any during the mods. The lighting wasn't real good, but I think you get the idea.

[ChrisK]

You were right, Koko, that is much easier like that.



Needle clips at the 5th position now, just waiting for the other jets to arrive.

[ChrisK]

After eliminating the vacuum operated petcock, what do you guys do with the old line? Is there a cap you can get to replace the hose or something like that?

[ducpainter]

After eliminating the vacuum operated petcock, what do you guys do with the old line? Is there a cap you can get to replace the hose or something like that?

Auto parts store should have a vacuum cap. 5mm would be 3/16"

[koko64]

+1.
I think I also may have plugged one with an alloy bolt and clamp and used it for synching the carbs. Then I did a set up on the other outer side.
The caps are neater.

[ChrisK]

Cool, thanks you two.