&*%##@! carbs

[BA80]

I thought about that but I have a dozen airboxes laying around and if this works there's a pretty good chance it'll be permanent.

[Bonz]

Look forward to hearing the results.

[BA80]

Got the set of early carbs installed and synced. The bike runs 200% better.

No bogging, no embarrassing sputtering takeoffs.

I've noticed another issue though, after it's warmed up at stops the engine will slowly lose RPM and eventually die.

I'll ride it a bit and readjust everything.

[skids]

Got the set of early carbs installed and synced. The bike runs 200% better.

No bogging, no embarrassing sputtering takeoffs.

I've noticed another issue though, after it's warmed up at stops the engine will slowly lose RPM and eventually die.

I'll ride it a bit and readjust everything.

Get a box fan and color the plugs at idle.

[BA80]

It seems to have something to do with the clutch. It must be dragging a little idling in gear. If I kick it up into neutral it doesn't die.

I know it's adjusted right, I just checked it the other day.

I need to put some heavier springs in it anyway, I'll look it over. I have a dozen clutch packs in the pile-o-parts.

I will read the plugs again after I've put a few miles on it. It ran great the 16 miles home from work today.

[skids]

Maybe you should just use the throttle a little at stop signs until the clutch is worn-in just a bit?

[BA80]

It's already slipping a little. Why not just fix it? It's not like I don't have the parts or anything and the clutch is a simple job.

[Rasputin]

So you have pretty much narrowed it down to the carbs with a bit of a possible clutch issue as well. The later carbs can be made to run every bit as well as the older ones. They are more finicky for sure to deal with and if I had my choice all of them would be the older ones.
Question for inquiring minds is still... what was the issue? So I personally hope you try to take this to the next level after riding and getting it right with this set of carb's. It is all a learning moment, be it for the newbie or more experienced people.
I do not check my plugs while idling with a fan. I ride it for a while till it is at full heat then pull into my driveway and let it idle for a minute. That is a way more true value of what your idle plugs look like. I never have set my carbs without a high chop and an idle check on the plugs. I have been saying for years that I can get 48 MPG and I stand by it.

[BA80]

Honestly, as I said I normally don't have an issue with carbs. I've built a lot of them without a problem. Early and late.

This late set I put together out of parts on hand. I could not, and still don't see what the issue is, I wish I knew. I've had them off and apart multiple times.

I had similar issues with the original set on Ol' Okie, my original SG. Not quite as bad but eventually because of tearing into them repeatedly I ended up breaking a float post and purchasing a set off ebay that turned out to be 79 carbs.

I rebuilt them and they ran good other than learning from experience about aftermarket pilot jets.

I REALLY like the older carbs........Ralph Nader can go to ........

[motoman]

I normally don't have a problem with carbs but this set of late (80) carbs has got me pulling my hair.

I've been screwing with them for some time now.

They have all stock Mikuni jets, I was having a flooding issue when parked but replaced the float needles and got that taken care of.

It seems no matter what I do it will load up at stops after the engine is warmed up. Running down the road it's fine unless I let the RPMs get below around 3K and then it stumbles all over itself until it clears out. And I need to rev the engine pretty high to get rolling or it will die.

I've lowered float levels several times, moved them up and down and all that does is screw with cruising and WOT.

Any ideas?

I'm fixin' to put a set of 79 carbs on there and be done with it.

Well.....I'm sure you can guess my idea....ready?.....now?............................... .........................................
............idle mixture screws out to far(highest in. vacuum), creating rich mixture at lower rpms(lean drop method my friend)........................................... ......................
...........okay...bite me back....lol.

[BA80]

Got the set of early carbs installed and synced. The bike runs 200% better.

No bogging, no embarrassing sputtering takeoffs.

I've noticed another issue though, after it's warmed up at stops the engine will slowly lose RPM and eventually die.

I'll ride it a bit and readjust everything.

Well.....I'm sure you can guess my idea....ready?.....now?............................... .........................................
............idle mixture screws out to far(highest in. vacuum), creating rich mixture at lower rpms(lean drop method my friend)........................................... ......................
...........okay...bite me back....lol.

Guess you missed that one Brant.

[motoman]

Guess you missed that one Brant.

Nope.....got it, which also kinda confirms when warmed up, it is then too rich.....'.runs, and idles till warmed up' I presumed is kinda what it's doing.

[BA80]

Nope.....got it, which also kinda confirms when warmed up, it is then too rich.....'.runs, and idles till warmed up' I presumed is kinda what it's doing.

It seems to have something to do with the clutch. It must be dragging a little idling in gear. If I kick it up into neutral it doesn't die.

I know it's adjusted right, I just checked it the other day.

I need to put some heavier springs in it anyway, I'll look it over. I have a dozen clutch packs in the pile-o-parts.

I will read the plugs again after I've put a few miles on it. It ran great the 16 miles home from work today.

I need to take the clutch apart and see what's up. it drags when warmed up.

[motoman]

I need to take the clutch apart and see what's up. it drags when warmed up.

Simplest to do first, is re-adjust that throw-out assembly......while it's hot.
Had similar situation on my Venturer, after doing the 'dermal-fix' some 6-7yrs. back. Made the throw-out adjustment while still cold.......couple days later, same situation with clutch until I re-adjusted throw-out assembly while it all was hot.