E on a shovel likes .031 intermediate and 68 to 72 main depending on a few things. Get her warmed up, turn the mixture screw both ways till it stumbles then center between 2 points. Kill it then gently seat the screw counting the turns. should 1-1/2 or so out, less the jet is too small. It will want to idle high and run one like the deasiling issue when lean. Shovels like it a hair on the fat side.

Some guys swear by a .0295 jet but I've alway had tuning issues when I tried them on various machines.

 

Ok, this is helpful - I will give this a try.. THANKS!

 

[QUOTE=98hotrodfatboy;21348939]Set idle to 900 rpm.. what ignition are you running.. Also what intermediate jet are you running..

Compu-Fire ignition. Not too sure I understand the advance curve and VOES settings, but I'm simply following the directions. This bike is still a 74 cubic inch.

I will check to see what intermediate I'm running, but it looks like it needs to up a size, exactly as you're describing. My mixture screw was 2-1/2 turns out. (But I want to make sure my timing is in range first.)

Thanks!

 

2.5 turns out does indicate a small intermediate jet. If I was to guess on a stock 74"er, I'd say it has an .028" intermediate.. That's just a guess though based on my experience with an S&S.. And if so a .0295" should suffice..
Your Compufire ignition uses a static led to set base timing, right? If you followed their directions you should be good.. I used the red Compufire ignition with centrifugal advance on my 76 and must say it worked flawlessly.. I recently gave it to a friend for his shovel because I sold mine..

 

I just pulled out the intermediate... it's a .0295. I guess I'll go up to the .031 which seems odd considering it likes the 66 main much better than the 70.

 

Have you checked the passages for the intermediate circuit to make sure nothing is plugged.. Including the jet? And as TwiZted said maybe it just likes a.031"..

 

I will check for blockages just to be sure, but it's a brand new carb, and a brand new rebuild with 400 miles! Hopefully TwiZted is right....

Thanks again!

 

I've always been told by some of the best.. You need to give the motor what it wants.. Not what you think it should be ..

 

Good one! I'll definitely remember that.

I went up on step to the larger .031 intermediate, and now the bile likes to be at 1.5 turns out, so at least I know I'm using the right sized intermediate. The bike still breaks up at higher RPM's but it seems to have improved. I will forget everything I think I know about intermediate and main jetting, and throw logic out the window. I'll try going up from my 66 main to a 70 and see if that clears up the issue.

 

I put together a 76' that had not run in 4 years and had a Super E. Had a mid-range break up so I started playing with an increase in intermediate and main jets. All along it had a bad spark plug wire end that seemed to work but wasn't snug on the plug. I had ordered new ones but received the wrong set and waited a week to reorder. Wouldn't you know after I got the new wires on I ended up back with the original jetting.
I swore it was a mixture break up.