[Lostabolt]

I'll start by listing the mods that were on the the bike before winter. It had a k&n filter, hard krome piped w/o baffles, dynojet kit.

Over the winter I kept the pipes, installed TJ Brutal Customs Velocity stacks, 4 degree timing mod, clutch Springs, and bought the Tj Brutal Customs jet kit.

I have tried many different combos with the jets, but I keep getting different degrees of the same issue.

The issue is, I sputter and have absolutely no power. It's as if I'm hitting the Rev limiter as soon as I leave the driveway. It idles a little rough as well. I have 145 pilot, 45 main, and dynojet needle on the 4th groove. This combination worked for about a week, and ran great. Then the sputtering started. I should add that I get some black smoke briefly while revving at idle, but no popping or any bucking/sputtering at idle. It only happens under load.

I haven't replaced the plugs, not sure if the P/O did or not. I have 11k on it. The plugs were a little wet and had a little bit of brownish gunk on them.

I've read these are symptoms of running rich. I moved the needle up a clip and it was even worse. I had to Rev almost to realize to keep it from drying.

Any ideas? Do I need to simply replace the plugs? Did I bump the floats out of adjustment? Electrical issue? It's definitely getting enough air, so I know it's a gas or spark issue.

Thanks for your time.

 

[swifty2014]

It sounds too rich. Cut the richness back and replace the plugs and see what that does.
If you went from a 120's size main to a 145, that seems a bit much. Especially with raising the needle 4 grooves also.
It may have run good because the weather was warmer for while ??? Then the plugs started to foul out with all that fuel and cooler temps. Just a guess. You have to back track sometimes.

 

[GB6049]

Worst is to call TTj. Never worked with him but others who have had nothing but good things to say his helping them get dialed in.

 

[Lostabolt]

I was wrong, I had the 142 mains in. Which are the smallest in the kit.

This guy has a similar build, our bikes look almost the same too!
http://www.chopcult.com/forum/showthread.php?t=36242&page=3

He used some pretty aggressive jetting also.

As a side note, my floats were way off. They were closer to 9-10mm instead of 7, not sure how that happened.

 

[Lostabolt]

Does anyone know how the needle in the dynojet kit compares to the stock needle? In other words, what groove on the needle = no shims on stock needle? I understand that the profiles are much different, and the dynojet needle is much less restrictive.

 

[Lostabolt]

Sorry I haven't updated, there was a death in the family.

I moved the clip to the 1st notch. With that and the float adjustment, the 145 and 45 jets seem to be doing well. I haven't taken it on a ride yet. I will let you all know how it goes.

 

[swifty2014]

Sorry to hear of the family issue.

I hope your carbs are all set to run for a long time.

 

[GB6049]

Sent you a PM to see where you ended up with your jets.