Meier Link

Needing help. So here is what's going on the bike fires great with or with out the enricher. Gets to temp great. Idles great around 11k rpm. First through third the bike runs great. 4 through 6th though is where the issue kicks in between 3.8 to 4.5 k is where the issue resides. Sadly this is cruising speed rpms for my SH. It bogs down and will not accelerate and will die in most cases. Messed up at 85ish on a busy highway.

Back story I did an oil pan mod which added a skid plate to the bike to help with the lowering issue. I removed the 2 to 1 exhaust and that's when the problem started. I get a small popping during deceleration and can not feel an exhaust leak.

The problem is getting worse with the stalls. Here is a list of what I have done so far and everything has helped the bike run better but hasn't fixed the over all problem.

Carb clean (again)
Carb sync (again)
Pet **** \ carb examinination with no signs of wear to the seals.
Main tank and over flow off of the tank examined and they are clear.
Replaced both pet **** lines and the pet **** vacuum lines
Replaced the rectifier with one that works. Solved blinking low fuel light. Not mosfet yet but the rectifier now seems to be functioning properly (will mod soon).
Air filter is clean
Oil levels solid
0 leaks from fuel, cooling, vacuum or air intake
Checked the enricher at the carbs (plastic peices ) no cracks and the enricher is functioning properly. Will mod later.
Ran system cleaners and switched to 89 octane with no methonal.
No water in the tank.

I will be pulling the exhaust again tonight and resealing it up again. Will report on that again tomorrow.
No flickering or dimming of the lights.
Spark plugs are clean.

Any ideas would be helpful. The bike ran great before getting into the oil pan and doing that mod. Only thing I changed there was the addition of a skid plate and went with a slightly larger oil filter. Did that addition off of one of the threads I found here: which was a highly recommended filter. Had to mod the lower fwd fairing to accept the longer filter but that was a quick trim of a fairing and addition of a spacer which would do nothing to the performance of the bike.

Going to be pissed if it is an exhaust leak in combination with the 2 to 1 set up.

Jack Flash

You removed the 2-1 exhaust to go back to standard 2-1-2 ? What's your jetting right now ? What is this larger air filter you speak of ? Have you tried a choke test while riding ?

Without this info, it's very difficult to begin getting a feel for the bike.

As for your modded oil pan, I really don't see any correlation with your jetting problem.

Meier Link

Yes I have done a choke test conditions still exsist.
Stayed with the 2 to 1 exhaust.
Jetting is stock
Air filter is oem
Sorry the filter that is larger is the oil filter not the air filter.

Jack Flash

Is your petcock connected to the back nipple, or, bottom nipple ? If it's at the bottom, it's wrong. If this was ok to begin with, lets move on.

Did the bike run fine with the 2-1 exhaust before removing it, or is this a new mod ? If this was already on the bike, perhaps you should read into this thread on 2-1 exhausts if you have not already done so. https://www.superhawkforum.com/forum...t-rejet-32256/

I don't know much about this mod, but do know jetting is different, and, you do loose power lower and mid, but gain on top IIRC.

Meier Link

The mod was already done to the bike and it ran fine prior to removal and reinstalled them the same way they came off.

Vacuum line on the pet **** is connected to the rear not the down nipple. I've made that mistake before haha.

Jack Flash

I'm beginning to think this may be electrical problem. Perhaps R/R related. Have you modded it, or, had it been modded before by PO ? Bad rectifier can kill a battery. Perhaps checking the battery voltage while running the bike will help confirm or rule this out.

It's also late, and I'm running out of ideas. Hope someone else can chime in while we sleep on this one.

Also very difficult when the bike is not in front of you.

Meier Link

Had a member on here send me a good r\r. The set up is still stock for now but the new unit tests good and still having the issue. As I stated in the OP I will be switching to a MOSFET unit soon but with a good unit this has my mind blown haha.

Trying to stay positive. I did change out connectors before changing the r/r. So I SD peace of mind the connection there is good.

The old unit was bad. Could it possibly be a bad cell in the battery caused by the old r/r failing? The battery is less then 4 months old.

Edit: I thought I posted this to technical discussion. Can a mod please move it to the appropriate forum?

E.Marquez

I think we are fine here in general... As it really is not a Tech discussion on ONE thing.... but a general discussion on a mired of things that may be worng as you work though diag.
Number one rule of Diagnosis, assum nothing, not a new out of the box part recently installed or a previously tested "good" part.
Rule number 2 skip nothing in the diag process...if it could be wrong, it gets tested before moving on.

As soon as you dismiss that new part, that tested last time part or connection...after chasing the issue for hours you will circle back around or another person will check and find the issue was right there all along in a part you skipped or assumed was good.

While you had the 2-1 exhaust off, did a rat or bird build a nest in the pipe?
Is that battery good after load testing?
Are the R/R connections still good electrically?
Make a list to check, take notes as you go.
Any new part gets tested after install.

Hangfly