I searched long and hard for an answer to this exact issue. Everyone eludes to the issue but no one seems to give any specifics. In my case, this EXACT issue was due to clogged "bypass holes" in the low speed circuit. This is Mikuni's terminology. Two VERY small holes in the throat of the carbs on the up stream side of the butterfly valve (when closed). Standard carb cleaning cleared the low speed hole but not these. Had to reinsert the low speed screw fully and then blow cleaner thought the low speed circuit to clear them. 100% corrected after that. As others mentioned, this is a lean condition. That's why choking improves the response but its still not right.
@@Xenuear Yes, RUclips wont let me use links so you'll have to google it. Search Mikuni Super BN Owner's Manual. The link from EC Carburetors is the PDF. It is on page 7 labeled "BYPASS HOLES"
I crossed with this video and cause me trouble. The guy didn’t see oil not coming down into the carb. One way valve caused this problem or something on oil distribution lines. Also, running the poor jet ski like that is like sending to the grave.
I searched long and hard for an answer to this exact issue. Everyone eludes to the issue but no one seems to give any specifics. In my case, this EXACT issue was due to clogged "bypass holes" in the low speed circuit. This is Mikuni's terminology. Two VERY small holes in the throat of the carbs on the up stream side of the butterfly valve (when closed). Standard carb cleaning cleared the low speed hole but not these. Had to reinsert the low speed screw fully and then blow cleaner thought the low speed circuit to clear them. 100% corrected after that. As others mentioned, this is a lean condition. That's why choking improves the response but its still not right.
got a diagram or any other info?
@@Xenuear Page 7 of this manual. Labeled “Bypass Holes”
www.eccarburetors.com/assets/images/Mikuni-SBN-Tuning-Manual.pdf
@@Xenuear Yes, RUclips wont let me use links so you'll have to google it. Search Mikuni Super BN Owner's Manual. The link from EC Carburetors is the PDF. It is on page 7 labeled "BYPASS HOLES"
@@Xenuear Yes, search "Mikuni Super BN Owner's Manual". Its on pg. 7 labeled "BYPASS HOLES"
@@Xenuear Yes, search "Mikuni Super BN Owner's Manual". Its on pg. 7 labeled "BYPASS HOLES"
I crossed with this video and cause me trouble. The guy didn’t see oil not coming down into the carb. One way valve caused this problem or something on oil distribution lines. Also, running the poor jet ski like that is like sending to the grave.
had simular problm with a xl 700, stock pop off was 55lbs , only way i could get it to run good was setting pop off at 30-35psi
This not bogging, this lean.
That's definitely bugging you can plainly see hes not getting fueled into the bomb site
@@shannonwilliams601 it's a lack of fuel.
Yes it bogging
I’m having the same issue. Did you figure out what the problem was?
It was the high and low screws, in combination with using the choke, I got it to work fine ...but it was never 100% ended up selling it .
Do you remember what you set the screws to?
Rubin did u ever figure it out? Mine is having the same problem
clean your fuel pump on the carburetor
No fuel
No fuel dummy
How do you get fuel to it obviously it’s not getting fuel