Replaced head pipes & muffler now bike won't idle

[TimMac]

Hello

So I wanted to get some advice before I try to fix this myself and most likely make things worse.
I just replaced my head pipes with the exact same system I had, which is the 17" reverse cone mufflers with stock head pipes cut down about 6".
The old head pipes were 38mm and I replaced them with 34mm. I also replaced the rear turn signals and added a ground to the front turn signals, let the bike sit for 2 weeks and today took it out for a spin. After about 5 or 6 kicks it started and was idling fine, about 3km into the ride I gave it a little to pass a parking car and now it wont idle at all, starts but wont idle, I had to keep the rpms up with the throttle to get it back home.

I'm running Mikuni TM34 flat slides with 25 pilot jets (I think)

Any advice where I should check first to figure out the issue?
The battery is at 15v and is less than 6 months old.

I've attached some photos and a link to a video while I keep it at 900 - 100 rpm with the throttle.
https://jumpshare.com/v/n4vY1QVOP0ViKQceAInQ

Thanks!

 

[Jan_P]

I am no carburetor expert and don't know that type
But usually there is an adjustment screw for increasing the idle .rpm
That would be the first thing I would try
Counting the turns on the adjuster so it can be set back if no solution

 

[gggGary]

With a fast change to idle I'd suspect a chunk of junk in an idle circuit. Idle for a bit low as possible spray a bit of water on the exhausts will reveal which side has the problem. but could be junk on a valve seat, carbs out of sync, two cables? or an ignition problem.

 

[wesleyonoel]

As long as you're looking around, check to make sure the rubber carburetor mountings are where they ought to be. A "sneeze" can be enough to loosen the carburetor from the mount resulting in a vacuum leak....................

 

[TimMac]

I am no carburetor expert and don't know that type
But usually there is an adjustment screw for increasing the idle .rpm
That would be the first thing I would try
Counting the turns on the adjuster so it can be set back if no solution

Yep I did attempt that when it happened but not so lucky

 

[TimMac]

With a fast change to idle I'd suspect a chunk of junk in an idle circuit. Idle for a bit low as possible spray a bit of water on the exhausts will reveal which side has the problem. but could be junk on a valve seat, carbs out of sync, two cables? or an ignition problem.

The RHS pipe is yellowish & purple and the left pipe is more yellow, so I'm guessing it's the left hand side.
Theres two cables for the carbs and I haven't set the sync on them for a while. Sounds like I should be checking the ignition, checking the valves, then cleaning and syncing the carbs.

 

[TimMac]

... and I'll be checking the boots too Wes