R3 classic running like a twin. Backfiring and stumbling

[atomsplitter]

What number depicts TB Boot in this diagram?

#12, in the catalog they are listed as "adapters." They are a rubber piece between the TBs and the engine and absorb the engine vibes so the TBs don't get shaken to pieces.

 

[TURBO200R4]

I think that i am thinking in another direction.
The first thing I would do is spray starting fluid into the dead cyl while if it reacts then you have a fuel problem and if it doesn't then you have an ignition problem
On ignition problem you can use a 12 volt test light by hooking clamp to positive terminal and probe the outside terminal (the one the ecu grounds) some test lights will kill the coil and some will blink when the ecu fires.
Keep us posted.

 

[busy_rydin]

You guys are awesome. And now I feel kinda dumb. But now I know more about my little beast so it was all worth it. The intake manifold clamp had come loose and was letting air into the first cylinder. After removing, re-seating, and tightening the clamp….. SHE Purrrrs again!!!!! Easy fix and now I have a compression tester in my toolbox and fresh spark plugs. She should be good to go for the foreseeable future.

 

[atomsplitter]

You guys are awesome. And now I feel kinda dumb. But now I know more about my little beast so it was all worth it. The intake manifold clamp had come loose and was letting air into the first cylinder. After removing, re-seating, and tightening the clamp….. SHE Purrrrs again!!!!! Easy fix and now I have a compression tester in my toolbox and fresh spark plugs. She should be good to go for the foreseeable future.

That is great news indeed. Glad we could help sort you out. Post up a short vid of the bike running as it should.

 

[R-III-R Turbo]

Good man you found the leak so. Classic vacuum leak strikes again.

What are your throttle balance numbers now?

 

[busy_rydin]

Here’s a link of how I blocked the intake to try and stall the engine. Leak on cylinder 1

Here is the video and numbers after re-seating the intake manifold. Running much better