Uneven Length Two Into One?

[Flynn]

I want to replicate an exhaust system I saw online but I'd like to get an idea of how much it will effect performance first. The system is a 2 into 1, but one exhaust pipe will be longer than the other before they join together. That and I'll be getting rid of the power chamber.

The system has both pipes exiting the motor and curving down to foot-level as normal, but one side then crosses underneath the bike to meet the other (see picture for reference).
I have two questions:
1. Will having two different pipe lengths before the collector cause any significant issues?
2. Am I going to regret adding that variance while also removing the power chamber? Will this be too many changes to performance at once?

Additional Info:
Motorcycle: 1981 CB400T HAWK, purchased with old cruddy exhaust system.
Post on power chamber function for reference: https://www.vintagehondatwins.com/forums/threads/power-chambers-explained.155/
Post where LongDistanceRider discusses 2 into 1 exhaust and pipe length: https://www.vintagehondatwins.com/forums/threads/two-into-one-exhaust-for-cb-400-n.3336/
Video where the exhaust is made:

Thanks!

 

[LongDistanceRider]

Interesting design idea. Longer pipes improve the lower rpm power, shorter improves the upper. This is a combination where the left cylinder will be stronger at low rpm and right side higher a high rpm. I don't see any obvious issues.
One thing on the video that's wrong is his merge collector is sized wrong. 1.625" inlet pipes and 1.5" outlet which should be 1.75", it's a restriction as it is.

 

[stl360+450]

Longer pipes improve the lower rpm power, shorter improves the upper. This is a combination where the left cylinder will be stronger at low rpm and right side higher a high rpm. I don't see any obvious issues.

Wouldn't it hurt the overall power production (in theory) for the cylinders to distribute the load unevenly in those operating extremes?

Why not push the collector to the middle to gain symmetry and then run the outlet whatever way to the outside?

 

[Flynn]

Interesting design idea. Longer pipes improve the lower rpm power, shorter improves the upper. This is a combination where the left cylinder will be stronger at low rpm and right side higher a high rpm. I don't see any obvious issues.
One thing on the video that's wrong is his merge collector is sized wrong. 1.625" inlet pipes and 1.5" outlet which should be 1.75", it's a restriction as it is.

Yea the bike he creates has got to be my favorite online inspiration.
Good to know, thanks!