Welcome.
Before you spend any money having the carbs rebuilt, you need to understand some things.
1. Your bike is running individual pods for the induction. This is a very common alteration, but in every instance also drastically effects (negative) the performance of the carbs. It takes significant effort to re-tune the motor (carbs) for pods. So it’s liekly that was not done, or at least not done well.
2. The exhaust on your bike, while aesthetically quite attractive, also is hampering the performance of the motor due to its very short length. There’s far less back pressure now, so you’ll see a major drop off in throttle response.
So, add 1+2 together and you get motor that is now setup to run about as poorly as possible. And if you have little to no experience with motors of this era, your unfamiliarity will also be an aspect of frustration. These motors are not like modern, fuel injected, dual cam animals. They are gravity fed mechanical carbs with no computer to control their air/fuel mixture. There’s 4 of these persnickety beasts too. The throttle needs to be rolled, not whacked, and your motor will behave much better above 6,000 RPMs than it ever will near idle. Unlike a V Twin, big cam hog, these will sound like sewing machines and want to spin like a gerbil on cocaine. Get the point?
It’s possible to get that motor to “behave”, but in all honesty, you either need to dig in personally and learn to do it, or you’ll spend several hundred dollars at a really competent shop to have them use a Dyno to properly tune it.
There’s heaps of folks on this forum who can and will help you go step-by-step to learn and do these things if you have the willingness and interest to make it rideable and reliable. Cool bike, hope you enjoy riding it!
