RZ350 parts

[BigMatt]

Is it worth it to put the RZ350 power valve system on a banshee motor? aslo what about the tranny, I know the RZ350 has a different tranny. here is a video I found on youtube with it done

[bansheesandrider]

It is a lot of work- you either have to put the complete RZ electrical system on the Banshee to run the powervalve system, or you have to find an aftermarket controller to do it. I think there is a company called Zeeltronics that makes one. One other thing to consider is that the RZ cylinder water jacket is smaller than the Banshee's, because of the powervalve. This could lead to overheating and/or siezures in the exhaust port area. The Banshee has a close ratio tranny and the RZ has a wide ratio tranny- this means the RPMs will drop more when you shift gears with the wide ratio. This means that off road, it will be harder to keep the bike in the powerband, but for desert racing it could allow for more favorable top speed.

[BigMatt]

It is a lot of work- you either have to put the complete RZ electrical system on the Banshee to run the powervalve system, or you have to find an aftermarket controller to do it. I think there is a company called Zeeltronics that makes one. One other thing to consider is that the RZ cylinder water jacket is smaller than the Banshee's, because of the powervalve. This could lead to overheating and/or siezures in the exhaust port area. The Banshee has a close ratio tranny and the RZ has a wide ratio tranny- this means the RPMs will drop more when you shift gears with the wide ratio. This means that off road, it will be harder to keep the bike in the powerband, but for desert racing it could allow for more favorable top speed.

your pretty knowledgeable about this have you done this or own a rz350? I guess the tranny is out of the question, I thought it mite be bad for trail riding because of the street gearing, but is there an advantage to the power valve system on a banshee or is it a wast of time and money? could you run the rz350 jugs to match the head? thanks man

[BigMatt]

fixed it

 

your pretty knowledgeable about this have you done this or own a rz350? I guess the tranny is out of the question, I thought it mite be bad for trail riding because of the street gearing, but is there an advantage to the power valve system on a banshee or is it a wast of time and money? could you run the rz350 jugs to match the head? thanks man

[bansheesandrider]

fixed it

 

your pretty knowledgeable about this have you done this or own a rz350? I guess the tranny is out of the question, I thought it mite be bad for trail riding because of the street gearing, but is there an advantage to the power valve system on a banshee or is it a wast of time and money? could you run the rz350 jugs to match the head? thanks man

I just did a lot of research for a ground up build I am doing. I wanted to use the original RZ shift forks that had the roller on the guide pin for the shift drum, but it seems that Yamaha discontinued them and used the Banshee style in the later years overseas. The advantage of the powervalve is that it improves low end power without sacrificing top end power. As you know, to gain power in one place, you usually have to sacrifice it somewhere else. The powervalve lessens that sacrifice by varying the size of the exhaust port, small ports make low end power and large ports make top end power. The powervalve is in the exhaust port of the jugs so refer back to my first reply. The stock RZ electrical system is DC, has a rectifier,a powervalve controller, servo motors and cables to run the powervalves, etc. If money is no object and you want to have something unique then go for it, but the money would be better spent on a properly ported and built 4mil instead.