Post by 90GTVert on Oct 31, 2011 16:26:06 GMT -5
Leo Vince ZX 50cc
vs
Leo Vince ZX 100cc
(For Minarelli Horizontal Two-Strokes)
I've owned a Leo Vince ZX for a 100cc Yamaha Aerox with a horizontal minarelli engine for two or three years now. I use it on my 90-100cc Vento Tritons. The 100cc version of this pipe is hard to find in the US, so I bought it from overseas from SIP Scootershop and paid around $300 for it. I had used a 50-70cc MRP exhaust on other 90-100cc engines and had overheating issues, so I felt it was worth the extra money to get a tuned pipe intended for the larger displacement minarelli engines. I've been pretty pleased with it.
See a test of a 50-70cc MRP exhaust on a 90-100cc HERE. You can find pics, sounds, and other information about the 100cc ZX exhaust in the same link as well.
I found a deal on a used Leo Vince ZX for a 50cc Yamaha Zuma on eBay recently, and I purchased it. The ZX has been discontinued for the Leo Vince ZX-R. The ZX-R is the same as the ZX, but it features a longer silencer for improved sound dampening. A new ZX-R will cost you around $180 - $200. I received my new (to me) 50cc ZX pipe today, and wanted to compare the 50 and 100 versions side by side.
At first glance, they look like nearly the same pipe. I should note, my 100cc ZX has been modified and painted as detailed HERE. Cliff notes : I removed the restrictor from the header as well as the sound deadening inside and opened up the header to create a larger inlet. The 50cc pipe has no restriction. It was probably removed by the previous owner.
The most obvious differences in the two are the layout of the brackets and the header routing. I believe these are simply model specific to better suit the Zuma or the Aerox.
The Zuma 50 exhaust looks like it's been beaten, showing large dings. It is my understanding that these are present to make room for the Zuma's center stand.
When the weather gets a little bit colder, I'm going to try the freezing trick to see if the dings will come out since I don't need this clearance. For those that don't know, sometimes you can remove a ding with water and freezing temps. Fill the pipe with water and freeze it. When the water freezes, it expands and tries to pop the dings out. Do not plug the ends of the pipe. Here is an example of the principle on YouTube.
I compared the stingers, since this section is know to cause overheating when improperly designed for the engine it is installed on. They are the same.
I thought perhaps the length of the pipe is different and/or the volume. I started by using a length of wire to measure the pipe from the end of the stinger where it enters the silencer to the header.
Even doing this very quickly, without worrying about the absolute best routing for accuracy on each pipe, I came up with roughly 1/4" of difference between the two. I can just about guarantee this is only a difference in my routing methods on the two header designs. I took quick measurements of some sections and they came up the same.
I also checked diameter of the sections of the pipe. It appears that these are the same pipe (plus some dings) past the header section. The header of the 100cc pipe measures just a couple of mm larger than the 50cc version.
The 100cc ZX had a 21mm inlet before I modified it, and the 50cc version is the same.
If you take away the differences for adapting these pipes to different scooter models, you're left with two very similar exhausts. It appears that all you get with the 100cc version is a just slightly larger header diameter. It would create a small amount more volume, but I'm not sure if it would have much effect given the 21mm inlet on both pipes. I can't even be 100% sure that a 50cc Aerox pipe wouldn't have the same, larger, header.
vs
Leo Vince ZX 100cc
(For Minarelli Horizontal Two-Strokes)
I've owned a Leo Vince ZX for a 100cc Yamaha Aerox with a horizontal minarelli engine for two or three years now. I use it on my 90-100cc Vento Tritons. The 100cc version of this pipe is hard to find in the US, so I bought it from overseas from SIP Scootershop and paid around $300 for it. I had used a 50-70cc MRP exhaust on other 90-100cc engines and had overheating issues, so I felt it was worth the extra money to get a tuned pipe intended for the larger displacement minarelli engines. I've been pretty pleased with it.
See a test of a 50-70cc MRP exhaust on a 90-100cc HERE. You can find pics, sounds, and other information about the 100cc ZX exhaust in the same link as well.
I found a deal on a used Leo Vince ZX for a 50cc Yamaha Zuma on eBay recently, and I purchased it. The ZX has been discontinued for the Leo Vince ZX-R. The ZX-R is the same as the ZX, but it features a longer silencer for improved sound dampening. A new ZX-R will cost you around $180 - $200. I received my new (to me) 50cc ZX pipe today, and wanted to compare the 50 and 100 versions side by side.
At first glance, they look like nearly the same pipe. I should note, my 100cc ZX has been modified and painted as detailed HERE. Cliff notes : I removed the restrictor from the header as well as the sound deadening inside and opened up the header to create a larger inlet. The 50cc pipe has no restriction. It was probably removed by the previous owner.
The most obvious differences in the two are the layout of the brackets and the header routing. I believe these are simply model specific to better suit the Zuma or the Aerox.
The Zuma 50 exhaust looks like it's been beaten, showing large dings. It is my understanding that these are present to make room for the Zuma's center stand.
When the weather gets a little bit colder, I'm going to try the freezing trick to see if the dings will come out since I don't need this clearance. For those that don't know, sometimes you can remove a ding with water and freezing temps. Fill the pipe with water and freeze it. When the water freezes, it expands and tries to pop the dings out. Do not plug the ends of the pipe. Here is an example of the principle on YouTube.
I compared the stingers, since this section is know to cause overheating when improperly designed for the engine it is installed on. They are the same.
I thought perhaps the length of the pipe is different and/or the volume. I started by using a length of wire to measure the pipe from the end of the stinger where it enters the silencer to the header.
Even doing this very quickly, without worrying about the absolute best routing for accuracy on each pipe, I came up with roughly 1/4" of difference between the two. I can just about guarantee this is only a difference in my routing methods on the two header designs. I took quick measurements of some sections and they came up the same.
I also checked diameter of the sections of the pipe. It appears that these are the same pipe (plus some dings) past the header section. The header of the 100cc pipe measures just a couple of mm larger than the 50cc version.
The 100cc ZX had a 21mm inlet before I modified it, and the 50cc version is the same.
If you take away the differences for adapting these pipes to different scooter models, you're left with two very similar exhausts. It appears that all you get with the 100cc version is a just slightly larger header diameter. It would create a small amount more volume, but I'm not sure if it would have much effect given the 21mm inlet on both pipes. I can't even be 100% sure that a 50cc Aerox pipe wouldn't have the same, larger, header.
