Exhaust? – GV125C
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Can you post a picture of your current bike showing the exhaust ?
Some GVs have factory twin pipes and some are a single cannon (2 variations exist also) = Making 3 designs total.
In honesty, the company that makes bolt on exhaust kits for the GV that work well is the LeoVince Silvertail, the bike looses speed without baffle, so best to keep it in.
Due to the nature of the GV having its pipes so short and a massive long cannon or twin long cannons, adding slash cuts is not something i would do, its very loud (annoying loud lol) and the bike looses a lot of power (as it’s too free flowing). However some people don’t really care as they just do it for the “looks” really when doing bobber chop frame cut conversions, so they want things at the back shrunk down more.
The carby GV650 will get away with slash cuts (stubbies) , if the bike gets tuned right. It’s hard to tune the 125 with very short systems. There is a reason leovince kept the pipes long as they can for the GV250 and GV125 models.
Sorry for delayed reply, i hope this gives you some insight too.
You could probably get away with “being creative” to cut inside the stock exhaust to make its hole bigger for sound , and still have some kind of backpressure retain, (The single long long cannon system) , it probably has a lot of stuffing inside to dampen the noise too.
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I assume those are still stock pipes.
If you get a string. Wrap around the part of the headers that connect to the cannons. Ie. String is 38mm end to end , so the headers would be 38mm, you would have to get some kind of reducer from 38 to 30mm, then find 2x long long cans that are 30mm – If the cans rear the back tyre like your old ones, then it should be okay with a baffle hole that is about the size of a 10p coil. This is an example as i have forgotten off my head exact diameter of the old style twin pipes but i do know about the single cannon pipes as thats most common on later GV125s.I believe Amazon might have such cans, ebay is a wild mess of chinese things nowdays. Failing that you could have someone fabricate a Y shape pipe that takes 2 pipes in to one single pipe , then you could have maybe 32mm to 40mm cans that should be about as long to reach the end of the swingarm. You won’t loose too much power and still get a good sound.
Remember though any changes to the air (exhaust or intake) = upjet the carb so the bike doesn’t lean out.
There is a tutorial on the forum on how to safely remove the airbox without damaging the super rare intake manifolds.
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I have personally not changed the sounds of my donor bikes, i must be an old fart, i actually like the sound of the OEM cans that are twins , and drill the baffle hole so that its a little wider, gives me a more softer deep note , its quite nice. I would avoid the single cannons , as they are too heavy and too quiet. If i was to ever change the pipes of my donors, i would get it from silvertail directly.
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