My stock CG muffler bugged me since I couldn't take the guts out and look at them. I never liked how it hung off the studs, threatening to work them till something got broken, too. Sticking out front like that, it could get smacked and bust the cylinder. Blah.
I saw a medium length black exhaust system and ordered it only to find out it would never fit my big onex 29" beach cruiser bike. I put it on the shelf til I felt like dealing with it.
I pulled off the original mufflah and test fit the PP. I found I had to egg out the mounting holes to swing it away from the front mount, grind away some extra steel off the clamp on the same mount, cut and extend the straight part 2 3/4 to clear the crank, and find a way to support it just before the muffler.
No big deal, except I don't have a welder or acetylene rig..
SBP sells high temp silicon hose, I saw they used it on their expansion pipes.
Hmm
I cut some pieces for seals and made a short pipe that would fit over the ends of the cut poopoo. I had to emory cloth the ends of the cut pipe, and the inside of the extension to get rid of a seam in there. The extension was cut from the original onex handlebar, being the perfect size I lopped off a piece.
The back hanger is a piece of iron strap from an old hanging planter I found, drilled and bolted with the same bolt that attaches the rear of the chainguard.
It's like a letter T at the pipe, and pieces of silicon hose on the crossbar holds it together.
The picture doesn't show the hanger since it was just a mock up of the pipe for fit when it was taken. Those hose pieces near the tensioner are farther back now, holding it up.
The plumbing flange and nut that attach the muffler could be improved upon.
It will have to be checked all the time.
I started it up and the sound is completely different than the stock muffler. It is edgy and crisp, the pip pip pips are sharp and metallic and every misfire or bit of 4 stroking is right in your face. It sounds like a dirtbike with a burnt out silencer.
It's definitely louder than stock, but not to the point of being a nuisance.
At least I hope not. A little glass packing may be just what it needs.
I might stuff it with a small wad if I can pack it in there somehow.
Now here's the odd part, why I wrote this- the engine runs cooler with it, and I found my NGK 7 plug oily and cold looking.
Putting in the 6 fixed that right up and the plug is looking fine again.
I think maybe the longer pipe lets the gasses get out of the cylinder faster, causing the drop in running temps.
The jetting wasn't affected but just a tiny bit, it runs a hair richer now for reasons not well understood by me. I expected the opposite.
As far as power, so far it is a half mile an hour slower on top (richer), feels about the same at lower speeds with a little bit more noise. I'm cool with that, I mostly ride between 19 and 24, about half throttle most the time.
It looks better than the baloney pipe hanging off the engine, and is up out of the way. They got the curve just right on the downpipe, it looks pretty good.
My rubbers aren't helping the looks, I might get an old bud to weld it over at his house but he's 50 miles away, so they'll do for now.
I hope this helps guys looking at these pipes like I was. They're easier to install on a standard size frame, no doubt.
The poopoo is louder and nastier sounding, with sharp pips and blaps.
A hair slower
A hair richer (on my bike)
A bit cooler running.
Hope this was of some use to someone looking at the poopoos.
Thanks!
I saw a medium length black exhaust system and ordered it only to find out it would never fit my big onex 29" beach cruiser bike. I put it on the shelf til I felt like dealing with it.
I pulled off the original mufflah and test fit the PP. I found I had to egg out the mounting holes to swing it away from the front mount, grind away some extra steel off the clamp on the same mount, cut and extend the straight part 2 3/4 to clear the crank, and find a way to support it just before the muffler.
No big deal, except I don't have a welder or acetylene rig..
SBP sells high temp silicon hose, I saw they used it on their expansion pipes.
Hmm
I cut some pieces for seals and made a short pipe that would fit over the ends of the cut poopoo. I had to emory cloth the ends of the cut pipe, and the inside of the extension to get rid of a seam in there. The extension was cut from the original onex handlebar, being the perfect size I lopped off a piece.
The back hanger is a piece of iron strap from an old hanging planter I found, drilled and bolted with the same bolt that attaches the rear of the chainguard.
It's like a letter T at the pipe, and pieces of silicon hose on the crossbar holds it together.
The picture doesn't show the hanger since it was just a mock up of the pipe for fit when it was taken. Those hose pieces near the tensioner are farther back now, holding it up.
The plumbing flange and nut that attach the muffler could be improved upon.
It will have to be checked all the time.
I started it up and the sound is completely different than the stock muffler. It is edgy and crisp, the pip pip pips are sharp and metallic and every misfire or bit of 4 stroking is right in your face. It sounds like a dirtbike with a burnt out silencer.
It's definitely louder than stock, but not to the point of being a nuisance.
At least I hope not. A little glass packing may be just what it needs.
I might stuff it with a small wad if I can pack it in there somehow.
Now here's the odd part, why I wrote this- the engine runs cooler with it, and I found my NGK 7 plug oily and cold looking.
Putting in the 6 fixed that right up and the plug is looking fine again.
I think maybe the longer pipe lets the gasses get out of the cylinder faster, causing the drop in running temps.
The jetting wasn't affected but just a tiny bit, it runs a hair richer now for reasons not well understood by me. I expected the opposite.
As far as power, so far it is a half mile an hour slower on top (richer), feels about the same at lower speeds with a little bit more noise. I'm cool with that, I mostly ride between 19 and 24, about half throttle most the time.
It looks better than the baloney pipe hanging off the engine, and is up out of the way. They got the curve just right on the downpipe, it looks pretty good.
My rubbers aren't helping the looks, I might get an old bud to weld it over at his house but he's 50 miles away, so they'll do for now.
I hope this helps guys looking at these pipes like I was. They're easier to install on a standard size frame, no doubt.
The poopoo is louder and nastier sounding, with sharp pips and blaps.
A hair slower
A hair richer (on my bike)
A bit cooler running.
Hope this was of some use to someone looking at the poopoos.
Thanks!
