a/c man
Member
This is my latest configuration on my 2nd expansion chamber "experiment"
I went with larger diameter 1 1/8" diameter tubing instead of the customary
7/8" in an attempt for more breath-ability since these pipes were originally designed for 47-49cc pocket bike engines.
I had to fabricate my own flange, but that was a good thing since I could make the opening much larger to match the exhaust port on the engine jug.
Gone is the worry of burning my leg on the pipe since it's down by the bottom bracket. I also got to keep my kick stand.
This is one of 2 pipes I got on E_BAY. I picked them up for $10 a piece on sale in March or so. Actually he mailed me 2 but I only paid for 1!!!! That's $5 a piece.
Power is noticeably better than stock, but about the same as my other pipe I had previously.
It tucks nicely between the peddle cranks and rear tire.
It's all brazed up since I'm not really keen on the look of the silicone couplings that are out there. Looks a little more clean. It's 12 inches from the engine port to the start of the 1st cone's taper. Jetting stayed at .70mm.
I went with larger diameter 1 1/8" diameter tubing instead of the customary
7/8" in an attempt for more breath-ability since these pipes were originally designed for 47-49cc pocket bike engines.
I had to fabricate my own flange, but that was a good thing since I could make the opening much larger to match the exhaust port on the engine jug.
Gone is the worry of burning my leg on the pipe since it's down by the bottom bracket. I also got to keep my kick stand.
This is one of 2 pipes I got on E_BAY. I picked them up for $10 a piece on sale in March or so. Actually he mailed me 2 but I only paid for 1!!!! That's $5 a piece.
Power is noticeably better than stock, but about the same as my other pipe I had previously.
It tucks nicely between the peddle cranks and rear tire.
It's all brazed up since I'm not really keen on the look of the silicone couplings that are out there. Looks a little more clean. It's 12 inches from the engine port to the start of the 1st cone's taper. Jetting stayed at .70mm.