RD200 Expansion Chambers... Do they exist anymore?
- Thread starter VonYinzer
- Start date
There are a couple of guys in the UK making weld together kits for them, but you'll need a tig guy to assemble them for you. The vintage ones are made by Micron from the 80s and were pretty common. I see them pop up occasionally. From what I have seen, you can get other similar cc bikes from the era that had a bigger aftermarket following like benelli and modify them. Head to chamber inlet is supposed to be 15" with a 3800cc chamber.
Those Allspeeds are really long and on long headers too. Time to roll your own. If you can accurately measure the ports and few other bits, I'll design a set for you and run simulations to see how well they work. If you want to roll your own, PM me.
You could use TA125 pipes but that would require riding between 10 and 12k all the time and that wears you out really fast.
You could use TA125 pipes but that would require riding between 10 and 12k all the time and that wears you out really fast.
Ta125 pipes could sap some of your power as the port opening and closing times are a fair bit different even from the rd125 motor the the ta125 motor is based on. So the positive and negative waves would be off from timing wise. There is all so the change that this would give you a much small power band to work with. Find out the port opening and closing times and any other if
It needs port widths, angles, height, duct shape and few other things to work on the simulator software, so it takes a bit of time to measure them all. The TA125 was obviously tongue in cheek. You could port an RD to match those pipes but the volume would still be too small and it would have morphed into a race bike that's unrideable on the street.
650hardtail
Been Around the Block
VonYinzer said:
one of the guys going to bloomfield w me is into the rd's...im sure he knows of a source of chambers..
just remember to ask us..