| Author | Message | ||
     Cato |
Does anyone know if Supertrapp ever made a complete exhaust system for tube frame Buells, specifically post 1999 M2 Cyclones. If not, did they make a slip on muffler to be used with the Buell race header? Any info on this subject would be appreciated. I recently acquired a 2002 Cyclone with a damaged Supertrapp muffler. I purchased a new Supertrapp slip on, but it will not properly mount to the header. I now believe the bike may have the Buell race header and that is the reason why the Supertrapp slip on doesn't fit. | ||
| Hootowl |
No complete system. They made a slip on. Buell OEMd their pro series exhaust through them also. It fits the stock header. | ||
| Phelan |
Supertrapp made the OEM headers for pre-'94 tube frames Buells and some S2s, though Buell later in '95 switched suppliers to Custom Marine. Supertrapp didn't make any M2-related headers though. | ||
| Screamer |
Supertrapp also provided the muffler used on the early tube frame race systems, before they were offered as a retail sale component. Like the others stated, no full system for tube frames built by Supertrapp. | ||
| Ratbuell |
Header ID: Factory OEM for an '02 domestic market M2 will have a 2.5" outlet/collector, pointed ACROSS the motorcycle. The "elbow" is part of the muffler. Race headers for any tube frame Buell will have a 2.5" collector pointed to the REAR of the motorcycle. The "elbow" is part of the header. | ||
| Al_lighton |
The original supertrapp slip-on for the 2.5" headers had a separate J pipe that wasn't an integral part of the muffler. The problem was the way they attached the J-pipe to the muffler through a short stub pipe was a poor design. The front end cap of the muffler was cold formed, and the stub was welded to it on a cantilever, which invariably cracked the whole way around. And the front hangers were also poorly designed. These older Supertrapps would mate right up to a Buell race header if you didn't use the supplied J pipe. If you added a second fillet weld the whole way around the stub pipe on the front of the muffler, the failure mode was gone. I've been running one of these on my race header for years. They changed the design so that the J pipe was integrated into the muffler, and put larger double front hangers on it. This is the pipe that Buell sold through P&A as the Pro Series Slip on. You can't mate these to a race header. The old ST's are very hard to find. Most failed because the owners didn't add the 2nd weld BEFORE the breakage occurred. Al | ||
| Greg_cifu |
Hey Phelan, where did you read / learn that Supertrapp made the pre-'94 headers? Man, that is a nugget of gold! Some of the earliest '95s got them too? I need one for my RR restoration. I have an S2 as a substitute but, would like the real deal. Aww, hell, Kerker bought them since then, haven't they? I'll bet all that tooling is long gone. | ||
| Phelan |
I believe I read it from Brenkin or Court years ago. I wish I could help you find a header for your project! I know where a few are, but they are on their respective bikes :P. | ||
| Screamer |
I can confirm tonight but (if I remember correctly) early S2 headers made by Supertrapp had multiple joints/welds where as the later Custom Marine headers did not, making it easy to tell the difference. Not that it's really relevant to Cato's question but to add to Lighton's comment - the early race system headers were 2.5 and pointed rear-ward (like Ratbuell stated) and came with 2.5 inlet Supertrapp muffler but no J pipe was provided. I've run the same race system for ~18 years with no issues (except for the re-packing required). | ||
| Phelan |
True, my apologies Cato for not staying on target. I just wanted to elaborate on the Supertrapp-Buell relationship a little bit  . And yes Screamer that is correct, the Supertrapps had visible joints in the front primary, whereas the Custom Marine units did not. | ||
| Cato |
Can someone tell me how the Buell race header differed from the stock header on a late model (1999-2002) M2 Cyclone? | ||
| Cato |
Disregard the previous post. I missed Ratbuell's previous post on Header ID. | ||
| Lakes |
Cato, Buell stock header comes from head ports bends at front of motor & has the header collector at front of motor, so the muffler needs to have length of pipe same diam as collector with one 90 degree bend. the race header, comes from head ports bends at front of motor then bends again to face rear wheel then has collector 2.5" so the race muffler just has a short straight length of pipe to collector | ||
| Blackm2 |
An added question to this thread, is this an open endcap that someone welded closed?  | ||
| Phelan |
Somebody didn't want to spend $10ish to pick up a close cap? lol. Closed caps commonly have a small hole drilled in the center for the AFR reader on a dyno, but that's first I've seen of anything like THAT. | ||
| Lakes |
supertrapp might work good for some, but they never worked for me, i tried all combinations. took it off put stock duel head era & slip on cycle shack mufflers & went quicker & 12mph faster in 1/4mile nothing else changed that was on a twin cam 88 dyna |
