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View Full Version : Anyone convert a factory 4/2 into 4/1 exhaust?


SlipKid
01-28-2007, 05:23 PM
I posted about this in another thread, but though posting a new thread would be more appropriate.

The '94 Kat 600 poject bike I just bought has had the factory dual exhaust and modified by cutting the muffler off one side and welding a connector pipe from that outlet to the other muffler. It was not done with particularly good craftsmanship, but that's beside the point...

I haven't got it to running condition yet to see how this affects performance, but my guess is it would be restrictive. Since the one remaining muffler appears to be stock (not opened-up in any way), this system would theoretically only flow half as much now. Question is, does the system have excess flow capacity as standard, so one muffler would flow enough. My guess is no, but it's only a guess.

Has anyone heard of someone doing this, and the results from that mod?

brooder
01-29-2007, 08:49 AM
Put on a 98+ exhaust system. The headers fit and the pipe is a single. The only thing you'd have to do is peen down the collector a bit to clear the oil pan. that can be alleviated by putting on a 98+ pan as well.

TheWrightKat
01-29-2007, 11:17 AM
yeah what Brooder said I think.

kwebbel
01-29-2007, 05:12 PM
I posted about this in another thread, but though posting a new thread would be more appropriate.

The '94 Kat 600 poject bike I just bought has had the factory dual exhaust and modified by cutting the muffler off one side and welding a connector pipe from that outlet to the other muffler. It was not done with particularly good craftsmanship, but that's beside the point...

I haven't got it to running condition yet to see how this affects performance, but my guess is it would be restrictive. Since the one remaining muffler appears to be stock (not opened-up in any way), this system would theoretically only flow half as much now. Question is, does the system have excess flow capacity as standard, so one muffler would flow enough. My guess is no, but it's only a guess.

Has anyone heard of someone doing this, and the results from that mod?


Never heard someone doing this but the stock mufflers are absorbtion-damped mufflers, guess it won't be that restrictive, would be something else if they were mechanically damped.

SlipKid
01-29-2007, 08:14 PM
Absorbtion damped? Does this mean that they use fiberglass packing around a perforated tube instead of metal "barriers" and "passages" inside of the muffler?

It sounds like a 98+ is the way to go, especially since they can be disassembled at the mid-pipe. Shipping a pre-98 would be ridiculuosly expensive, as they are duals and don't come apart lengthwise!

kwebbel
01-30-2007, 01:40 PM
Absorbtion damped? Does this mean that they use fiberglass packing around a perforated tube instead of metal "barriers" and "passages" inside of the muffler?


right.