Fario
Pack Dog
After some research on this forum and the net, I decided to fit a Scorch silencer to my 2007 Dakar. (There are photos posted in another thread). My primary objective was to save weight, look better and to improve the anemic sound of the stock system. I was a bit concerned about reports of increased fuel consumption, which I had read on previous threads relating to aftermarket systems fitted to the Dakar.
I managed to get an oval pipe and fitted it myself with minimal hassle. Plus point for me. The price was also good. (I paid R 1600 for a can that was used for 1 day - previous owner found it too loud!) I was a bit worried about the exit hole diameter being too large and reducing backpressure too much, with a possible loss of midrange torque as a result.
First ride confirmed my fears. The "free flow" character of the pipe resulted in loss of midrange with a slight gain at the upper end of the rev range. As a result, one rides the bike harder to get into the meat of the powerband. The result of this is obviously increased fuel consumption. I experienced this as my cnsumption dropped to about 20km/l (from 26). Sound was loud but ok, imo.
Next I set about fixing the backpressure problem. I machined up some alumium insers with internal diameters of 25 and 38mm. (the stock Scorch is 50mm). I fitted these to the tailpipe of the can and tried them out.
Result: The 25mm insert reduces noice appreciably and restores midrange. Lovely stuff. :biggrin: Very happy with this setup. The 38mm is more revvy.
Will post photos soon.
Regards
F
I managed to get an oval pipe and fitted it myself with minimal hassle. Plus point for me. The price was also good. (I paid R 1600 for a can that was used for 1 day - previous owner found it too loud!) I was a bit worried about the exit hole diameter being too large and reducing backpressure too much, with a possible loss of midrange torque as a result.
First ride confirmed my fears. The "free flow" character of the pipe resulted in loss of midrange with a slight gain at the upper end of the rev range. As a result, one rides the bike harder to get into the meat of the powerband. The result of this is obviously increased fuel consumption. I experienced this as my cnsumption dropped to about 20km/l (from 26). Sound was loud but ok, imo.
Next I set about fixing the backpressure problem. I machined up some alumium insers with internal diameters of 25 and 38mm. (the stock Scorch is 50mm). I fitted these to the tailpipe of the can and tried them out.
Result: The 25mm insert reduces noice appreciably and restores midrange. Lovely stuff. :biggrin: Very happy with this setup. The 38mm is more revvy.
Will post photos soon.
Regards
F
