Firstly.. The Street Cup.. as lovely as it is, is part of last.. sadly underpowered lot of 900s. The same as my Street scrambler.. Be careful what you change. I performed a decat with cheap straight through headers keeping the stock mufflers and lost a whole heap of power and top end. Sounded awesome tho.. You can get an xpipe for yours which makes a huge difference in sound and frees it up.. if you read some of the threads on here, It gives it a bit more 'pep'. I've learned that gas flow and back pressure are quite an exact science..
Check out TEC tho for decent aftermarket mufflers.. I could be wrong but think they put a bit of effort into them, they do a decent X pipe by all accounts too.
The new '19 street twin is different performance wise with I think.. lightened cranks and modified cams and bells and whistles and probably different fuelling maps and so probably a different exhaust flow.. and an extra 10 or so hp too I believe.. I'm no expert but that 'new' sound could well just be tied in to the '19 models update.
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Last edited by EmptyMelon; 08-21-2019 at 02:52 AM.