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Discussion Starter #1 (Edited)
Hi All,

PROBLEM SORTED - SEE NEXT REPLY

Bought my self a HP Corse (Hpcorse Hydroform Exhaust Slip-on Ceramized Inox Black Not Homologated for Ktm Duke 390 - Xkthy1039black-ab)
Since its a slip-on I presumed I didn't need a re-tuning but when I started it up it popped a bit when I reved it a bid hard(still cold engine, I know it needs to be warm before reving)
I have a booster plug installed(to take the worse of the jerking at low rev) so really thought there should be no issue!?

Anyone with idea?
 

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Discussion Starter #2 (Edited)
Went for a 200km ride, no popping at all so ignore the starting thread.

But in regards to the exhaust it self, its awesome.

Low rumble sound when cruising, and good groule when on the gas.

Build quality is flawless and fits perfectly. And then it only ways 1 kg 馃檪

51433
51434

51436

51435


From there website
51437

51438
 

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I like the look actually
 

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Hi All,

Bought my self a HP Corse (Hpcorse Hydroform Exhaust Slip-on Ceramized Inox Black Not Homologated for Ktm Duke 390 - Xkthy1039black-ab)
Since its a slip-on I presumed I didn't need a re-tuning but when I started it up it popped a bit when I reved it a bid hard(still cold engine, I know it needs to be warm before reving)
I have a booster plug installed(to take the worse of the jerking at low rev) so really thought there should be no issue!?

Anyone with idea?
have you got the oem air filter still in the bike? Maybe change to K&N?
 

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Probably the ecu adapting as well...
 
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