DS900X exhaust options — what changes, what doesn't, and the legal side
One of the most-searched DS900X topics. Here's a realistic assessment before you spend.
START WITH THE LEGAL POSITION
This isn't a disclaimer to skim past — it's the part that determines whether your purchase was a good idea.
WHAT AN AFTERMARKET SLIP-ON ACTUALLY DELIVERS
Sound — the real reason people buy
The 270° crank in this engine gives it a naturally offbeat, characterful exhaust note that the stock system muffles heavily. A slip-on lets that character out. This is a genuine and worthwhile improvement if it matters to you.
Weight — modest but real
OEM systems are heavy for durability and noise regulation reasons. A few kilos off, carried high and rearward, is worth slightly more than the raw number suggests.
Power — manage your expectations
A slip-on on an otherwise stock, catalysed, ECU-mapped bike delivers very little. Anyone promising a big power figure from a slip-on alone is selling you something. Meaningful gains require a full system plus remapping, which takes you well outside the road-legal envelope in most markets.
Appearance
Entirely subjective, entirely valid as a reason.
PRACTICAL NOTES
Owners with a slip-on fitted: which brand, what did it cost, is it type-approved in your country, and did the fuelling change noticeably? Sound clips welcome — video links are far more useful than adjectives.
One of the most-searched DS900X topics. Here's a realistic assessment before you spend.
START WITH THE LEGAL POSITION
This isn't a disclaimer to skim past — it's the part that determines whether your purchase was a good idea.
- In most European markets an exhaust must be type-approved and marked accordingly to be road legal. A "race" or "track only" can is exactly that
- Removing or defeating the catalytic converter will fail a roadworthiness inspection in most jurisdictions
- An illegal exhaust can invalidate your insurance in the event of a claim. That is a far larger financial exposure than the price of the exhaust
- Rules differ significantly by country. Check your own national regulations before ordering
WHAT AN AFTERMARKET SLIP-ON ACTUALLY DELIVERS
Sound — the real reason people buy
The 270° crank in this engine gives it a naturally offbeat, characterful exhaust note that the stock system muffles heavily. A slip-on lets that character out. This is a genuine and worthwhile improvement if it matters to you.
Weight — modest but real
OEM systems are heavy for durability and noise regulation reasons. A few kilos off, carried high and rearward, is worth slightly more than the raw number suggests.
Power — manage your expectations
A slip-on on an otherwise stock, catalysed, ECU-mapped bike delivers very little. Anyone promising a big power figure from a slip-on alone is selling you something. Meaningful gains require a full system plus remapping, which takes you well outside the road-legal envelope in most markets.
Appearance
Entirely subjective, entirely valid as a reason.
PRACTICAL NOTES
- Fuelling: the DS900X already has a criticised low-rev throttle response. Changing exhaust backpressure without remapping can make it worse, not better
- Fitment: confirm the part is listed for the DS900X and your model year
- Keep the original. Box it, label it, store it. You'll need it for resale and possibly for inspection
Owners with a slip-on fitted: which brand, what did it cost, is it type-approved in your country, and did the fuelling change noticeably? Sound clips welcome — video links are far more useful than adjectives.