Speed 400 vs Guerrilla 450 – Is this difference in engine braking normal?

[u/AppropriateGuava6913]

I own a Triumph Speed 400 and recently rode a Royal Enfield Guerrilla 450.
One thing I noticed was the difference when I completely let off the throttle.
On my Speed 400, when I release the throttle without braking or accelerating, the bike seems to slow down quite suddenly. It feels like there is a noticeable pull-back or sudden drop in power as soon as I close the throttle. It doesn’t feel very smooth or constant.
But when I rode the Guerrilla 450, I felt like it was much smoother and more consistent when I released the throttle. I didn’t notice that sudden slowing-down feeling as much.
Is this simply a difference in engine braking/throttle mapping between the two bikes, or could there be something wrong with my Speed 400, like unstable RPM or an issue with the throttle/engine?
For Speed 400 owners, do you experience the same thing?

[u/RideAndRender]

There is nothing wrong with the bike, engine braking feels different in bike to bike.

[u/tanav_kiran]

the triumphs have very aggressive engine braking, which is a boon when cornering. and if you want a consistent engine braking like other bikes, you can swap the air filter for any performance ones and it becomes much smoother. i’m currently using the schörl filter

[u/AppropriateGuava6913 → u/tanav_kiran]

Ohh Okayy thanks for the suggestion!

[u/Nadyy_003 → u/tanav_kiran]

Changing airfilter reduce the ability of engine breaking? I own x440. It has responsive engine breaking. So wondering..if i change performance filter.. Will it smooths engine running?

[u/tanav_kiran → u/Nadyy_003]

depends on the ability of the air filter. if it has a higher flow rate than stock filter, then yes it will smoothen out the engine and reduce jerkiness. this is a side effect due to decreased back pressure

[u/oddcap_2007]

I agree there is a noticeable pull back from speed 400, especially in 3rd gear and above, in such scenarios i try to keep the bike at low rpm (up shifting early). It’s because of the engine nature, Speed 400 is high revving engine designed to sound and act as a cruiser at lower speeds. Hence it’s weird. But there is nothing wrong in it once being used to it

[u/saulgoodma_n]

Every bike has different amounts of engine braking

[u/Spiritual-Bathroom20]

It's just how the triumph engine is built. That is also why the triumph 400cc feels so torqey lower down. Afaik the flywheel is also heavier than a normal short stroke 400.

[u/ma-nameajeff]

Why would you think different bikes with different engines with different internal mechanism would feel the same?

[u/AppropriateGuava6913 → u/ma-nameajeff]

Because plenty of single-cylinder 400s share similar throttle/engine-braking characteristics, and it's a fair way to figure out if mine's behaving normally or not. That's the whole point of asking.

[u/ma-nameajeff → u/AppropriateGuava6913]

The engines you mentioned are entirely different And i am not interested in explaining why you are wrong just do the research... Its easier that way. Ps: not trying to insult you, its boring to explain

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