Advice Needed...street Cup

Dave61 · Oct 15, 2017

I hope I am posting in the right place. On a couple of occasions my street cup has made a sound almost like a piston slap when blipping the throttle when slowing down for a roundabout.

Friends have advised that I use a higher octane fuel and also that the ecu will adapt to my style of riding (whatever that means)!

I’m not overly concerned as the bike engine is a dream but I am curious as to why the bike does this, hopefully all is well.

Thank you in advance for any advice given.

thebiglad · Oct 15, 2017

Dave61 said: ↑

I hope I am posting in the right place. On a couple of occasions my street cup has made a sound almost like a piston slap when blipping the throttle when slowing down for a roundabout.

Friends have advised that I use a higher octane fuel and also that the ecu will adapt to my style of riding (whatever that means)!

I’m not overly concerned as the bike engine is a dream but I am curious as to why the bike does this, hopefully all is well.

Thank you in advance for any advice given.
Click to expand...

Like all the new Bonnys, your bike has a 270° crankshaft and as a result can sometimes make a slightly odd noise as you blip throttle with the clutch in.