ninjette.org - View Single Post - Bike done about 24000 miles, never a valve adjustment, feels weaker.

Norway · April 2nd, 2017, 02:20 PM

My Ninja 250 bought new in 2012 has now gone about 38 600 km, or 24 000 miles. Last year, and this spring, I believe that the engine has become weaker than what it was with about half the mileage.
The acceleration might be weaker, and the indicated tow speed is probably lower. When the bike was never, I easily reached an indicated 155 kph, or slightly above 90 mph. Last summer it was hard reaching close to 150 kph,
even in what might have been a slight downhill.
Valves were inspected at 24 000 km. They were within spec, according to the
Bike shop.
The bike has been used for my daily 45 minutes commute (each direction)
and serviced yearly.
When the engine feels weaker, what's normally the cause? Is it likely to improve if valves are adjusted, you think?
(Once had a Kawasaki ZX 11. After a valve adjustment and tuning of carburators it definately became stronger and faster).
Thanks.

April 2nd, 2017, 02:20 PM	#1
Norway ninjette.org member Name: S n 0 r r £ Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22) Join Date: Sep 2012 Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or Posts: 146	Bike done about 24000 miles, never a valve adjustment, feels weaker. My Ninja 250 bought new in 2012 has now gone about 38 600 km, or 24 000 miles. Last year, and this spring, I believe that the engine has become weaker than what it was with about half the mileage. The acceleration might be weaker, and the indicated tow speed is probably lower. When the bike was never, I easily reached an indicated 155 kph, or slightly above 90 mph. Last summer it was hard reaching close to 150 kph, even in what might have been a slight downhill. Valves were inspected at 24 000 km. They were within spec, according to the Bike shop. The bike has been used for my daily 45 minutes commute (each direction) and serviced yearly. When the engine feels weaker, what's normally the cause? Is it likely to improve if valves are adjusted, you think? (Once had a Kawasaki ZX 11. After a valve adjustment and tuning of carburators it definately became stronger and faster). Thanks.