How to increase top end speed - 2007 Kawasaki Ninja EX250R

kawasaki ZX models are known for sub throttle valve issues. they will cause low top speed problems. FYI if the "emissions warranty" is not expired on your bike it may cover this. contact a dealer

batt could be slightly weak-maybe at 12.4volts--test it for 12.6 the standard------chec connections---------also carbs cud need pro cleanin and ajust

sounds like it might be a Chinese made bike.you might try(ZHEJIANG CHAOZHONG MOTORS)good luck i had a hard time finding parts for mine.

LET BIKE SIT FOR 5 MIN. STAND BIKE STRAIGHT UP.(WITH OUT KICK STAND TOUCHING GROUND) LOOK ON RIGHT SIDE OF BIKE THROUGH SIGHT GLASS. OIL SHOULD BE HALF TO A LITTLE ABOVE CENTER OF GLASS

Drain all the fuel and put super high test in it, look for cracks or any leaks from the heads and cylinder walls

There are adjustments on carbs for low speed air intake (air mixture screw)find out factory settings and reset that mixture.Sounds to me like those adjustments are out of sink.If so the bike will run very bad from idle to about 1/4 throttle then run great from there up to full throttle.this definitly sounds like carb problem.

http://faq.ninja250.org/wiki/What_do_I_need_to_know_about_keys%3F#What_if_I_lose_all_my_keys.3F

You mean the front wheel? Get the bike supported high enough to get the wheel off, Pull the caliper, hang it up with a wire, pull the nut, pin, and a couple bolts on the fork bottom,? (some bikes) and drive out the axle, the speed control thing will fall right off, attached to the cable. Hope this helps.

about 159mph. Top speed depends on a lot of things: rider weight, gearing, tire profile size..even when i raced i swear wearing a different style helmet coming out of turn#9 at willow springs into the wind i could feel the pressure building up and especially if you don't tuck down all the way...so if you weigh 200lbs, have a nice wheelie sprocket on the back with a real wide low profile cool looking race slick i'm sure you'll lose 10mph easy. so taking the avg. probably about 154mph. and then don't forget about speedo error of usually 3% at the high end, so this all works out to @ 150mph true speed. Not bad for a 12 year old bike!

Twice a year or every 4000 miles.

Use 10w40 motor oil in the gear box. Don't use any synthetic oils, oil marked "EC", or oil with "special" additives. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell. If in a hot area like Texas or New Mexico go with 20w50.