As stated my 1980 Kawasaki KZ440 motorcycle starts VERY easy. After you ride about 10 miles or so it starts loosing power. After you stop it, it will barely crank untill it cools, once it cools off. the touch of the button and Vrrrrrm, starts instantly, Please Help.....
2006-09-23 14:54:50 · 5 answers · asked by Andrew S 3 in Cars & Transportation ➔ Motorcycles
Since the engine is hard starting when hot, and starts easily when cool it could be two problems. 1 Causing it to lose power and 2 Hard to turn over when hot. One probelm that can cause both is overheating, the pistons grow to big and start sticking, when they cool off vroom vroom! Look at the header pipe is it blue all the way down to the bottom of the bike? That would be a sure sign of overheating. Another place to look could be a too lean carb,but you say it starts easily so I won't put too much stock in that idea. Check your oil level and make sure you use a motorcycle oil not car oil. In that bike in a warm climate you should be just fine with a 20w50. With out seeing the bike that's my best guess. Good Luck
2006-09-23 15:14:11 · answer #1 · answered by knujefp 4 · 0⤊ 0⤋
As mentioned, it could be an electrical problem, or it could be a compression problem.
Do a cranking compression test on each cylinder. You should have at least 120 psi (probably higher, I don't have a manual on the KZ), and all cylinders should read within 10 psi of each other. If you have one cylinder reading low, or all of them reading below 100 psi, then it's time for boring and new pistons.
If the compression test is good, then try installing new spark plugs. Take the bike for a ride, and when it dies, remove one plug (leave your gloves on), and check for spark. Do the same to all the plugs. If it's ignition, you will see one or all plugs with no spark.
These are the two most probable reasons, but there are many others - you'll need to do these two tests to narrow it down.
Hope this helps.
2006-09-24 10:24:28 · answer #2 · answered by ducatisti 5 · 0⤊ 0⤋
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2016-12-12 13:50:41 · answer #3 · answered by mijarez 4 · 0⤊ 0⤋
Sounds like... your carbs need an adjustment. Get a gauge and adjust. Also, you might want to look into your ignition, if the coil is failing once it heats up, it could be shorting out until it cools.
2006-09-23 14:58:24 · answer #4 · answered by Anonymous · 0⤊ 1⤋
it does sound like the coil to me. something in the timing-spark area anyway
2006-09-23 20:06:58 · answer #5 · answered by XT rider 7 · 0⤊ 0⤋