Motorbike turns over super slow and won't start

[richie37]

Hi everyone I need a bit of help I have a kawasaki zr7 1999 that will crank over really slowly drains the battery and terminals get warm. I have taken the spark plugs out and it turns over great put the spark plugs back in and it turns over slowly. I've taken the starter motor out of the bike and wired it up with jump leads and it spins over  fine. I am able to spin the engine by hand so the engine isnt seized. Any advice would be appreciated cheers 

Edited September 29, 2023 by richie37

[Stu]

Hi and welcome to the forum 

 

Have you tried a new battery? 

[richie37]

Yes I bought a new battery yesterday. The bike had been standing for 10 years. I've lubed the piston barrel before I even tried to turn the engine over by hand. I've replaced the starter solenoid, the brushes in the starter motor and 2 ground  and 1 live cable.

[fredc]

hot terminals are usually caused by loose or dirty connections

[richie37]

Ok fab thanks for the information il double  check everything over the next few days

[Mississippi Bullfrog]

Pay particular attention to the earth lead where it connects to the frame. That's the most common source of poor connection. 

[RideWithStyles]

Just another thought.

Spins over fine you say when its out but is it weak? When its under strain of internal compression is it really cranking over enough?