starter motor dead :o(

hi guys, know ive got a problem with a different bike, but im sure that the basics are the same.

basically, dropped a new battery in yesterday and tested the bike, it was fine.

today, come to start the bike, but no luck
the starter motor spins, but it feels and sounds like its missing something, and alas the bike doesnt start, it wirrs loudly, but doesnt make that scraping turning noise like it should, nor does the bike vibrate as it usually does. and it doesnt start

the battery has been sitting on the optimate for the last 24 hours, so i doubt its the battery dying, nor do the headlights dim or anything, battery feels full of life.

any idea's ?

Warren

Starter motor clutch?

I dunno

Matt

[yorkie_chris]

I think its time to take the starter out and check that the shaft is still intact, it could just be sticking and not engaging so cleaning it up is probably a good start.

[Spanner Man]

Morning all.

Firstly what bike is it?

Assuming your battery is in good order it could be the starter clutch not engaging, try turning the engine backwards with a socket, it should be a lot harder to turn than it is when turning it in the normal direction. If it feels the same, then it could be your starter clutch.

Cheers.

Originally Posted by Spanner Man

Morning all.

Firstly what bike is it?

Assuming your battery is in good order it could be the starter clutch not engaging, try turning the engine backwards with a socket, it should be a lot harder to turn than it is when turning it in the normal direction. If it feels the same, then it could be your starter clutch.

Cheers.

its a CBR600F1,

i assume the battery is fine, as i put a brand new battery in there, and started it a few times and it started no problems and the starter seemed stronger than ever.

also, when i hit the starter, the lights didnt dim, like they did with my old battery.

i stuck the battery on the optimate and let it charge for a few hours, and still no luck with the starting

[Spanner Man]

Morning all.

If the starter motor is spinning, then it's got to be an issue with the starter clutch.
Remove the inspection cap on the left hand side engine cover, underneath you should see the alternator retaining bolt. Rotate the engine clockwise with a suitable socket, it should be a lot harder to turn than if you rotate the engine in an anti-clockwise direction, which is the normal direction of rotation.

If the engine feels more or less the same in both directions, then you're going to have to remove the alternator rotor to access the starter clutch, which is mounted on the back of the rotor.

It could be as simple as the rotor retaining bolt coming loose, thereby allowing the rotor to slip on the taper on the crankshaft. I have seen this problem several times, mainly on Suzukis with the GSXR/Bandit type engine.
I wouldn't keep trying to start it in the hope of it suddenly working, for if the rotor is slipping on it's taper you could score the crankshaft.

Cheers.