SOHC.co.uk Forums > CB650

CB650 Nighthawk Starter Motor Problem

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Clunker:
Hi folks, help needed with my new purchase, US import CB650 Nighthawk SOHC. When I try the electric start I get a clunking sound like like cogs mashing together. My question is, does this sound like a starter motor or starter clutch issue, or even both? It sounds like the cogs are slipping and doesn't turn the motor over, I rocked the bike forward and backward in gear then tried the starter again and it seemed to turn the engine for a second or two then made the same clunking sound. All I have done is pull the starter motor and looked at the cog which seemed fine, then stuck my finger in the hole and rotated the gear inside, it went clockwise freely but only went so far the other way then locked.

mike the bike:
It's supposed to only turn one direction,  it's the roller clutch mechanism.   It does sound a bit drastic and will probably need stripping.

Clunker:
Thanks for your reply Mike. I've got an idea to put the starter motor from my CB650C on to the Nighthawk and see what the result is. I want to try the easiest options first, I've read on the interwebby that if it is the starter clutch then it is possible to repair it without taking the engine out. I'm hoping that it is just the starter motor that is at fault.

mike the bike:
That's great if you've got a spare starter motor,  lets hope it's that that's faulty but it does sound like the starter clutch.   Pity you haven't got a kickstart

Clunker:
No kick start and nowhere to bump start it either. I haven't had the bike running at all yet, it was sold as a non runner but I've always wanted one so to me it is just a minor inconvenience. I'll start spannering in the morning so I'll let you know what occurs.

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