Huh, I guess I'm just confused then, because the only reference to a
starter clutch I can find in my service manual is under the part for the
electric starter gears, and it says you have to remove the crankshaft to
access. Is the starter clutch located on the starter itself, or inside
the engine?
On 3/16/2010 8:56 PM, Dennis Hammerl wrote:
Whoa.. stop. Cracking the crankcase open ? No way. The starter clutch
is on the end of the crank. Now get a grip. The starter motor turns
the driven gear and the driven gear runs against three rollers in the
clutch body. When all this works right, the rollers jam up and the
whole thing turns as one. When the motor starts, the rollers spin
free. They "cam" up to start. When the starter clutch is cracked, it
opens up a bit and the rollers don't jam. Hence... it doesn't work.
I've seen lots of 'em. They hook up just fine by hand, not with a ton
of force. It's fooling you. You'll need one special tool, a rotor
puller. Threads in against the crank and as it tightens, it forces the
rotor off. Clutch right behind it. Get a used one and inspect it for
cracks, no new parts anymore. Getv the driven assembly too. Inspect
for smooth surface, waves are only for the beach. Wrecked bikes are
best for motor parts 'cause that why they are there, not mechanical
failure. Parts same for any 400~450 twin. Order a new cover gasket,
that you will need.
------------------------------------------------------------------------
*From:* Chuck Bridge <[email protected]>
*To:* [email protected]
*Sent:* Tue, March 16, 2010 11:33:55 PM
*Subject:* Re: [Nighthawk Lovers] Starter problem?
Thanks for the reply, Dennis.
For my own edification, what part of my description makes it obvious
that the starter clutch is bad? From what I've read, it's only
supposed to turn one way, which mine still does. I'd like to make
doubly sure that this is the problem before I start cracking the
crankcase open.
Chuck
On 3/16/2010 7:57 PM, Dennis Hammerl wrote:
Yes. The problem is a cracked starter clutch. Replace it and ride on.
------------------------------------------------------------------------
*From:* Chuck Bridge <[email protected]>
*To:* [email protected]
*Sent:* Tue, March 16, 2010 6:42:40 PM
*Subject:* [Nighthawk Lovers] Starter problem?
I finally was able to start my '82 CB450SC this weekend. I bought it
after it was sitting in my friend's garage for about 5-6 years. He
originally garaged it with an intermittent starter problem, saying
that he could hear the starter spin, but the engine wouldn't turn
over. When I got the bike, the starter was missing, so I picked up a
used one from the local salvage yard, and installed it. After
finishing dealing with the rust in my tank, and making sure my carbs
aren't all nastied up, I got it running. Took a couple of attempts,
but it started, and ran for about a minute. I then turned it off,
and attempted to start it up again a couple of minutes later. Now, it
appears that the starter problem that it was originally garaged with
is back. If I try to turn the bike over, I can hear the starter
whirring, but not engaging. I pulled the starter out to make sure
that the teeth were all still there, and they are.
Any ideas?
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