Howdy Folks --

I've owned Mr. Spock for several months now and for the first time today he made a fairly loud high-pitched nosie (squeal) right at start-up. It sounded like metal on metal at the same rpm as the engine. Fortunately it only lasted about 15 -20 seconds. The bike was in neutral on the side stand with the choke on. This was part of the usual warm-up and I was not sitting on the bike or attempting to take off.

The only recent modification I've made is to insert a spacer on the shaft of the shift pedal to reduce the play from about 1/2 inch to 1/8 inch. Could this have any effect?

After the noise stopped I could not detect anything different. So I went for a 20 mile ride and returned with no noticeable noises or problems.

I read through the Verses about so-called 'coffee grinder' noises. Is this what I experienced or does it seem like something different?

Thanx in advance! :beerchug:

the coffee grinder is during take-off not starting. did you check your oil?

How long had she been sitting? What weight of oil? How cold outside when it happeaned? have you been shoving gerbils up your tailpipe again?

Howdy Folks --

I've owned Mr. Spock for several months now and for the first time today he made a fairly loud high-pitched nosie (squeal) right at start-up. It sounded like metal on metal at the same rpm as the engine. Fortunately it only lasted about 15 -20 seconds. The bike was in neutral on the side stand with the choke on. This was part of the usual warm-up and I was not sitting on the bike or attempting to take off.

The only recent modification I've made is to insert a spacer on the shaft of the shift pedal to reduce the play from about 1/2 inch to 1/8 inch. Could this have any effect?

After the noise stopped I could not detect anything different. So I went for a 20 mile ride and returned with no noticeable noises or problems.

I read through the Verses about so-called 'coffee grinder' noises. Is this what I experienced or does it seem like something different?

Thanx in advance! :beerchug:

Keep an eye on it and PM me if the noise persists. :smiley_th

Starter clutch?

nope you all are completely wrong.... i know exactly what it is... its his wife yelling at him to take out the trash!!!

Keep an eye on it and PM me if the noise persists. :smiley_th

Okay Lance, will do. I'll keep my fingers crossed and hope it doesn't happen again.

My thanx to everyone who responded! :beerchug:

Mine is doing this too, but I think I know what mine is. I had this noise last year as well. Turned out I lost a clamp for the heat shield on the exhaust allowing it vibrate. New clamp no noise. This time I think it's the heat shield again but caused by what used to be a small crack towards the center that has now made it all the way to the edge allowing it to vibrate again.

Mine is doing this too, but I think I know what mine is. I had this noise last year as well. Turned out I lost a clamp for the heat shield on the exhaust allowing it vibrate. New clamp no noise. This time I think it's the heat shield again but caused by what used to be a small crack towards the center that has now made it all the way to the edge allowing it to vibrate again.

The noise has not recurred in about 30 miles and half dozen start ups! (fingers crossed) However, I also lost a clamp (rusted off) on the left side heat shield. So, I'm temporarily using a hose clamp. I'll check both heat shields closely.

Thanx for your response WV! :beerchug:

Ah...I think I've got an idea what it might've been.

Background: last time I changed my stator, I never got the circlips seated properly on the shift shaft. On startup, I got that metal-on-metal screech for about 10-15 seconds; never did it again.

Update: On removing the stator cover the other day, preparatory to changing the stator again (new this time instead of used), I found the outer washer on the shaft ground down to a 3/4 circle with a flat side. Apparently, when I cranked it up, the washer got caught at just the right angle to jam between the shaft and the balancer gear. Once the gear ground enuff of the washer off, it didn't touch anymore; no more screech, and hasn't happened since (18 months ago). With part of the washer ground off, the heavier side of it would keep it out of the balancer.

I'd almost bet that when you pulled the slack out of the shifter shaft, it pulled that washer into contact with the balancer gear, bending the washer over just enuff to jam it; screeeeeeeech!

Just a thought... YMMV

Jim

Ah...I think I've got an idea what it might've been.

Background: last time I changed my stator, I never got the circlips seated properly on the shift shaft. On startup, I got that metal-on-metal screech for about 10-15 seconds; never did it again.

Update: On removing the stator cover the other day, preparatory to changing the stator again (new this time instead of used), I found the outer washer on the shaft ground down to a 3/4 circle with a flat side. Apparently, when I cranked it up, the washer got caught at just the right angle to jam between the shaft and the balancer gear. Once the gear ground enuff of the washer off, it didn't touch anymore; no more screech, and hasn't happened since (18 months ago). With part of the washer ground off, the heavier side of it would keep it out of the balancer.

I'd almost bet that when you pulled the slack out of the shifter shaft, it pulled that washer into contact with the balancer gear, bending the washer over just enuff to jam it; screeeeeeeech!

Just a thought... YMMV

Jim

Hey Jim --

As Mr. Spock would say, "That sounds very logical, Captain." Is there any chance the washer might cause any more problems?

Your post is very helpful.

Many Thanx!!:beerchug:

Hey Jim --

As Mr. Spock would say, "That sounds very logical, Captain." Is there any chance the washer might cause any more problems?

Your post is very helpful.

Many Thanx!!:beerchug:

If that was the problem it won't be a problem anymore. :beerchug:

If that was the problem it won't be a problem anymore. :beerchug:

Okay, I'm not "logical" like Mr Spock so that helps to calm the worry wort part of my brain.

Thanx! :beerchug:

Hey Jim --

As Mr. Spock would say, "That sounds very logical, Captain." Is there any chance the washer might cause any more problems?

Your post is very helpful.

Many Thanx!!:beerchug:

<G> As Lance said, "If that was the problem it won't be a problem anymore."

IF it was the washer, when it ground it down, it left most of the weight of the washer below the centerline of the shift shaft, and since the shaft isn't constantly rotating, the washer ain't gonna spin back up to get in the way. Unlikely it would if the shaft did rotate...

Jim

<G> As Lance said, "If that was the problem it won't be a problem anymore."

IF it was the washer, when it ground it down, it left most of the weight of the washer below the centerline of the shift shaft, and since the shaft isn't constantly rotating, the washer ain't gonna spin back up to get in the way. Unlikely it would if the shaft did rotate...

Jim

Thanx JD -- That helps to put my mind at ease!