Author Topic: Why Are my Points Breaking/Snapping?? (Read 8650 times)

bollingball · « **Reply #25 on:** May 14, 2012, 01:38:50 PM »

There is no magic to it. I agree don't add any more variables. Get it working stock first then put in HondaMans setup. Some Honda shops sell daiichi points so just because you say they are NOS Honda points does not mean they are TEC they will be stamped. Not only are the springs weak the geometry is off and that is what makes people have to give a little on the adj. or change the slots to get more room for adj. HondaMan has a good write up on this I think it is in FAQ look for the thought of HondaMan.

Ken

Duke McDukiedook · « **Reply #26 on:** May 14, 2012, 01:43:38 PM »

Quote from: lucky on May 14, 2012, 01:05:44 PM

Quote from: Green Goblin on May 14, 2012, 11:43:31 AM
Ya I just ordered two sets of NOS Honda Points. Ive got a Hondaman ignition that I just received so I should install that too... Maybe... magically the problem will stop.

Things do not magically repair themselves.

Sometimes leaky carb orings do, that's the only exception I could think of.

Green Goblin · « **Reply #27 on:** May 14, 2012, 01:49:52 PM »

Sorry guys, I guess it's hard to properly convey sarcasm over the internet. Since this has happened twice in a very short period of time it's quite obvious that it will continue if no action is taken.

I'll take the spark plugs out and turn the motor over by hand once I get home from work.

MCRider · « **Reply #28 on:** May 14, 2012, 02:09:54 PM »

Quote from: Green Goblin on May 14, 2012, 01:49:52 PM

Sorry guys, I guess it's hard to properly convey sarcasm over the internet. Since this has happened twice in a very short period of time it's quite obvious that it will continue if no action is taken.

I'll take the spark plugs out and turn the motor over by hand once I get home from work.

No prob for me. I take "magic" as a figure of speech, not literal. But... Sometimes ... it really seems so.

Spanner 1 · « **Reply #29 on:** May 14, 2012, 05:34:14 PM »

Still skeptical that this happened TWICE

.... but, the points do not look to be the correct ones for your bike as the points plate ( held on with the 1 mounting screw that also allows gap adjustment ) is waaay far from the two adjustment bumps ( at 7 o'clock in your pic. ). Points plate should be almost rubbing on those two 'bumps'. My vote = wrong points fitted. Why it broke?... still no idea

Spanner 1 · « **Reply #30 on:** May 14, 2012, 05:52:16 PM »

Wait !!... I think I got it !.... the reason the point plate is far from the adjusting 'bumps' is because it has moved sideways putting the pivot in the path of the bump on the cam which contacts the pivot arm and the rotational 'swipe' slams the point against the fixed point face...........repeat at crank speed until it snaps.....

mycb750k6 · « **Reply #31 on:** May 14, 2012, 05:53:22 PM »

Why is there no screw holding the points plate in place???

Spanner 1 · « **Reply #32 on:** May 14, 2012, 05:57:24 PM »

Normally l the point plate cannot move sideways as the pivot pin sits in a hole in the main plate BUT if you look at his pic. the pivot pins on those points are much fatter and the points are not locating in the main plate holes... ..wrong points.
One more thing, the tension of the point spring would cause the pivot to rotate into the path of the cam bump and keep it there getting 'bashed' at every rotation...

wrenchmuch · « **Reply #33 on:** May 14, 2012, 06:31:22 PM »

What condition were the point contacts in. Looking at what's left of the broken one it looks like there's been a lot of arcing.
As points operate they weld themselves every time they make contact. You wouldnt want to run 3 ohm coils with points as they wouldnt last long .The higher the current they are switching the stronger the weld. This is the reason the hondaman ignition prolongs point life. It takes most of the current load off the points. Could your condensers be bad ?

dave500 · « **Reply #34 on:** May 14, 2012, 09:40:54 PM »

id expect them to bend way before actualy snapping?

Spanner 1 · « **Reply #35 on:** May 14, 2012, 10:35:17 PM »

3, 4, 5.000 rpm Dave the time between bend and break might be very fast

dave500 · « **Reply #36 on:** May 14, 2012, 10:54:42 PM »

youd have to bend them back and forth in your hands a few times for them to snap i would imagine,its quite a clean break aswell?

ADW · « **Reply #37 on:** May 15, 2012, 05:29:43 AM »

Total guess, but something else to check...maybe the large nut that you use to turn the crank when timing is bent or otherwise screwy such that the backside of the nut is hitting the cam block of the points? It's a stretch, but heck, I know how you feel. Weird problem, can't find anything. I spose look at how the backside of the nut looks as you turn it.

lucky · « **Reply #38 on:** May 15, 2012, 07:02:34 AM »

The OP has not been telling us the truth.

The points plate that is broken has been built with broken parts.
Some kind of home made concoction. All bets are off.
The entire points plate could be wrong.
Matter of fact the points lever with pin could be just sitting on that plate. and the engine could be laying on its side.

Photo of the home made part made in two parts and a photo of a new set of points.
A new set of points has both sides of the contact all made from one part.
You will notice in the first photo the adjustment tabs for the screw driver fulcrum are way off. Also the edges of the points contact have been sawed off with a hack saw.
The points are supposed to be all one part so the distance of the points lever is fixed between the two contacts.-LUCKY

CLICK ON PHOTO to enlarge.

CycleRanger · « **Reply #39 on:** May 15, 2012, 07:13:56 AM »

Oh it's on now!

lucky · « **Reply #40 on:** May 15, 2012, 07:16:12 AM »

Quote from: CycleRanger on May 15, 2012, 07:13:56 AM

Oh it's on now!

Whats On?

Duke McDukiedook · « **Reply #41 on:** May 15, 2012, 08:02:02 AM »

Donkey Kong. It's on like Dokney Kong.

madmtnmotors · « **Reply #42 on:** May 15, 2012, 08:23:27 AM »

Quote from: lucky on May 15, 2012, 07:02:34 AM

The OP has not been telling us the truth.

The points plate that is broken has been built with broken parts.
Some kind of home made concoction. All bets are off.
The entire points plate could be wrong.
Matter of fact the points lever with pin could be just sitting on that plate. and the engine could be laying on its side.

Photo of the home made part made in two parts and a photo of a new set of points.
A new set of points has both sides of the contact all made from one part.
You will notice in the first photo the adjustment tabs for the screw driver fulcrum are way off. Also the edges of the points contact have been sawed off with a hack saw.
The points are supposed to be all one part so the distance of the points lever is fixed between the two contacts.-LUCKY

CLICK ON PHOTO to enlarge.

You are seeing an optical illusion. In the photo below, arrow number one is pointing to the SPRING and arrow number two is pointing to the end of the points bracket (it ain't a pretty edge, just the way this aftermarket manufacturer decided to terminate this edge). The stock points picture that you posted is the opposite set of points and is a mirror image of the point bracket in question. It doesn't help that the broken point bracket has dimples that resemble the dimples in point plate beyond. It makes it difficult to distinguish between the two. I do agree that the fulcrum is way off, not sure if it's the nature of the aftermarket points in question or what.

Green Goblin · « **Reply #43 on:** May 15, 2012, 08:57:15 AM »

Lucky, if you could please do me a favor and not post in this thread anymore I would appreciate it. You are calling me a liar, which I 100% am not. I purchased this bike from a barn for $200, and have pieced it back together to the best of my skill and budget. I am new to motorcycles and was quite pleased with myself when I was able to get a bike that sat unloved in a barn for 15 years to start up.

There is no screw holding the points plate on because I removed it. I can assure you that this engine is not sitting on it's side in my garage. I also don't think that I purchased the wrong points, as I have purchased them from two different companies. That being said, stranger things have happened, but I find it unlikely that two local "Honda experts" would provide me with identical looking points that are incorrect. But I am not an expert, the bike didn't have points in it when I got it, so I don't know what correct ones are supposed to look like.

So far I have had 1 Daiichi point break, and 1 F.E.W. point break. I was told FEW was a decent brand, and the packaging clearly says CB350F on it, so I doubt I was sold the wrong points.

Spanner 1 · « **Reply #44 on:** May 15, 2012, 09:05:14 AM »

OP, please look at your broken points set vs. the picture of the 'new' points. See how much fatter the pin on your points is compared to the new ones ?....... the pin locates in a hole in the main plate, What's the set-up with the broken one, is it located in the main plate as it should be ?

madmtnmotors · « **Reply #45 on:** May 15, 2012, 09:16:41 AM »

G.G.,
You're on the right track. The issue you are having is quite odd, I don't think I've ever seen or heard of it before, especially from two different brands. Unless one brand is outsourced to the manufacturer of the other. Still, a somewhat unique problem (based on my limited experience). If you've brought it back to life then you've done well, keep replacing those points until you find a manufacturer's part that doesn't break and stick with those.

Try not to take forum postings too seriously. I had to look VERY hard and VERY closely to be able to refute his observation, looks like an honest mistake. Often times when someone asks a question there are important details left out that can make it difficult and frustrating to try and provide a meaningful response. Just sayin...

It's also difficult to to inject the proper "just yankin your chain" tone into a forum post. We are just a loosly knit bunch of bikers after all...

Spanner 1 · « **Reply #46 on:** May 15, 2012, 09:32:04 AM »

Nice post MMM... it's very difficult to have any 'nuance' when just typing words here

Green Goblin · « **Reply #47 on:** May 15, 2012, 10:05:54 AM »

Ya I guess I shouldn't get my panties in a bunch, it's just the internet!

Spanner 1 · « **Reply #48 on:** May 15, 2012, 10:18:32 AM »

Or get your knickers in a knot

.... any update on my last Q

bollingball · « **Reply #49 on:** May 15, 2012, 11:00:34 AM »

Green With all do respect I was a little put off with the post you put up Title was DELETE I still don't know what that was all about. Anyway back on topic Here is a pic. of a new set of points that I think are the same side as your pic. This set is laying on a desk but I tried to line them up on the same angle as yours. If you look close you will see TEC above the spring. Idont know any thing about FEW points.
Here is the pat # for the points of my pic. Hope this may help
30203-300-154

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Author Topic: Why Are my Points Breaking/Snapping?? (Read 8650 times)

bollingball

bollingball