Topic: school me on points

[Gman]

 

I need a life huh?

Yeah, I have some of those junk points.

tt

Funnily enough, I initially was referring to the other TT, but it applies equally.  Pretty much everybody beats me to the punch.   

And, FYI for those considering getting new points, no need to buy Daichii - there are Tec and ND points on eBay if you check now and again.  I just bought an NOS tune up kit of NipponDenso components (points, condensers, plugs) for $25 shipped.  My bike is fine at the moment, but I think at some point I'll get HondaMan's ignition; then I'll put on the new points and hopefully not have to mess with them again for a good long time, if ever.

http://rover.ebay.com/rover/0/e11400.m1842.l1120/7?euid=5575093b59fb4ea2b7848be3311d001b&loc=http%3A%2F%2Fcgi.ebay.com%2Febaymotors%2Fws%2FeBayISAPI.dll%3FViewItem%26item%3D370848593504%26ssPageName%3DADME%3AL%3AOC%3AUS%3A1120

Couldn't resist the old school packaging, either.   

[TwoTired]

When you work at a dealership or at home you will find out soon enough that all of the work you put into getting a set of used points contacts to look decent then after you install them and gap them and set them that you have weak spark.
Then you check the dwell and find out WHY the spark is weak.

This is total bull#$%* and unfounded conjecture.  Some here are more involved in developing a story than actually helping others.  I certainly hope the reader can tell the difference.

The dwell is a function of point gap and cam lobe profile.  The spark is a function of how well the coils have been charged and can't tell the difference between properly reconditioned points and new ones.

It is because the phenolic block that rubs against the points cam is worn down a few thousandths and only one of the sets of points can have the correct gap AND enough dwell and that the 2nd set of points cannot be brought into compliance.

I have over 20 years of reconditioning points, that easily proves the above is just another internet snow job and completely untrue.  Either that, or a testament to the ineptness that can be found at certain dealerships.

I'm very glad I was never subjected to the "excellence" of one particular dealership.

[toytuff]

Gman> got cha. Two Tired.

Senior moment. Again.

 

tt

[TwoTired]

what do these points files look like?

I did a google search for "contact points file".

http://www.northstatehc.com/store/index.php?crn=412&rn=2460&action=show_detail
http://www.northerntool.com/shop/tools/product_200396157_200396157

The key is to use an abrasive material that is harder than the point metal and is not sacrificial, meaning it doesn't shed bits of itself in the performance of removing irregular contact surface metal.

For the burnisher, I found this:
http://www.mcmelectronics.com/product/22-1235

Probably other electronic tool supply sources will sell them as well.

You may also me interested in this article:
http://www.cycleworld.com/2013/02/15/points-and-burnishing-files-tool-time/

You can use black carborundum sandpaper. Fine grit like #320

I urge the reader to examine the electrical and mechanical properties of Black carborundum before contaminating your point contacts.  You just may find your points need more frequent attention and/or replacement.

[andrewk]

And although the CB series 500-750 bikes are my favorite of all time Honda has discontinued all but a few items for these great bikes. Luckily their popularity gives a good after market and used parts supply.

You should talk to a Honda dealer.  You can get most any maintenance item, and although there are some things that Honda doesn't make anymore, the number of OEM parts available for these things dwarfs that of 35 year old Outdoor Power equipment.  Some people seem to think that Honda doesn't make any parts for these things anymore, but that's just not true.

actually...I am a honda dealer...but a honda outdoor power equipment dealer.  Quite a few of the honda filters, gaskets, seals, o-rigs and carb parts I can order directly since they are used in an outdoor power equipment or generator applications, if the OEM part number comes up i my system I get the part for dealer cost .   

I thought that might be the case-  I'm not sure if the OPE line and the Moto line coincide in partsmart (or whatever system you use) but you can get most things right from Honda.  You can cross reference your system with servicehonda.com.   It's really quite astonishing how much is available for these old bikes.  I just refreshed a 750K engine with all Honda parts- I don't think you can do that with many other makes.

[andrewk]

Am I the only one here that can get a bike running on Daiichi points?...they do sometimes require more fiddling to get timed...so it might take me 25 minutes as opposed to 10...

I can do it too.  It's just a pain in the ass.  And they don't last as long, since the geometry is fooked to begin with.  But, it can be done!