Do an EBAY search for:
"Z50, CT70, C70, XR70 cam chain"
This one is made in Thailand but others I see in California.
http://cgi.ebay.com/ebaymotors/HONDA-AT ... ccessories
Check it out, maybe we can use these as is or modify them.
Lyle
--- In
2cylinderhondas@yahoogroups.com
, wrote:
> Kev;
> The cam sprocket is steel, so is the crank shaft sprocket.
> Manufacturers look for the most cost efficient way of mass- production (best
> bang for the buck). The rubber tensioner allows for tension on the chain
> with very little in the way of precision. A sprocket would need more
> stability than the arm that is used at present. I doubt there is much noise
> difference although the button at the bottom of the crank shaft bearing cap,
> shows that with time the roller was not doing it's job as the chain slapped
> against many of them. Now that is a sound I would like to get a recording
> of.
> Just a thought.
> Bill
> -----Original Message-----
> From:
2cylinderhondas@yahoogroups.com
> [mailto:
2cylinderhondas@yahoogroups.com
]On Behalf Of lyletrudell
> Sent: Tuesday, June 29, 2010 8:12 PM
> To:
2cylinderhondas@yahoogroups.com
> Subject: [2cylinderhondas] Re: New chain tensioner rollers
> Kevin, I think a steel idler sprocket with a good bearing would be the
> best....as Bill suggested. Most high load/rpm systems use a sprocket as an
> idler.
> Think about this, the chain would match the idler sprocket perfect and not
> just rub/slide against the rollers on the chain causing wear.
> Note that the chain sprockets look good after 38 years, the only thing
> worn out is the plastic/rubber rollers.
> It would be no more noisy than the other stock steel sprockets.
> I have read that a well oiled chain system is the most efficient way to
> transfer power.
> Don't take my word for it, do some research, were still in the design
> stage.
> Always looking for a better way to do things.
> Lyle
> --- In
2cylinderhondas@yahoogroups.com
, Kevin Lister
> wrote:
> > Wouldn't steel be really noisy and put more wear on the chain?
> > There must be a reason for making the part out of something that is
> durable but not as hard as steel.
> > Any thoughts?
> > kev
> > --- On Tue, 6/29/10, lyletrudell wrote:
> > From: lyletrudell
> > Subject: [2cylinderhondas] Re: New chain tensioner rollers
> > To:
2cylinderhondas@yahoogroups.com
> > Date: Tuesday, June 29, 2010, 3:49 PM
> > �
> > Good Ideas!
> > I machine a lot of Delrin parts, but agree Delrin it's not a good
> material for high heat and high load.
> > Was talking with Miles about PEEK or Nylon 6 with MDS.
> > Do a search about properties and see what you think.
> > Bill was talking about using a small steel sprocket with the same pitch
> as the chain...clever.
> > Jerry, your idea is always a good way, modify an existing part!
> > Cheap and it's already used for that purpose on other motorcycles.
> > Can you get some specs on it?
> > Thanks
> > Lyle
> > --- In
2cylinderhondas@yahoogroups.com
, Jerry wrote:
> > > I've only seen pictures but honda part#14670-035-030 looks about the
> same size gear wheel but with threaded center. Candidate for possible
> modification to drill out and install bearing into it. They are pretty
> common honda motorcycle part so don't see them disappearing anytime soon.
> > > -----Original Message-----
> > > From: CHEYENNE FLETCHER
> > > Sent: Tuesday, June 29, 2010 8:57 AM
> > > To:
2cylinderhondas@yahoogroups.com
> > > Subject: Re: [2cylinderhondas] Re: New chain tensioner rollers
> > > Interesting. We have use it in high temp situations and it never
> fails. Look like someone tries it and failed. What if you made a billet
> wheel with a Delrin outer??
> > > ----- Original Message -----
> > > From: feltonminicycle
> > > To:
2cylinderhondas@yahoogroups.com
> > > Sent: Monday, June 28, 2010 11:03 PM
> > > Subject: [2cylinderhondas] Re: New chain tensioner rollers
> > > Delrin is not a good choice for engine rollers. Do not use it. I have
> proof - a delrin roller with the center melted out of it the size of a
> nickel. The sides of the roller look like it was in a fire. I took it out of
> an engine I was rebuilding.
> > > Delrin works for a lot of things, just not being inside an air cooled
> engine.
> > > Watch my video on You Tube around 1:42 into the vid, you will see it.
> > > Miles
> > > --- In
> > > [The entire original message is not included]