Here's the article I read and believe:
http://www.mototuneusa.com/break_in_secrets.htm
(imagine a cute or dirty tagline here)
On Fri 05/08/11 12:12 PM , Charles Schlosshan cayman2653@yahoo.com sent:
> Thanks for the breaking in advice. I will do the accelleration and
> coasting and see how it does.
>
> From: "gandalf@son
> ic.net" ic.net>To: Hon
> da-C70@yahoogroups.comSent: Friday, August 5, 2011 2:09 PM
> Subject: Re: [Honda-C70] Re: Top Speed Issue
>
>
>
>
> I actually believe that engines that are stressed during break in will
> perform better and last longer than otherwise. The best is to break it in
> on a dyno machine. The first hundred miles are critical and you want hard
> acceleration alternated with coasting. Country road is probably the best
> idea. The stress wears in the rings creating a solid seal. Without the
> stress the rings may never properly seal. Most motorcycle manufactures run
> each bike at top speed for several minutes as one of the last steps off the
> assembly line.
> Apparently the whole breaking in gently thing is all about lawyers and not
> driving a vehicle your not used very hard.
> (imagine a cute or dirty tagline here)
>
> On Fri 05/08/11 8:00 AM , Charles Schlosshan cayman26
> 53@yahoo.com sent:> Hi A,
> > I most certainly will. I have about 40
> miles on the new piston/rings> and head now and will wait until about 100 miles
> before I open it up. > Honda says to break it in for 600 miles but I
> may never ride it that> much. The traffic is so bad here in Myrtle
> Beach with all the> vacationers that it is dangerous to go out with
> a small bike. It is> best to ride something with enough horse power
> to pull away from> traffic. My riding is mostly around the
> neighbor hood with short> rides to Walmart and the gas station when
> traffic is low. The bike> does have more torque, by seat of the pants
> feel, then it did before. > I can come to a full stop from 30mph and it
> immediately comes to a slow> smooth idle. I did run it up to 35mph once
> and it felt like it will> easily run faster but I will wait a bit more
> before trying. I am> satisfied with the repairs so far. There
> was a fellow who was having trouble with the dratv quick fix
> head> yesterday, I was away from my computer and can't
> reply to the forum site> from my phone. Anyway he said there was
> tapping from the head and the> head was getting hot. The quick fix head
> comes assembled but none of> the bolts are tight nor are the valve tappets
> adjusted. I wonder if> he did that before running the engine. The
> head requires its own> piston, comes with it, also. Just a
> thought before he buys another> head. I have an original Honda C70 head
> that could be fixed. > The local Honda shop wanted more to fix it then
> the quick fix head> costs.Take care A and thanks for your help; will
> post and update soon.>
> > From: A 66@yahoo.co.uk
> >To: Hon> da
> -C70@yahoogroups.comSent: Friday, August 5, 2011 2:39 AM> Subject: [Honda-C70] Re: Top Speed
> Issue>
> >
> >
> >
> > Charles, do let us know when all problems are
> solved.>
> > --- In Hon
> > da-C70
> @yahoogroups.com, Chris Bader wrote:>> > Hi Charles,
> > >
> > > Yikes, it boggles the mind how simple
> oil> changes are not routine for everyone.>
> > >
> > > I know what you mean about the chain case
> being> difficult when damaged - last summer my swingarm
> front bolt came loose and> it resulted in a mangled chain
> case. Trying to put on a new> chain case a couple of months ago just did not
> work and I found that it had> a broken off the lower bolt mounting
> tab. I'm going to replace> the swingarm so the chain case can be used
> again.> > >
> > > It's great to hear that your new engine
> runs so> well!>
> > >
> > > Thanks,
> > >
> > > Chris
> > >
> > >
> > >
> > > ________________________________
> > > From: Charles Schlosshan
> > > To: "Hon
> > da-C70
> @yahoogroups.com" da-C70
> @yahoogroups.com>> Sent: Sunday, July 31, 2011 6:38 AM> > Subject: Re: [Honda-C70] Re: Top
> Speed> Issue>
> > >
> > > Â
> > > Hi Chris,
> > > To answer your questions, I rebuilt the
> lower> end because the engine oil had burnt onto the
> insides of the cases, gears,> oil screen, et al from the engine over heating
> in the past. I> found the problem when I tried to drain the
> engine oil for a oil change> right after we got the bike. I
> don't think the previous owner> had ever changed the oil. No oil
> would come out of the drain> hole at all. I know there was oil
> in the engine because it was> very black on the dip stick.Â
> Removed the left side cover and> found the oil screen and its cavity completely
> full on crystalized oil in> flat sheets and nuggets both. This
> was part of the problem> with the engine over heating plus rust in the
> fuel system and numerous air> leaks in the carb and intake. The
> oil was burnt on the cases> so bad it took over 5 hours to clean them after
> I got the engine> apart. Believe me there were plenty
> of bad words spoken that> day along with a few for the idiotwho invented
> the> > super soft phillips head screws
> Honda> loves. Most were replaced with
> socket head cap screws during> reassembly. As for the chain guard,
> I have had it off a few> times in the last few months and seem to have
> trouble getting it lined up> right with the bottom half. It got
> a little bent when the> chain broke and that makes it a little harder
> then normal to fit back> together. Just for future info, its
> four bolts and the left> side shock absorber bolt that have to come out
> to remove the top> half.> We did not have the bike new, my wifes
> uncle> bought it new and rode it with no maintenace
> until it would not run any> more. She got it when her uncle
> passed away and it set for 10> years before I came along and decided to make it
> run again. > Making it run was easy, making it run right is
> not. The engine> is running very smooth and steady now, sounds
> like a new sewing machine> running at 30 mph. Have not tried
> to go faster yet, want to> put a few more miles on it before I try WOT
> again. The new> head came with a new piston and a note saying
> the valves will only clear> with this piston and no other. I
> will put another 40 miles or> so on it then try for top speed.Â
> The exhaust valve was bent on> the old head from down shifting once a little to
> soon. New> head was cheaper then having the old one
> machined and parts> replaced. Baby Huey lead me in path
> to finding the bent valve> and how to ckeck it off the engine.Â
> Just looking atthe valve it appeared to> > be touching the valve seat all the way
> around> but it was not. Filling the head
> with water, spark plug> installed, found the leak. There
> was a small dimple in the> piston also upon close inspection.Â
> Live and learn I> guess. Make sure the speedo is down
> to the second gear range> before you down shift.> Thanks for your
> response,> > Charlie
> > >
> > > From: Chris Bader
> > > To: "Hon
> > da-C70
> @yahoogroups.com" da-C70
> @yahoogroups.com>> Sent: Saturday, July 30, 2011 5:43
> PM> > Subject: Re: [Honda-C70] Re: Top
> Speed> Issue>
> > > Â
> > >
> > > Hi Charles,
> > >
> > > I will not even guess as to why you are
> having> this issue as there are many more qualified
> experts in the group to give> advice.>
> > > One item I don't remember you letting us
> know is> why you did the lower end rebuild and did you
> have the passport prior to> rebuild with better top end speed on original
> engine? By the> way, you mentioned that the chain guard is not
> your favorite item, does> that mean you have not taken that off to
> inspect? I'd much> rather remove 4 bolts on the chain guard than
> does a piston rebuild in> terms of mechanical complexity.>
> > > It's kind of off-subject but it circles
> around> to the passport, this wonderful group as a
> resource and a major> rebuild.>
> > > I've done a fairly substantial amount of
> work on> my 98' Subaru Outback in the past year because
> of an overheating> issue.> Originally thought it was a water
> pump and so I> flew my mechanic friends from Houston up here
> last year. We> changed timing belt,> water pump, and
> replaced heater core because it> went out sitting in driveway. Ran
> fine after that but still> overheated. Found out it could only
> be> head gaskets so had heads rebuilt, changed> gaskets and put it back together and could not
> get it to> start. Might be off a
> tooth? Compression reads> fine. I have subsequently gone
> through/replaced entire fuel> supply system, coil, and everything else you
> could possibly> imagine. Then last winter it
> straight up would not turn over> after getting weaker by the day (dash lights
> eventually would not light> even with new battery. Replaced
> entire ignition system since,> no change. Today getting to last
> couple of items, replaced> starter relay and it FINALLY turned over after
> six or seven> months. Then nothing, seemed to sap
> the life out of the> battery. So I've obviously got some
> electrical> problem. I needed a win before
> finally deciding to tow it into> the dealer because this is beyond my tools and
> experience. (p.s. I'm not> looking for advice on my car, way beyond that in
> terms of my sanity after> all this time and effort : )>
> > > The point of my post is to say that I love
> my> passport because even with my limited mechanical
> experience it is fairly> straightforward> and I've rebuilt/replaced
> every part (besides my> wonderful reliable engine), gone through and
> traced every wire, tested> every electrical component, and
> connection. It is very> satisfying to have "wins" with my 30
> year old passport and even> with issues now and again (mostly my fault), I
> can handle them with the> advice of our group. I signed up
> for a similar yahoo group for> my Subaru and that was a bust, 2 reply's was all
> I received in last> year.>
> > > This group has a wealth of information
> and> everyone is so helpful so I'm sure that with
> more details and> troubleshooting you >
> > > will get your issue sorted out.
> > >
> > > Thanks again to everyone in the group,
> look> forward to riding my passport next week after
> getting the tube replaced on> my >
> > > flat tire. Back in
> > business!>
> > > Chris
> > >
> > > ________________________________
> > > From: Charles Schlosshan
> > > To: "Hon
> > da-C70
> @yahoogroups.com" da-C70
> @yahoogroups.com>> Sent: Saturday, July 30, 2011 10:55> AM> Subject: Re: [Honda-C70] Re: Top
> Speed> Issue>
> > > Â
> > > John, A, Mike, Myron and a score of others
> how> offered help with my Top Speed
> Issue. I have installed the new> head and the new piston/rings that came with it
> and the new> muffler. Muffler really looks good
> compared to the rusty one> it replaced and I can feel exhaust coming out at
> idle> now. >  Here is the
> set up data:> > 1. Cam timing set on the T
> mark> with the O on the cam aligned with the mark on
> the head.> 2. New points and condenser installed; point gap> is 0.012".  >
> 3. New spark plug installed and> gapped to 0.025". > 4.Â
> Ignition timing set after points> were gapped to the F mark via the static
> method. > 5. Throttle cable adjusted to
> 5mm> free play as best I could tell. >
> 6. Valve tappets set to 0.002"> clearance.> 7. Rear tire
> inflated to 40psi;> front to 35psi.> Â
> > > First ride; bike was a little hard to start
> but> ran fine after carb filled up with
> gas. Leg shield was not> installed but air cleaner (new) was in place and
> secured with one> nut. Bike over heated in about 2
> miles. Limped> home and let the bike cool. Checked
> oil level and it was just> a little below full mark; added oil until it was
> full. > Installed leg shield and cover for air cleaner
> and let the bike cool> down. Rode again for about 10 miles
> with no over> heating. The engine feels like it
> has a lot more torque but> does not rev up as fast as it used
> to. I did not attempt to> run at top speed being the piston and rings are
> new. The bike> will run right up to 30mph but it sounds like it
> is really running> fast. Removing the chain guard is
> my least favorite chore but> I will do it tomorrow morning and count the
> teeth on the rear sproket;> front sproket is a 15 tooth. Coming
> to stop signs the engine> will idle smoothly andvery slow with
> no> > hesitation or bogging when
> > accellerating. It does not
> accellerate as fast as it did> before.> Â
> > > Question:Â How many miles
> should I> wait before checking top
> speed?  What could be> causing the slower accelleration?>
> > > From: John
> > > To: Hon
> > da-C70
> @yahoogroups.com> Sent: Wednesday, July 27, 2011 5:34> PM> Subject: [Honda-C70] Re: Top
> Speed> Issue>
> > > Â
> > >
> > > Charles,
> > >
> > > I believe I remember you checking
> your> countershaft sprocket size, and it was stock;
> but I don't remember seeing> mention of the tooth count on the rear of your
> Passport? Perhaps the PO had> some steep hills in their area and went a little
> taller to compensate, or> did a little trail riding as well?>
> > > You're going to have a well sorted bike
> when you> lick this problem. Keep at it!>
> > > (Good viibes being sent in your
> general> direction.)>
> > > John H.
> > > Omaha
> > >
> > > --- In Hon
> > da-C70
> @yahoogroups.com, "A" > wrote:> >
> > > > Two more thing came to
> mind.> > > Throttle should not have more than 5mm
> play> at grip flange.> > Clutch should fully
> engage and not slip. At> no point in the past should the bike have been
> subjected to EC slippery> oils.> >
> > > > --- In Hon
> > da-C70
> @yahoogroups.com, "A" > wrote:> > >
> > > > > I want to add that fresh air
> should> hit engine to keep it cool.> > >
> > > > > --- In Hon
> > da-C70
> @yahoogroups.com, "A" > wrote:> > > >
> > > > > > My two cents:
> > > > > >
> > > > > > Full tire
> pressure.> > > > > Not thick engine oil.
> Functioning> oil pump.> > > > Brakes and chain
> adjusted and> proper sprockets.> > > > Good
> petrol.> > > > > Clean air filter
> and> carb.> > > > Good tuning.
> > > > > > Smooth level
> road.> > > > > No head wind.
> > > > > > Tight sitting
> posture.> > > > > Removing anything which adds
> air> drag.> > > >
> > > > > > These should increase
> speed.> > > > >
> > > > > >
> > > > > > --- In Hon
> > da-C70
> @yahoogroups.com, "cayman2653" > wrote:> > > > >
> > > > > > > I am about to loose my
> mind> trying to solve this problem and need some help.
> My bike has a new piston,> rings, cylinder, carb, clutch, cam chain and
> most tensioner parts and it> runs good at low speed. The carb is adjusted so
> there is no bogging at all> and the idle is very slow and smooth. The cam
> timing is right, the> ignition timing is slightly advanced ( it seems
> to run better like this> )from the F mark and the point gap is correct.
> The valve clearance is set> at 0.002in per the manuel. The bike feels like
> it has power in first and> second gears and will accellerate to the shift
> marks on the speedometer. > In third gear it runs right up to 32-35 mph and
> will go no higher. I have> played with the timing until I am blue in the
> face and nothing seems to> make much difference in the performance. When
> the new carb was installed I> removed the fuel tank and cleaned it out good,
> replaced the fuel lines and> adjusted the carb. Rechecked the carb for>
> main jet size yesterday. I could not find any> numbers on the jet so I installed the stock
> Honda carbs main jet. This did> seem to make the power level feel stronger but
> did not help the top speed> any. Also checked the slide to confirm it does
> open all the way and the> needle is set in the middle slot. Float level
> was checked and found to be> about 1/8" low; reset to Honda spec's. Does
> anyone have a guess what> could be the problem?> > > >
> >> > > > >
> > > > >
> > > >
> > >
> > > [Non-text portions of this message have
> been> removed]>
> > > [Non-text portions of this message have
> been> removed]>
> > > [Non-text portions of this message have
> been> removed]>
> > >
> > >
> > >
> > > [Non-text portions of this message have
> been> removed]>
> >
> >
> >
> >
> > [Non-text portions of this message have been
> removed]>
> >
> >
> > ------------------------------------
> >
> > C70 Passport Not Running Right?
> > 1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw1970-73 C70 Troubleshooting
> Guide: > http://tinyurl.com/6ebwtw (scroll to sec.7.1
> page> 101.jpg)1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c1980-81 C70 Troubleshooting
> Guide: > http://tinyurl.com/hu42c (scroll to sec.18-1
> page> 170.jpg)1982-83 C70 Troubleshooting Guide:
> > http://tinyurl.com/hu42c (scroll to sec. 20-28
> page> 205.jpg)
> > 1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn61982-83 C70 Maintenance
> Schedule: http://tinyurl.com/hw35c> More resources for C70 Passports and
> Cubs:> http://www.shlaes.com/Vehicles/Scooter.htmhttp://www.velodrome.
> com/HondaC70/HondaC70.htmlYahoo! Groups Links> To visit your group on the web, go
> to:> http://groups.yahoo.com/group/Honda-C70/> Your email settings:
> > Individual Email | Traditional
> >
> > To change settings online go to:
> > http://groups.yahoo.com/group/Honda-C70/join(Yahoo!
> ID required)>
> > To change settings via email:
> > Honda-C70-digest@yahoogroups.com Honda-C70-fullfeatured@yahoogroups.com> To unsubscribe from this group, send an email
> to:> Honda-C70-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject
> to:> http://docs.yahoo.com/info/terms/>
> >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> C70 Passport Not Running Right?
> 1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw1970-73 C70 Troubleshooting Guide:
> http://tinyurl.com/6ebwtw (scroll to sec.7.1 page
> 101.jpg)1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c1980-81 C70 Troubleshooting Guide:
> http://tinyurl.com/hu42c (scroll to sec.18-1 page
> 170.jpg)1982-83 C70 Troubleshooting Guide:
> http://tinyurl.com/hu42c (scroll to sec. 20-28 page
> 205.jpg)
> 1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn61982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c
> More resources for C70 Passports and Cubs:
> http://www.shlaes.com/Vehicles/Scooter.htmhttp://www.velodrome.com/HondaC70/HondaC70.htmlYahoo! Groups Links
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/Honda-C70/
> Your email settings:
> Individual Email | Traditional
>
> To change settings online go to:
> http://groups.yahoo.com/group/Honda-C70/join(Yahoo! ID required)
>
> To change settings via email:
> Honda-C70-digest@yahoogroups.com Honda-C70-fullfeatured@yahoogroups.com
> To unsubscribe from this group, send an email to:
> Honda-C70-unsubscribe@yahoogroups.com
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
>
1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
1970-73 C70 Troubleshooting Guide:
http://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
1982-83 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)
1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c
More resources for C70 Passports and Cubs:
http://www.shlaes.com/Vehicles/Scooter.htm
http://www.velodrome.com/HondaC70/HondaC70.html
No comments:
Post a Comment