Charles,
My 70 had 14-41 original sprockets (changed to 17-36 for low rpm, deeper sound and longer engine life). Yours is 14-36? That means that your rpm is slower than factory, hence less power.
Ali
--- In Honda-C70@yahoogroups.com, Charles Schlosshan <cayman2653@...> wrote:
>
> Baby Huey,
> Recounted the front sproket and it is a 14 tooth, rear is 36 tooth. It's 96 here already and on the way to 102 later this afternoon. Took a little ride to cool off after the count and ran it up to 35mph. Steady and smooth, if it makes it to 40-45 the road will have to be fairly long. About another 25 miles and I will open it up and see. Forgot to try the old spark plug,actually only about a month old. Try it tomorrow in the morning cool.
>
> From: Charles Schlosshan <cayman2653@...>
> To: "Honda-C70@yahoogroups.com" <Honda-C70@yahoogroups.com>
> Sent: Sunday, July 31, 2011 9:50 AM
> Subject: Re: [Honda-C70] Re: Top Speed Issue
>
>
> Â
>
> Thanks Baby Huey,
> I am going out now and recount the front sproket and also the rear. A new off brand plug came with the Beatrice Head and I don't know if it is a resistor or not. The spark plug cap and most of the plug wire are new and non resistor. I will put one of my other plugs in and see if that changes anything. I have not tried for top speed yet; have ran about 15 miles on the new rings and want to wait until I have rode 50 miles before I open it up. Just from feel I don't think it will go any faster then before :(. It has more torque then it did but rev's up a lot slower. Goes up to 30 mph but just slows down after that.
> At least one new sproket may be in order, Thanks For Your Help! Charlie
>
> From: myron andrews <mvandrews13@...>
> To: honda-c70@yahoogroups.com
> Sent: Sunday, July 31, 2011 9:25 AM
> Subject: RE: [Honda-C70] Re: Top Speed Issue
>
> Is your new plug a resister plug & the spark plug cap a resister? You can only have 1 resistor not both . Stock gearing is 14 front & 36 rear . A 15 front is geared high for lower RPM`s at any speed , but lower RPM`s makes less power. Good Luck ! Baby Huey
>
> To: Honda-C70@yahoogroups.com
> From: cayman2653@...
> Date: Sat, 30 Jul 2011 10:55:25 -0700
> 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".Â
> 3. New spark plug installed and gapped to 0.025".
> 4. Ignition timing set after points were gapped to the F mark via the static method.Â
> 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.
>
> 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 and very slow with no
> hesitation or bogging when accellerating. It does not accellerate as fast as it did before.
>
> Question: How many miles should I wait before checking top speed? What could be causing the slower accelleration?
>
> From: John <nebraska650@...>
> To: Honda-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 Honda-C70@yahoogroups.com, "A" <ak6666666@> 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 Honda-C70@yahoogroups.com, "A" <ak6666666@> wrote:
> > >
> > > I want to add that fresh air should hit engine to keep it cool.
> > >
> > > --- In Honda-C70@yahoogroups.com, "A" <ak6666666@> 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 Honda-C70@yahoogroups.com, "cayman2653" <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]
>
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
>
> [Non-text portions of this message have been removed]
>
> ------------------------------------
>
> C70 Passport Not Running Right?
> 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.htmlYahoo! Groups Links
>
> [Non-text portions of this message have been removed]
>
>
>
>
> [Non-text portions of this message have been removed]
>
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