Bangup : If you are uk & the guides at the bottom of the page are for north american models we may be comparing apples to oranges. We are blind as to what your bike is ,but it may be similar to what we have or not at all. There is a section on removing the head that will tell you to aligned the O on the cam chain with the O on the cam gear at TDC with both valves closed. If the 3 cam bolts don`t lineup with the bolt holes in the cam your chain is not timed correctly. I have pulled the head twice on my c70 but I put a stiff wire through the cam chain in 1 side out the other just above the cylinder so the chain couldn`t drop down & off the crank gear. But if you have a stuck piston & need to turn the crank , "pinning the chain " will not work for you. The cam cover is held on by a long bolt that goes through the center of the cam with the head of the bolt on the other side of the bike. Take the bolt out of the finned plate to remove the cam gear cover. I hope this is of some help . Baby Huey
> To: honda-c70@yahoogroups.com
> From: bangup1@live.co.uk
> Date: Sun, 24 Apr 2011 23:33:31 +0100
> Subject: RE: [Honda-C70] Re: Engine won't turn over
>
>
> There is no doubt that this is an OHC engine. I'm aware that OHV engines are easier to work on the top end but the question refers to an OVC engine therefore I'm wondering what is the relevance of checking frame nos etc.
>
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>
> To: Honda-C70@yahoogroups.com
> From: rdwnj@yahoo.com
> Date: Sun, 24 Apr 2011 13:37:26 +0000
> Subject: [Honda-C70] Re: Engine won't turn over
>
>
>
>
>
>
> Hello Bill,
>
> After all of this back & forth, what you & we need to know is what model 50cc Honda you have?
>
> So looking at the frame just above the engine on the left, or elsewhere, there should be a model number? If it is C or CA 100, 102, 105T, 110, 111,... it would be an OHV valve engine and you should see the shop manual here
> http://autos.groups.yahoo.com/group/classicpushrodhonda50s/files/Honda%2050-55%20Shop%20Manual/
> in the Yahoo classicpushrodhonda50s group. Any parts list would also show pictures of the parts which is helpful.
>
> If on the other hand, you have a C or S 50 65 70 etc. then you are in the right place! ANd we have shop manuals and parts list here too!
>
> The idea is that removing the head of an OHC engine is slightly more 'tricky' than removing the head of an OHV engine!
>
> Generally Hond aput the spark plug on the left on OHVs and on the right on OHCs :) At least on their 90cc singles!
>
> Pictures would help us too :) And whereabouts, generally on the planet are you and the motorcycle?
>
> Ron in NJ
>
> --- In Honda-C70@yahoogroups.com, "Bill" <bangup1@...> wrote:
> >
> > Can anyone help. I've recommissioning a Honda 50 that has been in a garage untouched for 19 years having done 15k when on the road. It is an automatic and the engine will not turn over using the kick start. I'm wondering if the piston has seized in the cylinder. How do I check for this and does it mean (if so)that a new top end is required? . If I need to take off the cylinder head is there any problem with the cam chain/timing when I put it back.Thanks for any help/suggestions
> >
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> [Non-text portions of this message have been removed]
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> ------------------------------------
>
> 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]
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
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