Primary chain tensioner question

e3steve · Post by **e3steve** » Mon Nov 17, 2008 2:51 pm

Guys, I have a '64 CB77 motor, 102XXX which, according to Bill Silver's manuals/history, shouldn't have a primary chain tensioner. However, it does. Bill's historic data states, quote "The primary chain tensioner was not introduced until CB72E-211581, CB77E-210701.".

Anyone else out there in Honda-looney-la-la-land come across this?

Rgds,

Steve

LOUD MOUSE · Post by **LOUD MOUSE** » Mon Nov 17, 2008 3:43 pm

Figuring it's a 1964 bike I'd expect to find one!. ..................lm

e3steve wrote:Guys, I have a '64 CB77 motor, 102XXX which, according to Bill Silver's manuals/history, shouldn't have a primary chain tensioner. However, it does. Bill's historic data states, quote "The primary chain tensioner was not introduced until CB72E-211581, CB77E-210701.".

Anyone else out there in Honda-looney-la-la-land come across this?

Rgds,

Steve

e3steve · Post by **e3steve** » Mon Nov 17, 2008 3:57 pm

Thanks Ed. The bike's a mutt, but the motor nr carbon-dates the mill to '64.

68Cb77 · Post by **68Cb77** » Mon Nov 17, 2008 9:28 pm

hey, considering everything I've read..I'd be happy to find one on the bike! sounds like all those chains stretched. And I guess no one's made a new one yet..love to know one was available.

e3steve · Post by **e3steve** » Tue Nov 18, 2008 3:27 am

Abso-bloody-lutely! I was ecstatic when I peered in through the filter cover and found one. Also a bit mystified that I don't have a filter bearing washer, though. I reckon it's in the casing from the last time I pulled the filter, having probably been put in the inside of the filter before my tenure. Luckily no filter/cover damage, though.

PS: got a NOS replacement from Big Bob (bwhite50) on eBay; $49.95 BiN.

68Cb77 · Post by **68Cb77** » Tue Nov 18, 2008 8:52 am

A primary chain? I thought was were none left, unless you found a good used motor. I noticed that mine seemed to have some funny looking wear on the sides of the chain. Almost like somebody had filed a rivet to separate the chain....but on a few different links.....I kinda held my breath and threw the cover back on. I wonder why that chain seems a lot wider than the sprockets?

e3steve · Post by **e3steve** » Tue Nov 18, 2008 11:56 am

Tensioner, 68-mate, tensioner! I don't think I'd be riding anywhere without the chain..... You shouldn't have a problem having one made at a decent m/c shop; count the links of your existing chain and take one of the primary drive sprockets along for pitch & guage.

Some clarification surrounding my opening post:

Engine nos! I've re-read the Honda numbering lesson; and the fact that the tensioner wasn't introduced until a CB72/CB77-21XXXX engine nr which, I now remember, was 1962. Being sometimes a bit bloody dumb, I wrongly thought that my motor, at 102XXX, preceded that issue.

1961 - 11XXXX
1962 - 21XXXX
1963 - 31XXXX
1964 - 10XXXX, 40XXXX,
1965> 1000001 - 1056494

.

Honda305.com Forum

honda305.com Forum

Primary chain tensioner question

Primary chain tensioner question

Re: Primary chain tensioner question