CA77 Rear Sprocket

Dogsbd · Post by **Dogsbd** » Thu Jul 31, 2008 8:51 pm

Should the rear sprocket on a CA77 be 27 teeth or 29?

Advantages of / disadvantages of / personal experiences with each?

Thanks!

Rookie305 · Post by **Rookie305** » Fri Aug 01, 2008 11:24 am

The rear sprocket on my CA77 has 29 teeth. I have no idea about the advantages and disadvantages between the two. Mine is still in pieces and has not been on the road yet.
-Ryan

Dogsbd · Post by **Dogsbd** » Fri Aug 01, 2008 3:19 pm

Mine is currently a 29 tooth as well and it also hasn't been on the road yet, ridden by me at least.

Mine is worn real bad and I've yet to find a good 29 tooth replacement, but I did run across a NOS 27 tooth which prompted my question.

I know 27 tooth would maybe lower my cruising revs but it would also make it tougher going up hill, I am wondering if it might be too much so.

davomoto · Post by **davomoto** » Fri Aug 01, 2008 4:47 pm

Sprocket specialties sell sprockets for the CAs, and you can get any number of teeth that you want. They are 520, not 525, so you'd need to change both sprockets and chain, which is a good idea anyway, or they will do custom sprockets for just a few bucks more. here's a link.

davomoto

http://www.sprocketspecialists.com/ProductSearch2.aspx

joeweir1 · Post by **joeweir1** » Mon Aug 04, 2008 8:16 pm

What about a sprocket from a ca72/250cc if you find one?I will have to check the but I think they are 30 or 31 teeth, but would have to look at one to be sure.

apolo1100 · Post by **apolo1100** » Tue Apr 28, 2015 6:31 pm

I have a 1962 CA72, 7,000 org. miles worn out rear sprocket..
I just when and look.. it has 31 rear and 15 in the front .
hope this can help.
Apolo1100

hotrodhendrix · Post by **hotrodhendrix** » Wed Apr 29, 2015 10:34 am

Post was 7 years ago but I am sure good info for others in the future. :)