ca77 maintneance specs.

versuspop · Post by **versuspop** » Tue Apr 05, 2011 2:59 pm

ok.
in silver's manual that i have and in all documentation i have i can only find specs for the c77 0r c72. or 54mm pistons.
i am trying to prep info for the machinist. i need specs for CA77 in particular. here is an example of the info i need: see attachment

mike1969 · Post by **mike1969** » Tue Apr 05, 2011 4:13 pm

The A in CA77 just means it was made for the American market.

versuspop · Post by **versuspop** » Tue Apr 05, 2011 4:40 pm

yes. maybe i am not asking the right questions.

for example: spec for my piston dia. is 60mm.
this chart has it listed as max value at 54mm. i believe this is for a 250.

i am looking for this info for a 65 ca77, or for the appropriate info to take to a machine shop so that they can diagnose the condition of my cylinders, sot that i can decide if i need to just have them honed, or if i need to bore them out to the next size.

i have never done this kind of thing before. my friend who recommended the shop said i should bring engine specs including over size incriminates (which is one thing i do know).

mike1969 · Post by **mike1969** » Tue Apr 05, 2011 4:46 pm

I had my cylinders done last summer and 54.00 was for the 250cc and the 305 was 60.00.repair limit was 60.10 I took my repair manual to the shop with me so there were no mistakes.

versuspop · Post by **versuspop** » Tue Apr 05, 2011 5:44 pm

thanks. i found the information in my book -finally.

versuspop · Post by **versuspop** » Fri Apr 08, 2011 6:20 pm

So it looks like I am in the sh$$. I need my cylinders bored out and new pistons. I need to move up to .25 over. Tim McDowell sells a kit for $300. Is there a cheaper option? It seems like Ohio cycle sells pistons (266-020) for around 40 a piece though. It looks like I could save bout 100 if I piece a kit together. Is this a bad idea? Also, do I need to do anything to the head (valve area) if I get this job done?

Lastly, though i am sure I have seen info before, I can not find it now- what is the difference between ca and cb pistons?

joeweir1 · Post by **joeweir1** » Sat Apr 09, 2011 7:48 am

I'm surprised you can save $100.00.I was quoted a price close to $200.00 just to bore out my CA77 cyl.Why not just get the sleeves and kit and save the headaches of having it bored.As long as his sleeves are in spec. it should be easy to finish yourself.

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ca77 maintneance specs.

ca77 maintneance specs.

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