Ok, I am reopening this thread so people can have fun laughing at me as I try to rebuild my 305!
The biggest mechanic project to date for me is pulling the engine and changing the advance springs (with the sprocket still on).
This should be an adventure!
The engine is out. Tomorrow I crack her open and will post pictures.
The Superhawk from hell...Ok, I am clearly in over my head.
Engine out and lid is off:  CB77 rebuild 001 by Jrlovvorn, on Flickr  CB77 rebuild 003 by Jrlovvorn, on Flickr Found the link and packed off the engine, used zip ties to hold the chain:  CB77 rebuild 007 by Jrlovvorn, on Flickr Got the bugger off and chain is secure:  CB77 rebuild 009 by Jrlovvorn, on Flickr With one good tap with a rubber mallet on the chain tensioner housing, the head is off!  CB77 rebuild 012 by Jrlovvorn, on Flickr  CB77 rebuild 015 by Jrlovvorn, on Flickr Another tap and the next piece is off:  CB77 rebuild 023 by Jrlovvorn, on Flickr Fresh green o-ring - someone has been in here before:  CB77 rebuild 018 by Jrlovvorn, on Flickr I think this means these are standard pistons:  CB77 rebuild 027 by Jrlovvorn, on Flickr Pistons out:  CB77 rebuild 032 by Jrlovvorn, on Flickr This looks scary - hope I dont have to go down to the bottom end -  CB77 rebuild 030 by Jrlovvorn, on Flickr A looks at the pistons - the rings dont look broken or anything - no obvious sign of why all the smoke, but maybe someone will spot something:  CB77 rebuild 034 by Jrlovvorn, on Flickr  CB77 rebuild 035 by Jrlovvorn, on Flickr  CB77 rebuild 039 by Jrlovvorn, on Flickr  CB77 rebuild 043 by Jrlovvorn, on Flickr Next to measure the bores. Anyone have a reccomendation for a bore gauge? Also, anyone know what the spec should be? I looked at this as a method to measure. Anyone think this dude is wrong? http://www.youtube.com/watch?v=iYpzeVNcEG4 video looks methodical enough to me.
ive seen most work on bores done with a micrometer (instead of the digital calipers) and a dial bore gauge. its a little foggy, but i think this is how it was done. basically, you set the micrometer to the tolerance of the bore. lets say its still at the stock 60mm. you then insert the dial bore gauge into the micrometer gap and zero it out at exactly 60mm. then, you insert the dial bore gauge into the bore to measure 60mm plus whatever the wear has been. if its past the tolerance it would be time to move up to 60.25. measure perpendicular to ensure that it is also not out of round. bore sizes increment at .25 intervals from 60 also i was browsing a bit, and as of 11.3.12 this is on ebay. a NOS cam sprocket/advance. if you wanna just replace the whole friggin assembly. http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... ink:top:en good luck with the top end! ill be joining you shortly! -dave Thanks a ton!
Looks like I am going to ship the head to LM in TX, so that part is covered. And I have a spare advancer from a very nice friend on the forum I might put in (even though I think I finally got those springs set right). I think I will just find a local shop to bore it out to a larger size, and then I don't have to mess with any measurements, and risk getting them wrong. Anyone have advice or thoughts on going up to .25, or 1.0, or even 350 big bore? What kind of performance increase would going up a size or two give me? Also, if anyone knows of a good shop in DC, MD, or VA to do the machine work, please let me know. This is the fun part! I think getting it back together will be a little more challenging.
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