So over the weekend I had my girlfriend look at an older Kuwahara road bike for me that I found on CL in a neighboring city. Knowing I wanted to attempt to build up a Fixie she went ahead and just bought it for me because shes a pretty awesome lady. I am super happy with the bike, it runs great, looks sexy with extremely little rust, basically just need to give it a good clean and maybe some new cables and she should absically be good to go i beleive. But now that iv begun researching into the conversion I am kind of unsure about some things. One of my bigger concerned is with the crank set. I believe this is a cottered crank? IT appears there is some kind of cap on it that i have yet to remove but underneath it looks like theres a pin in place. From reading i'v found this can be a bit of a hassle to work with, thats okay i have all winter to dick around with this thing so a little more work isnt to much of an issue (I am pretty new to all this stuff too.. the only mech stuff iv done is pretty basic repairs on my rockhopper.) I cant seem to find this crankset anywhere either, appears its a Singuno from 1985 (same year as the bike) and to me it looks like all the crank teeth wheel things (sorry im not 100% sure of the name for these things) are attached to the larger outer casing deal. I guess my question is can remove the outer casing and just buy new "teeth wheel things" or am i going to have to buy a whole new crank set (apparently a new BB seems to go along with these purchases?) Any help would be great, as i mentioned before im no seasoned bike mechanic and would also prefer to not have to spend a crap ton of money on a new crank set.. They look rather pricey. Also most everything on the bike seems to be original, which i think is kind of cool and would be cool to keep as much as possible.
^^Sorry for such a massive paragraph too