black betty


lathe lathe lathe
2010/06/08, 11:30pm
Filed under: clutch, head, variator, weight weenie

got to tony’s tonight and got the head and clutch bell done! i even got a couple pics of the action! not as many as i would have liked, but that’s usually the case, isn’t it?

the thing about lathe work is that it takes FOREVER to set up the part, and the cut usually only takes a couple minutes. the head took probably 45 min to get it perfect, which isn’t much time at all (the jack shaft took a couple hours), and maybe 10 min to make all the cuts.
i didn’t get any pictures of the actual lathing on the head, sorry about that.

if you’ll remember, i needed to take down the pulley cheek on the hobbit clutch bell to accommodate the wider belt. while we were at it, we changed the taper to 12.5 deg (stock was 15, i think) to push the belt up higher and to better match the derbi variator i’m using. but before even starting on that, tony skimmed 1mm off the outside of the clutch bell to lighten it up some. it also made the bell more round, which should cut back on vibration.
after doing that, he did the work to the pulley cheek.

tomorrow i’ll get some ‘after’ pictures of the head and clutch bell so that you guys can see what we did. the lighting’s not so good in tony’s shop so i didn’t do it tonight.
the bike should be back together tomorrow if i can find the time, so hopefully more videos of it in action sooooon! with full variation on both variators now, it should make for some impressive videos! i hope! we’ll see!


3 Comments so far
Leave a comment

oooooooooooooooh! hope this makes it 80-100% now

Comment by westseattleryan

do you have a 4-jaw chucked in a 3-jaw?

Comment by Jesse

yuup

Comment by terrydean




Leave a comment