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JSM parts going in, I went with the long, lightweight Carillo rods, the lightweight moly coated pistons, etc, etc. Rebalanced the crankshaft to 65% balance factor:[ATTACH=full]95166[/ATTACH]Getting the bottom end assembled took more time than I was expecting because of the set-up required for the JSM lifter blocks and lifters. Once I had the blocks clearanced for the lobes and had double checked that the lifters were adequately supported at 0 degrees lift, then I could get the bottom end together. I attempted to measure the width of the crank and the width of the crankcase so that I could put in whatever shims were required and thus avoid having to pull the bearings out over and over, but I failed. In the end I needed no shims at all for about 0.007" endfloat. [ATTACH=full]95167[/ATTACH] Tomorrow I attack the timing chest!!! Lots of opportunity to learn, I think. It seems to me that the timing chest is probably the most complicated part of a Norton engine build. It is certainly the most intimidating part to me. Just to make my life even more interesting, I'm going with a Hunt magneto, and this will be my first time setting one of those up.
JSM parts going in, I went with the long, lightweight Carillo rods, the lightweight moly coated pistons, etc, etc. Rebalanced the crankshaft to 65% balance factor:
[ATTACH=full]95166[/ATTACH]
Getting the bottom end assembled took more time than I was expecting because of the set-up required for the JSM lifter blocks and lifters. Once I had the blocks clearanced for the lobes and had double checked that the lifters were adequately supported at 0 degrees lift, then I could get the bottom end together. I attempted to measure the width of the crank and the width of the crankcase so that I could put in whatever shims were required and thus avoid having to pull the bearings out over and over, but I failed. In the end I needed no shims at all for about 0.007" endfloat.
[ATTACH=full]95167[/ATTACH]
Tomorrow I attack the timing chest!!! Lots of opportunity to learn, I think. It seems to me that the timing chest is probably the most complicated part of a Norton engine build. It is certainly the most intimidating part to me. Just to make my life even more interesting, I'm going with a Hunt magneto, and this will be my first time setting one of those up.
