Suzukidave wrote:72 & 73 cranks have thrust washers on the big end and none on the small end , also the pistons will be more narrow at the small end . 74 and later.. no thrust washers on the big end and thrust washers on the small end with matching wider gap pistons
Those pics were perfect, thanks a ton.
tz375 wrote:
I did just take an old scrap rod and results were pretty much as expected. It drilled easily through the copper coated steel until the drill bit reached the hardened inner core of the small end. Then I switched to a carbide cutter and it popped through into the small end leaving a small amount of swarf that was easy to clean up with a 1/4" carbide ball cutter.
BUT that was a single rod. I would hate to try that on a rod fitted to a crankshaft.
My conclusion is that the incorrect rod must be replaced with an later style.
Thanks for the test, that's pretty much what I had assumed. I'll let you know what I hear back from Bill's team.
Going to call bill this afternoon to see what they say. They should either machine the rod or replace it with a new style rod. Need to see if they found something wrong with the one that was part of that crank TZ was mentioning earlier or if they just didn't use it for one reason or another. If it doesn't have the openings, with the thrust washers (which it has to have, since they didn't tighten the large end), it'll never get oil mist to it and it'll blow pretty quickly.
Ive learned alot here about the 750 crank, and what not to do. thanks for everyones help, once again
