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Thread: Excelsior bottom end kits

  1. #1

    Default Excelsior bottom end kits

    I am building 16 Excelsior bottom end kits. I will probably split the build with half early and half late model. The kit includes rods, roller bearings, retainers, pins, nuts, case bushings and thrust washers. If interested, contact me here: Thanks, Phil


  2. #2


    Will.these rods have replaceble outer races in the rods as well or will the rollers run in the rod like originals?

  3. #3


    Hi Mick. As it stands the rods are identical to the originals. I have considered using inserts. The inserts can only be .0625 thick and would have to be through hardened 52100 and ground to size. With that small cross section relative to diameter, keeping them round could be tricky. The roller diameter decreases to .1875 from .25. This increases the roller velocity by ~40%, which probably wouldn't be an issue with some sort of pressurized oil system. So without some extensive research I don't want to make a customers engine a test bed for dynamic design changes and not have it work. Phil

  4. #4
    Join Date
    Nov 2009


    Hello all,

    To anyone interested in these parts, I can say this: Locating good usable original parts for these X motors is virtually impossible. I all you want to do is start up your X once in a while and putt around the parking lot, you will need to replace all these parts! The rods are very weak, the races are not replaceable and are generally worn and pitted, pins are always worn, rod cages are prone to break and crankcase bushings are usually worn out. There have been a few sources for some of these parts, but not all and the quality is not well proven. A few guys have had rods made up by Carillo at a much lower cost than Phil's but, they don't fit, so they are either useless or require a lot of other modifications!!!!

    I have a set of these parts for my 24 big X engine. They look and measure up perfectly and in speaking with Phil, the materials he uses are many times stronger than the original parts. I've not run these myself yet but I know Steve Huntzinger has and they are Cannonball proven, so I feel I can vouch for them. Phil makes exceptional, high quality parts and you can get the entire bottom end set in one place, and that's worth a lot!

    Phil, do you care to share the price and delivery time for these parts here?

    Gene Harper

  5. #5
    Join Date
    Sep 2005
    Sarasota, Florida


    As an ex-Excelsior collector/lover; I can say how difficult it is to find good, useable motor parts for the Big X. Phil's parts are top drawer, quality made parts and will easily out-live us old bastards
    Eric Smith
    AMCA #886

  6. #6
    Join Date
    Apr 2013


    Email sent,

  7. #7


    Here are rods we had made for big x excelsiors here in australia. They have replaceable outer races, cages and rollers in the rods from a harley sportster and rods beefed up where they crack and fail on the original rods. These rods are also good for 100hp!
    Attached Images Attached Images

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