Huntmaster Bottom End

For gasket sets see click here; individual gaskets click here; pistons click here; for oil, oil pipes and unions click here; for ball bearings click here.

It is a good idea to have the big-end eyes of alloy con-rods checked for ovality and it is imperative that the oil ways are cleaned out. When rebuilding the bottom end of a Huntmaster or other engine with a plain timing side bearing we strongly recommend that the bushes are fitted to the crankcases and then ‘line bored’. This will ensure that they are in perfect alignment with the drive side roller main bearings, resulting in a perfect bottom end, which will last many thousands of miles. We can of course carry out this work on your behalf, the cost of fitting each bush. We consider this money well spent for peace of mind and saves many hours of scraping in bushes, which is frequently required otherwise.

The crankshaft end float should be .001”-.003”. The diameter of the big end journal was increased in 1958 but this later crank is often found in earlier engines so please check. Standard size of the small big end journal is 1.460”, large 1.687”; timing side journal 1.375”. Big end nut torque setting is 22 lbs/ft.

Prices of camshafts are for exchange only, THIS MEANS THAT WE WANT YOUR OLD ONE FIRST. If the lobes of the cam are badly worn there will be an extra charge to cover the cost of building them up, price per lobe is part number 1750-91. Additionally if the camshaft is worn where it runs in a bush or bearing there will be an extra charge for reclaiming it by industrial hard chrome plating it back to size, price is given by part number RES-14. This guarantees that you get a good cam. The profiles we use are close but not necessarily exact copies of the originals. We can recondition any cams not listed.

Timing Case Screws Individual screws may be ordered but for convenience the contents of each set are listed. Sets with a ‘Q’ suffix are in stainless steel.