Article: Secondary Cam Drive Chains - One More Time
It has been a year or two since this was last a topic of discussion. At the time I did not have chain samples in my possession for two of the three most interesting chains, the Cloyes "Z" chain, and the Morse Japan HD chain. Since then I have managed to get production versions of all three chain sets. I have photographed all three side by side for visual comparison and also personally miked each chain. The table below is a summary of the chain dimensional data.
The dimensional data can vary slightly from link to link on any given chain. The variation amounts to about a +/- 0.001" change for the most part. The Morse Japan HD chain is by far the most robust of the available chains and uses much more robust links than any of the other chains.
From a visual comparison perspective, here are the three chains as viewed from the top;
As you can see the Morse Japan chain is visually more robust than the Cloyes "Z" chain or the Ford OEM chain. When weighed on a gram scale the Morse Japan HD chain is substantially heavier at 239 grams. The Ford OEM chain narrowly eeks out a win, weight wise, over the Cloyes "Z" chain coming in at 192 grams vs the 189 grams for the Cloyes "Z" alternative.
This is a side view of the three chains visually comparing the link height and apparent axle sizing differences between the three chains;
The dark shadow on the right hand side of the OEM Ford chain is caused by lighting. In person the entire chain looks like the coloring on the left side of its picture. Again the Morse Japan chain is visually more robust.
The last photograph (below) is one of the Morse Japan HD chain's axles and their rollers. The Morse Japan HD chain has a very interesting construction for the rollers that facilitates improved oiling of the axle and roller. As you can see from the picture there are small orfices in each roller to allow oil to reach the axle the roller rides upon.
All the photos can be selected by right clicking and them. When you do they are high resolution, you can blow them up considerably larger to see detail.
I believe the Ford OEM and The Cloyes "Z" chains appear to be quite similar. Based on chain weight the OEM chains have a little more steel in them. The Morse Japan HD chain is decidedly more robust than either the OEM or Cloyes "Z" alternatives.
While nothing is bullet proof the Morse Japan HD chains appear to be substantially stronger than either alternative. I am not certain they will make you go quicker or faster but they do appear to provide a welcome increase in the cushion between chain failure and no chain failure - which no matter how you cut the cake has merit.
The Morse Japan HD chains are reliably available from only two sources that I know of, Accufab, and L&M.
It has been a year or two since this was last a topic of discussion. At the time I did not have chain samples in my possession for two of the three most interesting chains, the Cloyes "Z" chain, and the Morse Japan HD chain. Since then I have managed to get production versions of all three chain sets. I have photographed all three side by side for visual comparison and also personally miked each chain. The table below is a summary of the chain dimensional data.
The dimensional data can vary slightly from link to link on any given chain. The variation amounts to about a +/- 0.001" change for the most part. The Morse Japan HD chain is by far the most robust of the available chains and uses much more robust links than any of the other chains.
From a visual comparison perspective, here are the three chains as viewed from the top;
As you can see the Morse Japan chain is visually more robust than the Cloyes "Z" chain or the Ford OEM chain. When weighed on a gram scale the Morse Japan HD chain is substantially heavier at 239 grams. The Ford OEM chain narrowly eeks out a win, weight wise, over the Cloyes "Z" chain coming in at 192 grams vs the 189 grams for the Cloyes "Z" alternative.
This is a side view of the three chains visually comparing the link height and apparent axle sizing differences between the three chains;
The dark shadow on the right hand side of the OEM Ford chain is caused by lighting. In person the entire chain looks like the coloring on the left side of its picture. Again the Morse Japan chain is visually more robust.
The last photograph (below) is one of the Morse Japan HD chain's axles and their rollers. The Morse Japan HD chain has a very interesting construction for the rollers that facilitates improved oiling of the axle and roller. As you can see from the picture there are small orfices in each roller to allow oil to reach the axle the roller rides upon.
All the photos can be selected by right clicking and them. When you do they are high resolution, you can blow them up considerably larger to see detail.
I believe the Ford OEM and The Cloyes "Z" chains appear to be quite similar. Based on chain weight the OEM chains have a little more steel in them. The Morse Japan HD chain is decidedly more robust than either the OEM or Cloyes "Z" alternatives.
While nothing is bullet proof the Morse Japan HD chains appear to be substantially stronger than either alternative. I am not certain they will make you go quicker or faster but they do appear to provide a welcome increase in the cushion between chain failure and no chain failure - which no matter how you cut the cake has merit.
The Morse Japan HD chains are reliably available from only two sources that I know of, Accufab, and L&M.