justin_o_guy
Ex Member
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Putting a new chain on a "one chain worn" set O gears was no problem. I also had the worn guides in the equation. The tensioner was out something like 8 mm of the 18 allowable with the rear guide bent as much as I could bend it. So, question is, In my mind, how tight would the tensioner have been with new guides? I expect new guides would have yielded a tighter chain, but the 8 mm wouldnt have gone away. When we are talking about side deflection of 8 mm, the length change is very small, considering the length of the chain. I would say ~2.8 mm of chain length is soaked up, OHH, but it's done twice, above & below the tensioner, so 5.6 mm of chain length would be taken up by an 8 mm deflection.( I didnt draw any models, just used the square root of 8 as the difference between the imaginary straight line of the chain with no tensioner on it & the triangle created when the chain is deflected, so you engineer types may see a glaring oversight. PLease, feel free to correct my thinking if I am off base.) Remembering that the cam drive gear is removed to get the chain on & that the amount O slack was minimal I wouldn't think the chain could be much shorter & still get it on.
UNless, the ID of the cam drive gear could be relieved to allow it to sit lower on the cam while the chain was slipped over the teeth. Hmmm, that sounds doable. Just have to do it on both sides for balance & stay away from the bolt holes & index pin.LOcate the hash marks that line up with the head & go up & down with a grinder ,,,, OOOPS, wouldnt that load the bolts with the whole cam chain varying tension? Doesnt the cam drive gear fit snug on a shoulder? I'm not sure the ID of the gear isn't somewhat load bearing. If so, relieving it to get a tight chain on might be a bad idea.
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