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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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<blockquote data-quote="John Appleton" data-source="post: 16563" data-attributes="member: 760"><p>Tony, I have now measured two original ET100 feed bolts and can confirm that the holes in them both are 0.031" diameter. I can see where a confusion may creep in as the holes in both of them are stepped. The outer diameter that is visible is actually 0.040 and reduces to the 0.030 further in. The recently supplied ET100/1 also has a 0.030 hole, so whilst the information I was given in 1985 may have been true then, it no longer seems to be the case. It would seem to me that you should check that your oil holes are in fact 0.030, and then fit the 0.020" wires if you so choose. I must confess that the argument for removing the wires to increase the oil flow to the cams and followers seems to me to be a waste of time as the amount of extra oil passing where a thin piece of wire used to be is going to be minimal. I do not have the wires fitted in my engine, as they were removed in 1985 and I have had no trouble since.</p><p> As Stumpy so rightly says, if your trouble was being caused by excess crankcase oil, you would no doubt have a very smokey exhaust. I think all of this confirms that you should continue riding and enjoy the experience.</p></blockquote><p></p>
[QUOTE="John Appleton, post: 16563, member: 760"] Tony, I have now measured two original ET100 feed bolts and can confirm that the holes in them both are 0.031" diameter. I can see where a confusion may creep in as the holes in both of them are stepped. The outer diameter that is visible is actually 0.040 and reduces to the 0.030 further in. The recently supplied ET100/1 also has a 0.030 hole, so whilst the information I was given in 1985 may have been true then, it no longer seems to be the case. It would seem to me that you should check that your oil holes are in fact 0.030, and then fit the 0.020" wires if you so choose. I must confess that the argument for removing the wires to increase the oil flow to the cams and followers seems to me to be a waste of time as the amount of extra oil passing where a thin piece of wire used to be is going to be minimal. I do not have the wires fitted in my engine, as they were removed in 1985 and I have had no trouble since. As Stumpy so rightly says, if your trouble was being caused by excess crankcase oil, you would no doubt have a very smokey exhaust. I think all of this confirms that you should continue riding and enjoy the experience. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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