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Chopped Twin Running At Last!
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<blockquote data-quote="davidd" data-source="post: 93191" data-attributes="member: 1177"><p>Bill, </p><p></p><p>I have seen some frames that are like Roy's, the welded plates are there, but no bolt hole. I don't have any problem with Roy's comments. I have a non-slotted hole in EV4, but I never seemed to have an expansion issue, or I did not notice one.</p><p></p><p>When I started building frames it became evident that it was impossible to fit an newly built Egli frame to any or all engines because the the dimensions of the engines are all different. The stock UFM attaches to the two head lugs only, but the Egli frame attaches to the two head lugs and the swing arm bolt. That is impossible to do without a good measurement of the specific engine that is to be fit. If an engine fits an Egli frame off the bat it is like winning the lottery. Godet can do it because he is building the engines and the frames at the same time.</p><p></p><p>One of the possible solutions to making a universal fitting Egli frame is to not drill the hole for the rear cylinder. This allows a "fudge" to be done on that rear lug hole in order to custom fit the frame. I made a bolt on jig that allowed me to drill the rear hole after mounting the frame That is a possibility. Either way is probably fine because the full Egli frame attaches in three locations as I mentioned. Omit the rear head lug bolt and it is still attached in two places. </p><p></p><p>In the end, I eliminated the seat portion of the Egli frame on my builds and built my frames like the original Vincents with a UFM and an RFM. This eliminated the problem with lining up all three holes to the engine.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 93191, member: 1177"] Bill, I have seen some frames that are like Roy's, the welded plates are there, but no bolt hole. I don't have any problem with Roy's comments. I have a non-slotted hole in EV4, but I never seemed to have an expansion issue, or I did not notice one. When I started building frames it became evident that it was impossible to fit an newly built Egli frame to any or all engines because the the dimensions of the engines are all different. The stock UFM attaches to the two head lugs only, but the Egli frame attaches to the two head lugs and the swing arm bolt. That is impossible to do without a good measurement of the specific engine that is to be fit. If an engine fits an Egli frame off the bat it is like winning the lottery. Godet can do it because he is building the engines and the frames at the same time. One of the possible solutions to making a universal fitting Egli frame is to not drill the hole for the rear cylinder. This allows a "fudge" to be done on that rear lug hole in order to custom fit the frame. I made a bolt on jig that allowed me to drill the rear hole after mounting the frame That is a possibility. Either way is probably fine because the full Egli frame attaches in three locations as I mentioned. Omit the rear head lug bolt and it is still attached in two places. In the end, I eliminated the seat portion of the Egli frame on my builds and built my frames like the original Vincents with a UFM and an RFM. This eliminated the problem with lining up all three holes to the engine. David [/QUOTE]
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