Question about 1978 Yamaha TX 750

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I need to know what the marks on the timeing gear are in degrees the far right has a ''T'' under it and then there are 3 more the the left of that one what one is the 10 deg mark ?

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"T" = Top Dead Center, 1st mark to the left is 4 deg BTDC, 2nd mark to the left is 8 deg BTDC, 3rd mark to the left is 37 deg BTDC.
Above is shown in the drawing on this web page:

http://www.tobyfolwick.com/tx750/textual/timing.php

Also shown in the factory service manual under setting ignition timing. I no longer have my factory book, I gave it the guy who bought my TX750 in 2000.

Posted on Oct 13, 2009

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The T is top dead center the first make to the left is 10 deg

Posted on Apr 13, 2009

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I have this 89 acura legend 2.7l v6 timing belt removed and the water pump removed, the old pump failed which caused the belt to fail, i have new parts and the pump installed only i dont understand to...


Hi, here is what you need to do. Get all of the timing marks lined up as indicated in the picture below. Put the belt on. Without moving the gears off their marks, make the belt tight across the cam gears and then down the right side to the crank gear. All of the slack must be on the left side to be taken up by the tensioner. Release the tensioner to tighten the belt and then verify the marks are still aligned. If the marks are not aligned, loosen the tensioner just enough to turn the gear that needs to be realigned. After tensioning the belt, rotate the crankshaft clockwise 720 degrees and recheck the timing marks. I have pasted the book procedure below. Please let me know if you still have questions. You must get this right.

jturcotte_2242.gif

jturcotte_2243.gif



jturcotte_2244.gif



jturcotte_2241.gif

  1. If the crankshaft or camshafts have been turned with the timing belt removed, remove the spark plugs and advance the crankshaft about 15 degrees beyond TDC of No. 1 cylinder. Make sure the camshaft sprockets are properly aligned with the marks and return the crankshaft to the TDC mark.
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