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Post by 926am on Feb 6, 2017 16:43:38 GMT -5
Can someone please advise how to find tdc w/out flywheel marks?
I took out the spark plug and rotated the engine until I saw the piston come up & installed cam. The problem: After getting a tdc reading from my indicator (straight plastic zip tie inserted in vacated plug hole) engine can still turn (just a little) before indicator starts to goes down.
So if I'm following the indicator & rotating the engine, camshaft can be up to 3-4 teeth off and still be at indicator's tdc.
Perhaps I should try and average the distance that the indicator is up?
Any help is appreciated!
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Post by rockynv on Feb 6, 2017 22:10:41 GMT -5
Why can't you remove the timing check plug and use the timing marks? Its the easiest and most accurate way to go to pull the access plug on the flywheel cover and align the marks.
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Post by 926am on Feb 7, 2017 21:55:21 GMT -5
For some reason there aren't any marks on the flywheel. I had the cover off and couldn't find any. (Bought the bike used)
Any other thoughts? I'd use a timing gun if I could get it running.
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Post by rockynv on Feb 8, 2017 5:24:02 GMT -5
For some reason there aren't any marks on the flywheel. I had the cover off and couldn't find any. (Bought the bike used) Any other thoughts? I'd use a timing gun if I could get it running. The cover or just the small timing plug with the arrow that you align with the little notch/scratch on the surface of the flywheel. Its toward the back of the engine cover on the right hand side of the bike. Its only for valve timing and is not designed for use with a timing light for setting the ignition timing. The ECU/CDI takes care of the ignition timing automatically. You may have to clean some dirt/oil off the flywheel to uncover the mark. |
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Post by 926am on Feb 8, 2017 17:17:41 GMT -5
If I had the right-side cover off, where would the mark be in relation to the woodruff key? (Or what 'time' would woodruff key be at for tdc?)
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Post by 926am on Feb 8, 2017 17:36:03 GMT -5
I mean, at this point, I'm almost ready to get a new flywheel just for the timing mark!
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Post by rockynv on Feb 9, 2017 5:21:58 GMT -5
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Post by 926am on Feb 9, 2017 8:21:19 GMT -5
I appreciate your help Rocky, but I think you're missing my point: there are NO marks on the flywheel. I had the engine completely apart twice for crankshaft repairs and thoroughly inspected flywheel for timing marks and couldn't find any.
The way I see it I have 2 choices: either replace flywheel w/good marks or find a way to time it as is.
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Post by spandi on Feb 9, 2017 11:45:05 GMT -5
If I were in your situation, I'd just get a new flywheel. Why keep something around that will be a continuous problem when it can be fixed for around 50 bucks?
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Post by 926am on Feb 9, 2017 11:55:26 GMT -5
Yeah, I'm leaning that way...
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Post by rockynv on Feb 9, 2017 22:06:33 GMT -5
Or pull the head and scribe the TDC mark back where it belongs or get a timing wheel set on it and mark the flywheel. The link to the manual was to show where you needed to look to find any traces of the original mark if it was very faint and difficult to see. On your variation it could have been a light punch mark or acid etched.
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Post by 926am on Feb 10, 2017 10:44:45 GMT -5
Yes, that sounds good. Last time I had engine apart I marked flywheel with permanent marker (but I guess it wasn't very permanent!)
I have a new flywheel on order, so I may try using it as a guide for timing mark.
Thanks for all the help!
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Post by spandi on Feb 10, 2017 11:37:42 GMT -5
Yes, that sounds good. Last time I had engine apart I marked flywheel with permanent marker (but I guess it wasn't very permanent!) I have a new flywheel on order, so I may try using it as a guide for timing mark. Thanks for all the help! I think you'll find you're better off in the long run just replacing the thing and starting from a clean slate. Good luck, hope you're up and running soon! |
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Post by rockynv on Feb 10, 2017 12:28:54 GMT -5
If the new one is only acid etched you may want to take steps to insure it stays permanent using a spring loaded center punch or an engraver.
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Post by dollartwentyfive on Feb 10, 2017 16:11:46 GMT -5
Why can't you remove the timing check plug and use the timing marks? Its the easiest and most accurate way to go to pull the access plug on the flywheel cover and align the marks. have you tried this method? the timing hole is on the right side of the engine, but you must be on the left side to turn the crank. it was impossible for me. i got so fed up with it, i had to just "guess" when TDC was reached. i removed the plug, held my thumb over the hole, and turned the crank until i felt compression. i then gave the crank an extra 1/4 to 1/3 turn more. like i said, it's a guess, but apparently close enough to set the valves. if you ever do find the true TDC, then notch the end of the crank with a file. if setting the valves is your goal, then the following is even better: remove the valve cover. rotate crank until the rocker arms are on the low part of the cam (both rocker arms). replace valve cover. set valves. you don't need TDC, just make sure both valves are closed. |
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