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Post by lolly on Aug 13, 2020 9:18:18 GMT 1
Right so I take it I need to find Tec on the piston then go back 1.8mm then get the timing mark on the stator to line up with the flywheel mark Steve can you give an idiots step by step guide to doing the timing ; for instance i keep seeing figures quoted 1.8 mm or 2 mm ; where is this measure taken ? cheers john |
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Post by midlifecrisisrd on Aug 13, 2020 10:38:56 GMT 1
Right so I take it I need to find Tec on the piston then go back 1.8mm then get the timing mark on the stator to line up with the flywheel mark Steve can you give an idiots step by step guide to doing the timing ; for instance i keep seeing figures quoted 1.8 mm or 2 mm ; where is this measure taken ? cheers john It's the distance the piston is before tdc Ideally you need a dial gauge as shown in the thread I was just setting it roughly so I took a vernier caliper and poked the rod down the plug hole then turned the flywheel till the lh piston pushed the gauge as far as it would go. I reset it to zero then pushed it further out to show 1.8mm then locked the gauge to stop it moving I then put it back into the left plug hole and turned the flywheel till the piston just touched the end of the gauge At that point the mark on the flywheel should line up with the marking on the stator plate If not slacker the bolts and rotate till the marks line up I rechecked about 5 times to make sure As said it is not 100% accurate but not a million miles out Steve |
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Post by lolly on Aug 13, 2020 11:11:00 GMT 1
can you give an idiots step by step guide to doing the timing ; for instance i keep seeing figures quoted 1.8 mm or 2 mm ; where is this measure taken ? cheers john It's the distance the piston is before tdc Ideally you need a dial gauge as shown in the thread I was just setting it roughly so I took a vernier caliper and poked the rod down the plug hole then turned the flywheel till the lh piston pushed the gauge as far as it would go. I reset it to zero then pushed it further out to show 1.8mm then locked the gauge to stop it moving I then put it back into the left plug hole and turned the flywheel till the piston just touched the end of the gauge At that point the mark on the flywheel should line up with the marking on the stator plate If not slacker the bolts and rotate till the marks line up I rechecked about 5 times to make sure As said it is not 100% accurate but not a million miles out Steve cheers ; alot clearer now ; i just couldnt get head around where the dims were taken from . It looks like my stator is on the way out ; so rather than get it rewound i may get one of these fancy new ones |
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Post by arrow on Aug 13, 2020 12:12:41 GMT 1
There is a factory tolerance of +/- 0.15mm on the quoted setting.
So Yamaha are saying it can be 1.85mm BTDC, to 2.15mm BTDC.
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Post by damiensk on Aug 13, 2020 22:33:14 GMT 1
as per midlifecrisisrd, check it a few times to be on the safe side.
with the gauge i bought, once i had triple checked i was getting TDC, set the gauge to zero and rolled back 2mm,
two revelotions on this gauge.
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