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Old 06-23-2013, 10:18 PM   #1
tiger650
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Default triumph timing

NEED TO KNOW ALINEMENT OF TIMING MARKS FOR 1963 TRIUMPH BONNIE.MINE HAS MORE THAN MY 69 TIGER
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Old 06-24-2013, 01:20 AM   #2
Mr.Pete
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Default Re: triumph timing

If it has extra timing marks and they're confusing,don't use them.
Bring the pistons to TDC.
Rotate the intake camwheel clockwise intil the timing-side tappet begins to lift.Rotate it further until the tappet has lifted 0.125".
Rotate the exhaust camwheel counter-clockwise until the timing-side exhaust tappet begins to lift.Rotate it further until the tappet has lifted 0.100".

Keep the camwheels at those positions and slide the idler wheel into place.

Have a look and see if any of your timing marks are lined up.Permanently mark the ones that do (if any line up)
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Old 06-26-2013, 04:29 PM   #3
Greasy Nails
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Default Re: triumph timing

how many marks does it have? I know mine all have two. TDC and 38 degrees before
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Old 07-06-2013, 08:37 AM   #4
tiger650
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Default Re: triumph timing

intake 1 dot,ex 2 dots together,1 dot alone,crank 1 dot,center gear 2 marks together,1 mark alone,1 dot alone. ENGINE NUMBER T120 DU3062. So how do they go?
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Old 07-06-2013, 08:53 AM   #5
greasystain
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Default Re: triumph timing

http://www.lowbrowcustoms.com/page-v...ph_cam_timing/
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Old 07-06-2013, 09:29 AM   #6
Mr.Pete
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Default Re: triumph timing

If the cams are standard,you can do it like I said.If you're out by one tooth,the tappet lift at TDC will change by approx 0.049".
If the cams aren't standard,a degree disc will be useful.I like to measure at tappet lift of 0.080" on the opening and closing ramp.The lobe centre will be in the middle of those 2 degree readings.
100.5 degrees ATDC intake lobe centre.
100.5 degrees BTDC exhaust lobe centre.
It works out approximately that the lift at BDC will be 0.070" more than the lift at TDC.
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Old 07-07-2013, 11:13 AM   #7
Rob Axel
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Default Re: triumph timing

good info to have ....any chance getting this added to a Tech thread
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