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TY250 A points setting

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I have to do the timing with the head off my B model, I have a magnetic base for the dial that make the job easy.

Guy

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9 hours ago, motosolex said:

Hi FeetUpFun. 

When timing my TY250, my dial indicator is too large and won’t function due to bikes’s frame with tank off. 

I am thinking I’ll need to remove the head and make a gizmo-bracket to mount dial indicator (as in bike’s shop manual)

Any ideas on this? 

Or do you know of a smaller dial indicator that will work without removing the head?

thanks  

 

 

I avoid needing to use a dial indicator by measuring the advance around the rim of the flywheel. Initially you need to establish where top dead centre is, and you don't need a dial indicator for this. I use a TDC tool which is really just a rod in a guide that screws into the plug hole. Anything that will fit will do the job. Then make a mark 21mm anticlockwise around the rim from top dead centre and use that position for checking the position of the points opening.

The TDC tool is marked in mm and some people use this scale to measure piston position BTDC but I don't think this is accurate enough for the job.  https://www.inmotiontrials.com/product/tdc-timing-tool-14mm-plug-hole/

If you still feel the need to use a dial indicator but don't want to take the head off, you could take off the exhaust, loosen the carburettor and remove two of the engine mount bolts so you can tilt the engine down at the front and fit the dial indicator.

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17 hours ago, motosolex said:

Hi FeetUpFun. 

When timing my TY250, my dial indicator is too large and won’t function due to bikes’s frame with tank off. 

I am thinking I’ll need to remove the head and make a gizmo-bracket to mount dial indicator (as in bike’s shop manual)

Any ideas on this? 

Or do you know of a smaller dial indicator that will work without removing the head?

thanks  

 

 

Do it once and mark the flywheel so you can use a strobe in future.

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Thank you fellows. Thinking I’ll remove the head and go at it that way. Of course a new head gasket too. 

I am not sure how to use a strobe light vis a vis points. 

 

Edited by motosolex

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