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03 TTR 125L top end rebuild

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I'm doing a rope end rebuild and I have a few questions......

 

-Does the cylinder need to be measured or can I just buy the same Piston as I have now?

 

-Is this too much of a gap?IMG_20170415_103616.jpg

 

-Is honing a must?1492268691512.jpeg

 

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The service manual will have specs where to measure and when the cylinder/piston is out of service specification based on clearance measurements.  There are also measurements that come into play for the rings. That is when you get the next step up piston and have it bored.  Any good machine shop will want the piston and cylinder so they are matched.

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