Grand Prix 500
Main Motorcycle: 1976 Triumph Bonneville
Join Date: Feb 2009
Location: Canoga Park, CA
|Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.|
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could this be the valves? should I open the head and see if they need to be replaced or get some grinding compound?
would love advice on what to do next.
Mr Furball -
You need to find the correct workshop book for the model you own, and not trust the Haynes. Valve clearances changed for 750 twins in the mid-70's. Haynes is noted for all sorts of mistakes as they don't do a good job of distinguishing between years.
As a note... Although the factory recommended .002 & .004" up to 1972, Triumph Baltimore recommended .004 & .006", so I never use .002" on anything. Valve lash is not the super critical adjustment some people make it out to be... unless it's too tight!
If your bike is still missing, then check the timing at full advance (5000 RPM) with a strobe lamp. If you are running B8ES, then swap to the correct B7ES.
It could just be that you need a brighter strobe or a darker work area.
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