Camshaft timing marks

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frank B
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Camshaft timing marks

Post by frank B » Wed Oct 10, 2018 3:15 am

b50t 1971 stripped engine down fitted new rings checked everything over, rebuilt, aligned crank shaft and cam shaft marks but bike will not start, plenty of spark, petrol and compression, have moved timing marks on camshaft either side of crank shaft mark but still no joy, i read in an American motorcycle magazine that some early camshafts were a bit suspect, bike started well before strip down. can anyone here PLEASE HELP me regards Frank. <216

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Re: Camshaft timing marks

Post by minetymenace » Wed Oct 10, 2018 4:15 pm

Something tells me that it is something else. Does it fire at all? Cos with compression and fuel all you need is a spark to make it go bang. A timing disc on the rotor should give you a clue that the valves and spark are somewhere near.
There is no evidence to support the notion that life is serious.
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Re: Camshaft timing marks

Post by beat » Wed Oct 10, 2018 8:31 pm

frank B wrote: bike started well before strip down.
Frank, - you have messed it up :!:

maybe fore some help:
- is spark really on compression stroke ??
- by ready to run: is spark just shortly before TDC ??
- how is the compression itself ??

beat <017

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