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Powerbike pinking problem

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Powerbike pinking problem

Post  ztis1 on Wed Nov 14, 2018 7:20 pm

I'm having a problem with a junior de-luxe engine knocking badly under light load. Close the throttle and it stops, open it fully and the knocking stops and it goes like a train!

Has anyone experienced anything similar? It's just been rebuilt and all the settings are as per the book.

Thanks,
Ian

ztis1

Posts : 6
Join date : 2018-02-09

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Powerbike

Post  kerabo on Wed Nov 14, 2018 7:52 pm

Would need to hear it running but if the timing is correct does it have the correct piston fitted?

What fuel are you using ?

Is everything tight?

Ken
kerabo
kerabo

Posts : 2601
Join date : 2008-02-11
Age : 68
Location : Falcon 87..1936 Cruiser 39. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

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Powerbike pinking problem

Post  ztis1 on Wed Nov 14, 2018 8:00 pm

As far as I am aware the piston is correct and I'm using regular unleaded.

ztis1

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Powerbike

Post  kerabo on Wed Nov 14, 2018 8:06 pm

Can I ask how you timed it
Ken
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Location : Falcon 87..1936 Cruiser 39. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

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Powerbike pinking problem

Post  ztis1 on Wed Nov 14, 2018 8:44 pm

Hi Ken,
I set the timing statically by lining the marks up on the flywheel with the piston at TDC. I suppose the next step is to see where the points actually open!

Regards,
Ian

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