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Sammy Miller Hiro Engine


Loose Bruce
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HI All,

Does anyone know how to remove the flywheel on the Hiro engine. It seems to be in two parts. Does it need a special puller?

I am trying to get to see the ignition system to see if it is set correctly, which leads to me next question. How do you set it??

Thks

Bruce

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Watch the first video in this article. Sammy Miller takes the flywheel off himself. He just uses a strap holder and a wrench. No puller. He also briefly mentions how to adjust the ignition. Hopefully you can see what he does. Good luck!

https://sammymiller.co.uk/sammy-miller-mbe-unveils-newly-restored-miller/

Edited by RonH
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check the ignition using a strobe. They don't normally alter, but obviously someone could have built it up and hot checked the ignition. The system is identical to the suzuki singles of the same era. The flywheel is in 2 pieces as it has an extra weight added for trialing

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I watched the video, but it looks as though Sammy had previously loosened the flywheel, hence it came off so easily.

It would also appear that a Motoplat ignition system was installed, which is different the what i have on my bike. It is not a 2 part flywheel.

So I am going to make up a removal plate with centre bolt to remover the flywheel. 

When I manage to start the bike it is blowing back through the carb, which makes me believe the timing needs adjusting. Not sure if it needs to be advanced or retarded. It may even be some form of pre ignition. It could also be a faulty CGI box. The list is endless. I will check the Suzuki system, should I need to replace the existing.

As for using a strobe, would I not need to find some timing marks on the flywheel?

If all else fails then Sammy Miller lives 20 minutes down the road from me, so I may ask his advice.

Thks

Bruce

 

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18 minutes ago, Loose Bruce said:

I just spoke to Sammy on the phone, and he seems to think that the flywheel has an inner threaded section for a screw-in type puller.

Will check tomorrow to see if the Maestro is correct.

If it is a Suzuki part that is exactly how it is done, there is an inside thread immediately around the perimeter of the locking nut and that should be visible on close inspection.

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