Loose Bruce Posted Monday at 09:01 PM Report Share Posted Monday at 09:01 PM 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 Quote Link to comment Share on other sites More sharing options...
RonH Posted Monday at 10:09 PM Report Share Posted Monday at 10:09 PM (edited) 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 Tuesday at 02:44 AM by RonH 1 Quote Link to comment Share on other sites More sharing options...
teamferret Posted Tuesday at 02:25 PM Report Share Posted Tuesday at 02:25 PM 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 Quote Link to comment Share on other sites More sharing options...
Loose Bruce Posted Tuesday at 03:37 PM Author Report Share Posted Tuesday at 03:37 PM 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 Quote Link to comment Share on other sites More sharing options...
Loose Bruce Posted Tuesday at 03:48 PM Author Report Share Posted Tuesday at 03:48 PM 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. Quote Link to comment Share on other sites More sharing options...
lemur Posted Tuesday at 04:09 PM Report Share Posted Tuesday at 04:09 PM 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. Quote Link to comment Share on other sites More sharing options...
Loose Bruce Posted yesterday at 10:07 AM Author Report Share Posted yesterday at 10:07 AM No such luck ! I can only assume that I need to make a flat plate puller, drill with 3 holes to match the threaded holes in the flywheel. Then drill a centre hole, weld on a nut, then ues a bolt to push to flywheel off. This maybe easier said than done. 1 Quote Link to comment Share on other sites More sharing options...
b40rt Posted 20 hours ago Report Share Posted 20 hours ago https://www.ebay.co.uk/itm/256712780443?_skw=small+flywheel+puller&itmmeta=01JKBH332BJZYE5KQE2T96X3NY&hash=item3bc5462a9b:g:aBcAAOSwW4tnMrPw&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKlhG732%2BupRwY3DOA5CxHX1jByJijKdseRzyg7CYmylWbKCoQ6QG9EoffBidjWULoTqjwgxTAsxEtva%2BDwRptQbmf6MNNVGYSLzeKYzzgBjosmVVPwfbnya6b%2B9zA2uy6o4iv0xKv67AFih8BfP8pI0%2BEK6I7bQr50oUcXigLiHMfaqt1RnUm%2FY5UysovtqZzwXJvwVR534pfWrVWiXnr3nCdS6ts6yBN7O6QpH45Eyll3JEjpPPGNns23hfSWAkdg5LeOKfLG0P8yizo1%2BS3uQgsEqML91sblGw13Qb4bRRw%3D%3D|tkp%3ABFBMrrGM8Zpl Quote Link to comment Share on other sites More sharing options...
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