<![CDATA[4BL flywheel removal]]>Hi I need to split the cases on my 4bl engine as either my big end or side bearings have gone. How do you get of the nut and then pull off the flywheel - its different from my other bikes with the usual centre screw puller?

thanks a lot

https://ibb.co/NyJFchD

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]]>https://dt125r.co.uk/topic/3271/4bl-flywheel-removalRSS for NodeMon, 09 Mar 2026 00:13:28 GMTSat, 13 Apr 2024 21:51:59 GMT60<![CDATA[Reply to 4BL flywheel removal on Sun, 14 Apr 2024 10:25:25 GMT]]>First gear, back brake on. I use a half inch socket with a slide bar, apply pressure to take up the ‘slack’ then a sharp tap with a rubber mallet usually does it…

]]>https://dt125r.co.uk/post/32000https://dt125r.co.uk/post/32000Sun, 14 Apr 2024 10:25:25 GMT<![CDATA[Reply to 4BL flywheel removal on Sun, 14 Apr 2024 07:38:07 GMT]]>@rubberfingers What @Calum said, or Lidl are selling cordless 20V impact guns from today which are as good as a branded one costing three times as much. Might be worth it if you've got to undo a few other bits to split the crankcases:

https://www.lidl.co.uk/p/parkside-20v-cordless-vehicle-impact-wrench/p10012652

]]>https://dt125r.co.uk/post/31998https://dt125r.co.uk/post/31998Sun, 14 Apr 2024 07:38:07 GMT<![CDATA[Reply to 4BL flywheel removal on Sun, 14 Apr 2024 07:02:11 GMT]]>You can get someone to sit on the bike and put the rear brake on and that can be used to undo the nut.

Or you can whip the cylinder off and place two pieces of wood on the crankcases and run a piece of metal through the small eye and use that to lock off the crankshaft.

]]>https://dt125r.co.uk/post/31997https://dt125r.co.uk/post/31997Sun, 14 Apr 2024 07:02:11 GMT<![CDATA[Reply to 4BL flywheel removal on Sat, 13 Apr 2024 22:53:06 GMT]]>Thanks any idea about how to get the nut off first? Is it am impact gun job?

]]>https://dt125r.co.uk/post/31996https://dt125r.co.uk/post/31996Sat, 13 Apr 2024 22:53:06 GMT<![CDATA[Reply to 4BL flywheel removal on Sat, 13 Apr 2024 22:31:11 GMT]]>@rubberfingers I think you need one of these:

https://www.machinemart.co.uk/p/clarke-cht698-46-piece-harmonic-balance-puller/

]]>https://dt125r.co.uk/post/31995https://dt125r.co.uk/post/31995Sat, 13 Apr 2024 22:31:11 GMT