The flywheel on my R90/6 has been lightened, it weighs 2.380 KG, here are a couple of photos
This works very well and the engine has been balenced to suit.
However, I do have a problem wear of the starter ring gear. This wear was caused by fitting an 9 tooth starter on a flywheel meant to have an 8 tooth one, coupled with the starter relay sticking on twice, and each time it took me too long to get the tools out to disconnect the battery. as a result I have a very noisy starter, which does not always properly engage and disengage.
What is the solution?