Rebuild thread. Will update as we progress. I know how you like photos so let's get started. Tank and seat off. Fuel pipes are as hard and brittle as cast iron. Side panel off. 7/16 coming in very useful. Recognised size of bolts straight off, all coming back to me.
I wish! It's all part of the fun, be boring if it was easy. Anybody know the firing / crank angle of these engine's?
I presume alternate firing? As one sucks other is on bang and then blow / squash as a pair. Doubt they had big bang engine back then
Coat it in molasses or stick the rusty chromed bits in a bath of molasses, it will eat the corrosion off/away, leaving you with bright shiny bits that require minimal Polish work.
Both right. It IS a parallel twin fitted tranversely (side to side) rather than longitudinally (in-line). And they do fire alternately unless twingled with a camshaft mod to go Big Bang. If you have ever ridden one two up under moderate acceleration you can feel the power strokes as it labours a little.......or maybe it is just the vibration!
She's coming on a treat MrO you'll have her going up the road in no time I think you still failed to mention how much though
Look at this explanation https://www.bikesmedia.in/reviews/d...arallel-twin-cylinder-motorcycle-engines.html
Another mod that’s possibly been done to Bonny is the fitting of Amal Concentric carbs. I think they were first fitted in ‘67/68 ???? but I may be wrong twas a long time ago is my excuse. Standard fitment would have been Amal Monoblocs.
