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I have checked the compression and the readings are 185psi on the front
cylinder and 186 psi on the rear cylinder. I have had new hardened valve
seats fittedand stainless steel valves. The cylinders have been rebored and new pistons fitted, the bore is now on 86.6mm with forged pistons.

Finally got my darmah ssd running, spent a small fortune getting there.
One question, what is the best octane rating to run my darmah on, over
here in the u/k we have unleaded 95 ron and super unleaded 97 ron.
Should I be using an octane booster on an engine with a high compression
ratio of 9.5 to 1.

Thanks for the advice. Forgot to mention that the igniter boxes have already been swapped and it still spit back. The wires from thr pickups have already been changed when I got the bike but I do not know how long ago. I think for peace of mind I will change them as I have a length of pickup wire ...

Hi all
I have just finished rebuilding my Darmah SSD which I purchased last year. On starting the engine it fired first go and I was very pleased but as the engine revs rose to around 2800rpm it spat back through the front carb, this will not go away. The bike has new coils and plugs, the heads have ...