im quite sure this was a simple fix, but the OP sounds very new to this. I wish I was there im sure his bike would have been sorted days ago. But I guess thats all part of the learning process

 

What's the fix? Leak down? That's not a fix, that's a tool..

 

talking about the original issue with no spark, no electricity. that compression not that low to not start the bike.

 

Unless I missed a few post's, I dont understand why he DID a leak down or even a compression test in an attempt to diagnose loss of spark.I get that we're workin over the internet but the two are as unrelated as loss of taillight and cam timing.

 

it won't spark if there is no compression. But I agree his compression is good enough so that when cranking it would "sense" compression and spark.

 

If the battery drops below about 9.5 volts while cranking the motor won't spark. While I'm not positive about sparking one M8s but do know on TCs. As stated in other places if there isn't good compression on the rear cylinder the ECM probably won't make sparks or send fuel for that matter.

One thing the OP can do is enable Min/Max on the DMM and measure the voltage across the battery while cranking. Have to connect the DMM first then enable and hold there.

Measuring cable ohms is a waste of time with that DMM. Voltage drop across each line while cranking can be done.

 

If M8's are like TC's with cranking and ignition, I'm skeptical about having enough compression for ignition, the spark isn't the first problem on the list, being down on compression 70+ lbs on both cylinders is #1, then add ACR's drop to that.
He says the engine was rebuilt, it seems the heads and valves where just cleaned and valve stem seals replaced, as mentioned in one of the post.
We need more details, what was done with the pistons, rings and cylinders?
The problem could be many things, maybe even pistons with the wrong compression height.

 

I missed that part. I thought it was like 140.. I'll agree if only 70 psi.

A common issue with newbs is adjusting the pushrod too deep. New lifters have light machine oil in them and they bleed as fast as you can twist the wrench. In that case, I've seen here that they adjust to complete compression of the plunger before going the prescribed number of turns. At that point the valves are off the seats. The is a lot of stuff going on here to figure out what the issue is..

 

Max, this his post on compression test, he said 130 with or without ACR if I'm understanding correct, tock M8's are what, 215-220? somethings wrong.
I agree on the pushrod adjustments, suggested that days ago

 

he readjusted his pushrods and the compression was the same. Still at 130 it should fire the plug. Compression will sort out after but its a different issue. His loss of spark was the main concern