Other Stuff > Misc / Open

Setting timing with strobe.

<< < (2/5) > >>

Nurse Julie:
Well, I'm a lucky Lady. A chap that I know popped in for a cuppa this morning and I told him my tales of woe. He's an old boy who knows soooo much and is willing to share and help. Within 2 minutes, he had it all set up and strobed and it was absolutely spot on. I had set the points gaps in the correct order and with the correct gaps and set the timing but..... I didn't take any account of dwell 🙃🙃🙃🙃. I had set everything up as per the manual, which assumes all parts you are playing with are very new with no wear. Once he had set the points gap to about 0.00000001" of a thou, everything lined up perfectly and the bike started instantly and now rides as fast as a rocket ship. The Old boy said don't use the manual, throw it out of the window. I was pleased though that I had vaccumed the carbs and they were spot on where I had bench synced them to originally. A good learning experience for me.

MrDavo:
I can’t explain why after decades of bike riding, but I don’t understand dwell, in the same way that I don’t really understand the structure and rules of music, despite decades of listening to it.

Can someone explain what the old boy did, and why it was different to setting the bike to just opening the points at the timing marks?

Nurse Julie:

--- Quote from: MrDavo on May 12, 2021, 04:31:14 PM ---I can’t explain why after decades of bike riding, but I don’t understand dwell, in the same way that I don’t really understand the structure and rules of music, despite decades of listening to it.

Can someone explain what the old boy did, and why it was different to setting the bike to just opening the points at the timing marks?

--- End quote ---
Well it won't be me explaining it Dave 😁😁😁. It's electrickery and a dark art combined which I don't stand a cats chance in hell of explaining. All I know is that it worked.

K2-K6:
Dwell is just the time the points are closed for (the period that the coils are charged) in crankshaft degrees.

That's really the critical time period of the ignition system that's of interest as it's governing how much energy is stored. If you make the points gap larger it reduces the dwell as it just gets up the cam ramp sooner, and so gives the coil less time to accumulate energy.

Essentially you accept whatever points gap you end up with (within reason) to get the dwell and timing point accurate as that's what the ignition performance is based on.

Points gap only becomes a problem if the condenser can't absorb the spike as the points open, making small points gap problematic as the spark jumping across them (easier if gap is small) doesn't give clean switching to the coil to bang the HT current out on time.

fogrider:
Did you make a note of the dwell angle he settled on ?   If the bike now goes that well, check the dwell and record it for future use !
Regards, Terry.

Navigation

[0] Message Index

[#] Next page

[*] Previous page