Author Topic: 400 Falta timing (Read 3828 times)

tony27 · « **on:** February 04, 2017, 02:22:59 pm »

I've just received a Falta head to go with my Southbay modded Falta cylinder & have come across a couple of different ignition timing figures
Some sources like the Clymer manual say all 380s/400s should be timed 3.4-3.6mm but I've also seen a spec sheet that listed the Faltas as 3.8-4.0mm
Compression on the Falta was listed as being higher than the earlier models
What sort of timing figure are people using in their Faltas?

tony27 · « **Reply #1 on:** February 05, 2017, 04:33:38 pm »

Something strange I came across today, normal B8HS sits 2 or 3 threads up but a B8ES sticks out by about the same amount. I think the easiest way around this will be to turn up a 2.5mm thick washer to run under the longer reach plug

1/2" reach plug fitted

3/4" reach plug fitted

Wasp · « **Reply #2 on:** February 05, 2017, 05:14:43 pm »

Tony , make the spacer with a inside thread , so it can not fall off by mistake . Especially if you are in the pits or in a hurry . I have to do the same on my 998 engines to clear the valves .

tony27 · « **Reply #3 on:** February 07, 2017, 07:41:13 pm »

Unfortunately now that I don't work as a toolmaker I don't have access to a 14mm spark plug tap, will just bore it to a good size over the thread

tony27 · « **Reply #4 on:** July 01, 2017, 11:55:22 am »

3.5mm spacer lined things up nicely

Picked up another Falta head that has the same machined recess, haven't tried a plug yet to see if the same problem exists

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Author Topic: 400 Falta timing (Read 3828 times)

tony27

400 Falta timing

tony27

Re: 400 Falta timing

Wasp

Re: 400 Falta timing

tony27

Re: 400 Falta timing

tony27

Re: 400 Falta timing