Navigator timingUp to Light Twins
looking through the navigator and light twins book,for the navigator it gives 24 degrees for timing, while the others are higher, it also gives the exhaust gap as 0.066, both of which look rather like a misprint to me, so im guessing the exhaust is 6 thou, whats the timing in degrees btdc? 32? or is it the seemingly odd 24?
Re: navigator timingPosted by howard_thompson at February 03. 2010
I think both must be misprints/cockups and I would say that your suspicion that they should actually say 32 deg and 6 thou is probably right.
Interestingly, I've got the 'Twin Cylinder Manual' covering both lightweight and heavyweight twins and exactly the same info for the Navigator is given there, but that still doesn't make it right, especially so as the section that actually deals with setting the gaps refers to 'all lightweight twins' and says inlet 4 thou, exhaust 6 thou (still not quite right for the Electra though) and, oddly enough, the section dealing with setting the timing, again referring to 'all lightweight twins', talks about 30 deg advanced and 8 deg static, which applies to the Electra, but not t'other two which, as you're aware, should be 32 deg and 10 deg.
Seems that Norton Villiers Limited were about as good at proof-reading as they were at building Japanese-beating motorcycles!
Re: navigator timingPosted by Chris Grimmett at February 05. 2010
Roadholder No.270 which should be out during early April will have some useful information on this subject.
Re: Navigator timingPosted by andy_sochanik at March 10. 2010
24 degrees BTDC fully advanced is the correct figure for the Navigator ignition timing.
inlet 4 thou (0.004")
exhaust 6 thou (0.006")
BTW - Jubilee = 32 deg BTDC fully advanced
and Electra = 30 deg BTDC fully advanced.
Re: navigator timingPosted by andy_sochanik at October 20. 2010
The Exhaust gap is a misprint - it should be 6 thou (Inlet is 4 thou).
However, the ignition timing figure is correct - 24 deg BTDC, fully advanced.
(Jubilee & Electra are 32 deg & 30 deg respectively)