'68 Trophy mainjet

 This is just to add something to this unfortunatly sparse news group.
I put a larger mainjet in my '68 Trophy on the weekend and it runs a wee bit
better at full throttle now.
It still eight strokes at really small throttle openings on a light load but
I may lift the needle a notch, see how that goes.
It did improve it a little by changing to a "4" cut-away slide though.

 FOG wrote:

What do you mean "eight strokes".

This group just needs a couple regulars to post questions.

Have you seen the new T'bird?  I had a 72 Bonneville as my first ride. I
now have a '07 Bonneville Speedmaster.

Clay

 Eight stroking, sort of like missing, firing only every forth revolution,
the four stroke equivelent of a two stroke engine "four stroking"
I don't quite know how else to decribe it, always known it as that, sorry.

I have seen pics of the new T'bird but I am not sure what to think about it,
too much of a Harley clone maybe.
I have ridden an '08 Speedmaster, but personally I like the standard Bonnie
better. I rode the Speedmaster in the suburbs of Sydney and I felt it wasn't
suited to that kind of riding, especially in heavy traffic and around tigh
corners and roundabouts as such, would have been much better on the freeway
and long straight main highways I would think. I like the mauverability of
the standard bike around town and on country roads and lanes.

FOG.

 FOG wrote:

Okay, skipping or missing is more common too me. Sounds like it could be
  electrical problem, points or coill. Do you see this more when cold,
or in damp weather?

I like the Standards better too for twisties and things, but I like the
cruiser style, and didn't want a v-twin Harley wannabe. While the
Standards handle better, the Speedmaster and America handle better than
any other cruiser out there!

Clay

 

No I don't think it is electrical, I am running a Boyer electronic system
and have recently gone through that part of the bike for other reasons and
all is o.k. with the ignition.
It is not heat or humidity sensitive either.
I think it may try lifting the needle, with the larger mainjet it may be
o.k.
It is a bit hard to decribe as I have said, it is not really a misfire
because it does not do it under load, it is clean at all throttle openings
loaded but just at low speed and an almost closed throttle.
I am also almost resigned to the fact that I may have to just live with it
as it is not really that bad and may just be a case of "Theyr'e all like
that mate" syndrome!
Thanks for the suggestions though.


Yes I got the impression that the Speedmaster would be a good long distance
cruiser, a bike you could ride all day in comfort, maybe next time I'm up
there I will borrow it again and go for a real ride.

O.k. thanks again for the suggestions, I will have another try with it
tomorrow and post the results.
bye for now.
FOG.