Navigator crank and battery

Hello there,

I have a Jubilee crankshaft on the bench at the moment but I don't see any small holes except possibly for one on the flange of the timing side journal. This is a blanking plug for the oilway drilling as far as i can see and you would not normally remove this. So I don't know the answer. Maybe there is a difference in the Navigator crank. Maybe someone else knows.

My 1961 Navigator Standard runs 12V and the battery is a YB3L-A. You are limited to what will actually fit in the battery box and I bought my battery at an autojumble on the grounds it was the smallest and cheapest he had. I just guessed at the size. Actually you could fit slightly bigger so best bet is to measure the actual size of your battery box and buy accordingly. Battery capacity isn't very important as long as your alternator is charging unless you have your own special requirements.

Patrick

after rewiring my jubileeto 12 volt i now use a YTX7-LBS that fits very well and it'sthe old one from my honda hornet

keith r

Hi Keith.

Yes the Jubilee shaft has two large plugs - so there is a difference in the general crank layout. I think you will have to make the plugs for your Navvi but as you have already found a NOS crank maybe you will strike lucky again. Cycle thread or BSF are the most likely in my opinion - but it could be UNF or pipe thread or even a special such as BSF fine, maybe even Whitworth. Norton used them all somewhere on Jubilees/Navigators. Japanese bikes are so simple in comparison - it's either metric coarse or fine.

Hi Keith R. The Jubilee/Navigator are nice bikes to ride for a bit of fun but a teeny weensy bit down on performance in comparison to a Hornet. I bet you spotted the difference in the brakes very quickly. The YTX7 battery seems small for a Hornet - the battery in my VFR400 is bigger than that and has to be in top condition for starting.

Patrick

one of the best things i have done is fit electronic ignition to my jubilee .

the ytx7 is the battery for the 600 s model as for the brakes to different bikes so i ride them in different ways.

keith r

I have two Navigators and one Jubilee as actual runners -and one is converted to electronic ignition and two run the standard points. I am mixed up in my opinion about electronic ignitions as I have not noticed any real improvement in road performance. In fact I would say the points are superior as you can time each cylinder separately, if you can be bothered to do so. You are supposed to time each cylinder within 2 degrees of each other to achieve best performance.

On the other hand the points and condensors are fiddly to set whilst the electronic is effectively fit and forget (unless you have a flat battery). So you make your own choice.

It is very difficult to make the lightweight engine leak free for long - they can leak from so many different places but it will keep you occupied for a long time. I bet the Hornet doesn't leak any oil.

Patrick