g5wqian wrote: ↑Sat Dec 30, 2017 8:45 am
champion N5C plug is better , will burn off and run hotter .
re the primary cover , i have no sealant on mine and use the clubs foam rubber new type seal and it doesnt leak , but there are other holes in the rear of the backplate that could leak if not sealed .
it may not be the primary thats leaking though , could be gearbox if its a burman box , my burman leaks and took some time to work out where the oil came from as i was thinking it was the chain cover .
with the carb youll find it runs slow when cold and then speeds up when engine warms up , but you may well need to turn up the idle speed before starting , by around 3/4 turn and then it will idle cold , then when engine warms up back off the idle speed .
idle screw is easy to adjust externally if you have a monobloc carb , its the bigger screw facing downwards .
putting bike on sidestand makes mine run bad unless idle speed is high , it will usually stutter and conk out if left on sidestand but runs ok with the centre stand .
you may be able to adjust the float level or check it , if its a pre monobloc carb it may be easier to check it out , but also remember to check float bowl for rusty sediment and clean out if necessary .
i have an old senspray carb on my older bike and the very fine sediment of rust from inside the tank gets past the filter and now and again it will conk out , so i will have to take the float out and clean bottom of the float bowl of sediment before it goes again ..
be carefull leaving bike running as if mine revs above a certain level it will move backwards on the stand .
you really do need to use the retard when starting or some time youll get a nasty kick back .
ammeter -- depends on whether it is a 8-0-8 amp type and what the dynamo is , but dynamo may well be a 60w type i guess , and if the ammeter is a good old one or a new one made recently .
i had to replace my ammeter when the moving coil fell apart , so i put one of the new lucas ones on there , but at same time id had my dynamo off and rebuilt it due to oil getting in from the timing cover on my particular model .
did have to swap wires on ammeter round though as the new one is wired opposite way round to previous one .
running with the 35w bpf bulb i find ammeter drops minus 4 amps at idle when light is on and when bike revs up it goes to zero and into the + side , and with light off it goes to plus 4 amps charging .
i did reflash the polarity of dynamo after rebuild , easy job just disconnect the negative wire from battery [the non earthed one ] if its positive earth .
remove the wires from dynamo socket and with a piece of wire connected to the -ve battery terminal you flash other end of wire on the F terminal of dynamo a few times for a second or so each time , it should make a flash each time you swipe the bare end of wire over the F terminal , this is then polarised for pos earth.
with the new lucas ammeter i found it moves slowly compared to the old ammeter i had , and because i rebuilt the dynamo i did flash it 2 separate times and had to put a fair load [35w bulb] on it before it would charge to a higher degree although it does have new brushes in which may have required a run up for a few minutes before bedding in to the armature .
seems to work fine now .
i was running a LED headlight bulb but after putting the filament type back in again it looks like i have a better pattern with the old style bulb so am going to try it out for a while and see which is better for me at night .
i dont do much night riding but the last time i rode from oxford to swindon in the dark it was not the best of trips with the LED light not giving me the type of beam i should expect , and i had played with a couple of headlight units and found the lucas one to be best pattern with the LED but never tried the old bpf bulb in the new lamp so will give that a go .
i do ride down near you neck of the woods when the weathers better , usually around chilton foliat and hungerford and newbury area , quite good lanes around there to have a look around and good views .
if you go up above ramsbury you can still get on the old wartime airstrip and have a quick blast along it , missing the pot holes as you go .
regards
ian