Sybhil seems to be running really nicely now Temp even good in this hot weather [8D] Touch wood 
Sybhil & no1
Sybhil & no1
electronic ignition
- Thread starter bluemouse1006
- Start date
I had a problem about 2 years ago that after 1 hour and 45 minutes the engine would stop and no fuel would come through, I changed carburator, coil, distributor, upgraded to electronic inginition (lumenition) i think, replaced fuel pump even and still no joy. In the end I found out that the fuel was boiling as unleaded burns hotter than 4* and the mechanical pump couldnt suck gas, so I replaced it with an electronic fuel pump positioned near the fuel tank and new fuel line, which totally solved it. With experience now I understand that the fuel pipe arrangement needs adjusting with a breather pipe as small as i can get from just before the carborator running back into the tank so that the system can get rid of any excess pressure, as sometimes if you stop then start within say 10 mins the engine takes a few turns to start, as opposed to on the button as usual.
Thats fuel vapourisation - the engine is hottest just after switching off (as WP no longer turning). Rerouting the lines or changing to braided will help.
Cheers
Jules
RatSport www.ratsport.co.uk
Cheers
Jules
RatSport www.ratsport.co.uk
heat and coils dont mix either, try and mount coils in a cool place within 18" of the dizzy. quite a tall order on a commer :I
reminds me of a bike i had, Ariel square 4, the hottest running bike in the world [:0] it used to start and run fine for about 15 miles, then it would drop cylinders one by one, forcing a stop. i would check a few things, pull a plug, yes its sparking, then it would start again and the cycle repeated.
it took some detective work to discover that the fully reconditioned magneto was breaking down the shellac insulation inside once it reached a certain temp.of course after stopping for 5 mins it had cooled enough to spark again [B)]
ended up sending it away to be re-done in some special extreme temp insulator material. after that it was fine
"you were only supposed to blow the bloody SLIDING doors off"
reminds me of a bike i had, Ariel square 4, the hottest running bike in the world [:0] it used to start and run fine for about 15 miles, then it would drop cylinders one by one, forcing a stop. i would check a few things, pull a plug, yes its sparking, then it would start again and the cycle repeated.
it took some detective work to discover that the fully reconditioned magneto was breaking down the shellac insulation inside once it reached a certain temp.of course after stopping for 5 mins it had cooled enough to spark again [B)]
ended up sending it away to be re-done in some special extreme temp insulator material. after that it was fine
"you were only supposed to blow the bloody SLIDING doors off"
S0updragon
Well-Known Member
Apologies for waking such an old post. The friendly AA man I was chatting with (my bike broke down) mentioned pertronix electronic ignition for my battle bus. I was wondering on the best options? I assume Martin will do a good reliable make?