Laverdalothar
Hero member
- Location
- Germany
just wanted to give a heads up to check filters of the ped cocks and also the carbs for rust and dirt.
wasn't on a Laverda, but we had my dad's bike (old Triumph BDG 250H) completely dismanteled and restored the engine. However, on first tour, the bike started pinking after several kilometers and did cut out. you could re-start the bike right away, but with the same result (and the distance between stops got worse and worse...).
I took the fuel-pipe off the carburator and saw fuel almost just dripping out of the pipe...
at home, we measured the fuel flow with a simple method: took a beaker with a ml-scale and stopped time until 100ml went into it. Took us 2:23 Minutes! Doing the maths, this means 2,5 Liters per hour... assuming the bike runs roughly 90Km/h on WOT, this would mean the fuel supply would be roughly 2,75 Liters/ 100km - waaayyy to low!
we took the ped-cock off the tank, drained the fule, inspected the tank and the fuel and everything looked very clear and no sign of rust. Then we opened the ped-cock...
both holes were almost blocked (standard and reserve) and there was a little foam filter in it, that also was almost black!
Cleaning everything, we could now drain 100ml in 43 Seconds => 8,4 Liters per hour => gives roughly 9,6 Liters per 100Km at WOT
Problem is not 100% solved yet (I assume the float to be set wrongly) as it still cuts out and pings, but at least one cause is solved.
To bring a relevance to the Laverdas: I had fuel-supply issues at WOT with both the SFC 1000 and the Jota and have solved it on the Jota with a low-pressure fuel pump on the Keihin application (will do the same for the SFC as well as the Motoplast...). Before that, I drilled the holes and lines bigger in the ped cocks and do check for rust and dirt regularely on all filters...
So - pls. - if you go for WOT-runs regularely, do your bike a favor and check for that, please. It doesn't take much material to block this very small fuel supply bottle neck...
wasn't on a Laverda, but we had my dad's bike (old Triumph BDG 250H) completely dismanteled and restored the engine. However, on first tour, the bike started pinking after several kilometers and did cut out. you could re-start the bike right away, but with the same result (and the distance between stops got worse and worse...).
I took the fuel-pipe off the carburator and saw fuel almost just dripping out of the pipe...
at home, we measured the fuel flow with a simple method: took a beaker with a ml-scale and stopped time until 100ml went into it. Took us 2:23 Minutes! Doing the maths, this means 2,5 Liters per hour... assuming the bike runs roughly 90Km/h on WOT, this would mean the fuel supply would be roughly 2,75 Liters/ 100km - waaayyy to low!
we took the ped-cock off the tank, drained the fule, inspected the tank and the fuel and everything looked very clear and no sign of rust. Then we opened the ped-cock...
both holes were almost blocked (standard and reserve) and there was a little foam filter in it, that also was almost black!
Cleaning everything, we could now drain 100ml in 43 Seconds => 8,4 Liters per hour => gives roughly 9,6 Liters per 100Km at WOT
Problem is not 100% solved yet (I assume the float to be set wrongly) as it still cuts out and pings, but at least one cause is solved.
To bring a relevance to the Laverdas: I had fuel-supply issues at WOT with both the SFC 1000 and the Jota and have solved it on the Jota with a low-pressure fuel pump on the Keihin application (will do the same for the SFC as well as the Motoplast...). Before that, I drilled the holes and lines bigger in the ped cocks and do check for rust and dirt regularely on all filters...
So - pls. - if you go for WOT-runs regularely, do your bike a favor and check for that, please. It doesn't take much material to block this very small fuel supply bottle neck...
