Vent for keyed cap question and Sachse ignition install

M

MotoV

Hero member
Any advice for clearing the vent on a gas cap with a key? It has a large protrusion in the middle on the inside and 3 holes that look like the vents- possibly blast some air through?
I took the 1200 our for a short run today after installing a Redax-Sachse ignition-alternator and after 5-6 miles I got a lot of popping and no power, which brought me to a stop. I opened the cap to check the gas situation and could hear a slight sucking sound - even after closing it again. The bike started up again and as I was struggling to get home it continued to have huge raucous backfiring, a lot of clutch feathering and much slower pace got me home.
The Sachse ignition ROCKS!!! When the bike was first out it pulled like a freight train. I have never ridden another Laverda that pulls like this...obviously this bike is relatively new to me but I've ridden quite few Laverdas. I've always liked 1200s but this is the first I've had with 4C cams high comp pistons etc. and I am impressed. I just removed a DMC ignition from it and the seat of the pants says the Sachse is smoother and the #4 curve just pulls harder than the DMC (can't remember which curve)
 
Basics first.
Try opening the cap next time it stumbles when riding.
If it improves then the cap is the problem.
Also check your fuel taps aren't blocked with clag.
Also check the filters on each carb.
Next would be the float valves and then float heights.
 
I will go through the basics listed above. The carbs have been ultrasonically cleaned and rebuilt...I will have to check the fuel taps but this is a recent development as it was runningwell a week ago. The amount of fuel in the tank is about 1/3 and I originally thought I ran out but that was not the case.
 
Also try turning the choke on next time it stumbles.
If it goes better then it's fuel starvation.
 
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