SHAFT SEAL as false air reason is FAKE INFO, it is indeed rarely the seal ( sry guys ;) ) 8 other potential reasons first. let me explain you why. for a LONG time on my mind, this very important guide, as its a) a widely spread problem & b) good proper tips how to fast solve it are rare/ not existing. the fast shot: shaft seal is the reason is mostly WRONG! yes indeed. it rarely is. if using a good seal and applying it correctly it never dies. a lot of other parts do go bad before that.
THATs why its time for a proper step by step false air problem solve guide.
part 1: at an engine on a table 2:13
part 2: engine still in a frame 15:42 (different order at the beginning 1&2 is switched, planned it the other way round but i think this way it works better for you)
the potential reasons are in the order you should step by step check it. solving a problem, best thing is fault exclusion: ensure step by step that this potential reason is NOT the case. at a certain point you got the real cause. (rarely it comes alone...)
The potenial reasons with direct links (part 1/2) 0:10 intro
1) wrong set carb: 2:57 / 17:16
2) fuel supply troubles: 3:44 / 16:55
1,2,3 fuel guide: • THE ultimate VESPA 1,2...
the SI 2,5mm mj bore: • vespa FUEL BORE wideni...
SI carb explained: • vespa SI CARB: fuel su...
3) loose carb casing: 4:28 / 18:09
4) uneven carb/casing: 5:48 /
si carb sandpapering • vespa SI CARB sandpape...
5) leaky cyl head: 7:05 /
always sandpaper everything & use sealing mass
doesnt matter which one, as long as it can stand 300°
6) leaky cyl foot: 9:08 /
7) loose port epoxy 11:12 /
8+9) stator & crwnk seal: 12:12 /
the LIST: 14:56
#vespaTUNING #falseAIR #leak
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DISCLAIMER: the information shown in this video, is about THIS specific hardware. it is my personal observation documented with this video. It DOESNT automatically mean, that all such parts by this producer or seller do have or will have same issues.
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