Long story short popped on 150 barrel derestricted it. Tired of hand hovering over clutch awaiting partial seizures. Left 150 barrel on removed sito exhaust and put on restrictve air filter and px cat exhaust system with the other emission doobie on it. Set carb up to USA spec as per Haynes manual and lml for jetting. No more seizures. Bit slower but probably same power as 125 derestricted. Now my question is there anyone out there who have derestricted an lml 150 as I know there are similarities to the Vespa px one being px is rotary valve and porting differences and quality and lml is reed valve and slightly different on the ports I am told. Don't want to go changing to a bigger kit but would like someone with more knowledge than me who knows about jetting so I don't have to worry about seizure's on long trips. Thank you
Last Edit: Sept 30, 2019 18:51:36 GMT by vespaclone
I've had a 150 reed LML straight from Eddie Bullet (remember him?). Sito+, drilled air filter, it was a fantastic scooter, one if those you wish you'd kept. Never had a single issue with it, even on motorway runs and it had the standard 21 tooth clutch in too.
I have a 1999 150 but this is more like a Vespa (which it mostly is) i.e. small ports and 3 port barrel, a great scooter.
You shouldn't have any problems if it's set up right
Serial scooter rider...
VMSC Committed to Scootering for 25 years
In theory you should not sieze or overheat the engine if the piston/bore clearance is correct and the ring gap also correct and the carb set up properly, this may mean a rolling road carb set up to ensure mixture correct throughout the rev range. Remember I started this off with "in theory"