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Re: Vespa PX 221 help
Posted: Sun Jun 14, 2015 11:00 pm
by smiffy1968
I'm taking the sat nav out tomorrow night. Give it some on the dual carriageway, see if i can hit 80mph / 128Kmh. I'll update tomorrow. Split my Lammy engine last night, in great condition. Old school 185 coming next. Cheers
Re: Vespa PX 221 help
Posted: Wed Jun 17, 2015 8:00 am
by Nik221
Great stuff, I have taken my delly off because it is so thirsty and I don't have the jets to jet it properly so I will wait to buy some in the UK. Another thing is that I bought the carb with the opposite side idle screw and mixture. Do you think I could jet it so it doesn't use more than 5.5 L on 100km? Because the difference in power is abnormal. Cheers
Re: Vespa PX 221 help
Posted: Wed Jun 17, 2015 10:39 pm
by smiffy1968
Errr. Not sure about that Nik. If your gonna tune a scooter i think looking for fuel economy is pointless. You either want to go fast, or slow and with good fuel economy. Sod the fuel mate, just rip the throttle open..........
Re: Vespa PX 221 help
Posted: Thu Jun 18, 2015 8:31 am
by Nik221
Haha your right. I will need a bigger tank then
when I said it was thirsty I meant 7L to 100km thirsty. I think that is a bit to much.
the power and speed is well worth the try though.
Re: Vespa PX 221 help
Posted: Sun Jun 28, 2015 8:56 pm
by smiffy1968
Hi Nik, how is the scooter runnng. Mine i took out today, cruising at 60 - 65Mph the temp gets up to 197c! Going to adjust the timing some more and go up to a 140 man jet. Cheers
Re: Vespa PX 221 help
Posted: Thu Jul 02, 2015 8:54 pm
by Nik221
Scoot is going great, so far so good
it is getting near my flight for London so i am sad for leaving her at home in the garage
i'll go mad not riding for two months.
Re: Vespa PX 221 help
Posted: Sat Jul 04, 2015 12:36 pm
by smiffy1968
Yes you will miss it. I took mine out on Wednesday evening, i hit 77Mph Gps at 8000 Rpm. It got hot, fuel flow through std carb issue. Will modify it today and test this evenng. The engine sounded bad so i pulled the clutch in and dropped the throttle, tickover was above 2500 Rpm for a few seconds then fuel flow caught up and tickover revs dropped back down to a normal 1500 Rpm. I will keep you posted. Cheers.
Re: Vespa PX 221 help
Posted: Sat Jul 04, 2015 12:39 pm
by smiffy1968
My gearing is a bit low at the moment. I am running 20/68 T5 primary's currently because of my rear tyre which is mahoosive! 165/70-10. So i have a 21T complete clutch to try and if not enough will get a DRT 22T primary from SiP.
Re: Vespa PX 221 help
Posted: Sun Jul 05, 2015 1:42 am
by Nik221
Bloody hell thats a big tyre
im getting ready slowly so just riding around untill i leave. Cheers
Re: Vespa PX 221 help
Posted: Sun Jul 05, 2015 10:22 am
by smiffy1968
It's been very hot here. Hopefully you will enjoy good weather when you get her Nik.