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Post by Hobbyhorse on Sept 18, 2018 9:14:24 GMT
I picked up the new output shaft and rear hub this morning, took the motor out and stripped it down. Happily the the bore and piston are good and I found nothing in there to be concerned about. New seals throughout to be fitted and I will take the gearbox bits to the local Vespa specialists tomorrow morning who will shim up the gears for me. With luck I will have more or less completed the assembly of the engine by tomorrow night and hopefully running on Thursday.
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Post by Hobbyhorse on Sept 6, 2018 19:07:08 GMT
I went through the scoot and it is mostly sorted however I did find the rear hub to be only finger tight and as result it now needs a new output shaft and hub. Scope creep comes in as pulling the motor down to do the job will mean new seals plus what ever else shows up. There is no such thing as a cheap scooter.
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Post by Hobbyhorse on Sept 5, 2018 19:36:10 GMT
I did think of it but discarded the idea .... my shed has quite enough rubbish in it already without adding to it with a wrecked Vespa, LOL.
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Post by Hobbyhorse on Sept 5, 2018 8:55:16 GMT
The frame was twisted and the front assembly was well bent. Just those two items were enough to write it off. It would have been deregistered and the costs etc in getting it certified again added to the costs for anyone contemplating a repair project.
I do not seem to be able to post a photo, of it.
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Post by Hobbyhorse on Sept 4, 2018 19:17:45 GMT
As the title suggests, I was knocked off my 1997 PX150 on Friday and scooter is a write off. I am not best pleased as it really was a keeper having had engine work done and a new front forks assembly fitted .... as they say it happens.
The good news is that I managed to find a very tidy 2003 PX200 with 16,000 ks on it for $500 less than the insurance payout. There are some things to sort out on it, but in general it is a runner however the $500 I have up my sleeve will soon be eaten up with the work required. Today will be gear change adjustment, oil change to gearbox, replace battery and try to find problem with the electric starter and above all, to insure it.
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Post by Hobbyhorse on Jun 6, 2017 9:16:04 GMT
The Vespa PX continued giving trouble and I finally did a leak down test and found a significant leak around the base of the barrel .... some shed time called for.
Bearing in mind that the scooter sat for 15 years in a storage container I presumed that the seals would be the main problem but of course things never go as expected. Firstly I found that there had been a decent heat seize in its short history (6000ks since new) and the piston and bore were bad. The fly side seal appears to have been done fairly recently but the clutch side was bad and had gone very soft. The Cosa clutch was well notched and not doing its job at all well, the gear shift cross and control shaft were poor and the crank was out of true ... well those were the main problems. There has been some very amateurish work done with the wavy washers being used under the head nuts without flat washers which carved into the aluminium causing poor nut seating and bending the head studs, not forgetting the wrist pin circlips being aligned incorrectly .....
I am happy with the power of the scoot and resisted the urge to put on a kit and have gone for a standard Piaggio 150cc barrel and piston, replaced the clutch with a standard one (not a Cosa), new seals etc, shaft trued up, end milled the head stud portion of the AL head to get a true surface to tighten on, and replaced the cross and control shaft.
I had bought the scoot as it was a good price and had only 4800ks on it in preference to one that had 25000ks. It really is a lottery buying second hand and I certainly did not win the lottery with this one. I figure this one is a keeper so hopefully I can recoup something from it all by getting use from it over time. Hopefully the flat spot I began this thread with has disappeared and with the new front end fitted to it several months ago I am looking forward to getting back on it again.
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Post by Hobbyhorse on Apr 14, 2017 4:27:14 GMT
Henri, glad to hear your birthday bash was a success ..... here's to the 51st.
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Post by Hobbyhorse on Jan 18, 2017 4:37:18 GMT
Not silly at all I would suspect. I live in New Zealand where it is supposed to be summer at the moment and a mate of mine with a PX200 went down from a B7HS to a 6 and it is apparently running smoother and with more power. Strange things, these two stroke engines.
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Post by Hobbyhorse on Jan 17, 2017 4:54:29 GMT
The plug chop will have to wait .... unfortunately.
The scoot was one that had sat in a storage container for something like 15 years and in that time the grease around the needle roller in the front hub had dried out and frozen the needles and as a result the non turning rollers had been sliding on the stub axle and worn it significantly. I took it to my local scooter shop to get the stub axle pressed out and replaced which then became a major when the aluminium suspension yoke cracked and broke. You win some and then you lose some!!
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Post by Hobbyhorse on Jan 13, 2017 8:30:24 GMT
Surprise surprise, the 45/140 turned up and I have installed it ... it is about 1 1/2 turns out in the optimum position and the I/4 throttle plug chop will be done this weekend.
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Post by Hobbyhorse on Jan 11, 2017 2:55:20 GMT
An update for you PXguru.
The Xmas break has slowed delivery but finally I managed to score a 45/160 .... I ordered a 45/140 but lets not go there at the moment. The main thing is that the problem is now sorted and the scoot is running well. I have just returned home after a 50k run on both motorway and city streets and it ran just fine. I also used your method of setting up the mixture screw .... 4 turns out and then start from there and it worked well for me.
Again thanks for your help.
Rhys
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Post by Hobbyhorse on Dec 19, 2016 20:05:43 GMT
I am still waiting for delivery of the new idle jet and have spent time reading up on the black art of jetting which has confused rather than cleared my mind.
If the smaller number is the fuel while the larger is the air and the ratio between them is the significant thing presumably by dividing the fuel into the air the resultant figure gives the overall effect 140 ÷ 45 = 3.11 whereas 160 ÷ 48 = 3.33 .... higher richer, lower leaner, or is that too simplistic.
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Post by Hobbyhorse on Dec 16, 2016 8:33:06 GMT
Again, thanks.
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Post by Hobbyhorse on Dec 16, 2016 2:41:36 GMT
Pxguru I have an apology to make .... I misread the numbers on the present jet and gave you the wrong information. Having taken it outside and into the sunlight I find that the existing jet is a 48/160 ....
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Post by Hobbyhorse on Dec 15, 2016 19:26:41 GMT
Thanks for that Pxguru, I appreciate your help.
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Post by Hobbyhorse on Dec 14, 2016 20:09:27 GMT
I am sure this has been covered a number of times but my search did not uncover the answer I am looking for.
I have a 1997 PX150 with 5000ks on it which runs well through the higher rev range and will make 95kph on the motorway but has a very annoying flat spot when coming off the idle. I have adjusted the mixture screw and all is well until the engine gets hotter after say 10k, at which time I have to stop and readjust the mixture. It takes almost no movement on the screw and the scoot is then good for a days run but the following day the same procedure has to be repeated. I am now looking at the idle jet which is the standard one at 48/100 and wondering whether a change here would help.
My question is which jet should I buy ... up in the numbers or down?
Rhys
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Post by Hobbyhorse on Oct 30, 2016 6:59:12 GMT
Gillie, I have not been able to load a picture for some reason. It is basically a piece of 25mm x 3mm aluminium about 300mm long with a 30mm section turned at right angles at the end and a 7mm slot cut in the upstanding piece.
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Post by Hobbyhorse on Oct 29, 2016 2:01:52 GMT
The PX was a bit hesitant at low revs, particularly when changing gear which, to me, indicated a tweak needed on the mixture screw. The 7mm nut in behind the starter motor is a bit of a devil to get at so: used a piece of 20mm x 3mm aluminium strap in which I cut a 7mm slot in the end and bent that at right angles and I now have an offset spanner. The mixture adjustment did the job and the scoot is going well.
I am sure this is not the first time it has been done that way, the main thing is that it worked.
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Post by Hobbyhorse on Oct 27, 2016 19:59:32 GMT
Thanks guys.
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Post by Hobbyhorse on Oct 27, 2016 5:07:09 GMT
I have just bought a 1997 PX 150 Vespa after having had good experiences with my existing 1988 Vespa 50s. I am of course enjoying the extra power but I will hang onto the 50s for while yet just because I like it. I have been doing a lot of lurking on both this site, and the small frame site and have picked a lot of very useful information in the process. My thanks to the unwitting providers.
I recently did the Trans Alpine Scooter Safari which involved riding the 50 from Christchurch (NZ) 250Ks over the mountain passes to Hokitika as a Cancer Society fund raiser .... 250 small scooters plus support crews and collectively there was NZ$191,000 raised .... all good. There is another small scoot event in March next year riding from Wanganui, over the Desert Road and on to Taupo, some 270Ks, and again in aid of cancer research etc. The plan is for me to ride the 50s while my daughter will ride the PX and just possibly my son will be in NZ and ride my 64 Honda 90 ... a sort family team event.
Again thanks for all of the information which is daily provided on all things Vespa.
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