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Post by allmodcons on Feb 20, 2012 18:18:50 GMT
Hi, I was wondering if anyone out there can help me before I spend any more money on trying to get this scoot scooting again.....  I have a 1998 Vespa T5 Classic with a malossi 210 piston and barrel fitted (everything else is standard). A couple of years ago it decided that it didn't want to start, I phoned turners scooter shop who collected the scoot and after examining it said that the rings were seized. They managed to remove the rings and said that they do not need replacing with new ones. They said I was using the correct oil so the only thought they had was it was because it had not been used over the winter. Everything was fine for a couple of months then it started to splutter and stall like it was being starved of petrol?? The compression seems fine so I don't think it's the rings this time, I have placed fresh petrol, stripped the carb, replaced the plug (spark is good), ht lead and cdi box but still no joy. Even tried the old trick warming the plug up and bump starting but to no avail.... So it spent the whole of last year in the garage because I spat my dummy and fell out with it. I have had loads of scoots since the early 80's and never had this problem. Do I go for a standard piston and barrel or buy a carb and exhaust to tune with the malossi barrel. Over to you guys and thanks in advance for any help. CJ. (Chester) |
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Post by kru251 on Feb 26, 2012 1:43:00 GMT
Being so simple (relatively) as long as a two-stroke has fuel/oil being injested into the barrel at the correct time with a spark firing at the correct time it should go. You say you stripped the carb. Were all the jets cleaned out with compressed air too? Sure fuel is getting through? New plug is definitely a good one? I ask as I once fitted a new plug and then engine ran but then petered out. Must be fuel etc. Cut the story very short it turned out to be a brand new plug that just broke down electrically when it got a bit warm. Absolutely fine when cold though. That was an all day trying to fix it job!!!
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Post by sbwnik on Feb 27, 2012 19:38:12 GMT
You can't fit a Malossi 210 to a T5. Totally different engines.
Other than that, without seeing the engine, it's a difficult one to diagnose. I'd start by stripping the top end and having a look inside though.
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Post by allmodcons on Mar 1, 2012 17:56:08 GMT
Thanks for the replies and apologies it's an 172cc piston and barrel. Right hears the latest- Bought a new plug but never made any difference, checked the main jet in the carb and it was fitted with a 116, I always thought this kit would need a 120 main jet or greater so i phoned a couple of scooter shops and they said a 116 should be fine. I explained the problem with the scoot and they asked what the old spark plug looked like and i explained it was black/fouled and they said to undue the sump nut and smell the oil to see if i could smell petrol as it sounded to them like the main seal had gone because this would cause the problem with it not starting. After checking the oil i "think" i can smell petrol but i am still not 100% sure?? To split the engine and replace the seals is going to be expensive and even if i do this what is stopping it happening again?? Does anyone know what could cause this to happen and do you agree this could be the problem as all the scooters i have had in the past this is the first time i have had this issue Cheers cj |
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Post by sbwnik on Mar 1, 2012 22:06:21 GMT
It's a common problem. Run the engine to warm, dump the oil into a container and smell for fuel, look for a cream coloured emulsion on top of the oil or signs of seperation.
Any of those and you've blown a seal (I know a joke about that) and it's strip down time.
Not a huge job, and it can be fixed without taking the engine out, although I prefer to drop mine out and put it in an engine cradle to work on. Much easier that way.
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Post by dave1967 on Mar 1, 2012 22:08:17 GMT
Hi
Sounds to me like you have been told correct, seals gone, can be caused by a number of things including just general wear. if you are ok with spanners its not a difficult job if you take your time, worth doing bearing at the same time. Only use genuine vespa seals and good quality bearings. personally I dont like 172 kits running with standard cranks some people will disagree but i know a few people that have had problems like yours.
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Post by sbwnik on Mar 1, 2012 22:12:52 GMT
Standard cranks are OK as long as you gas flow them. Not perfect but better than a stocker.
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Post by allmodcons on Mar 10, 2012 9:48:56 GMT
OK .. undone the sump nut and yes there is petrol in the oil  Ordered the parts and touch wood should be sorted by next week. I was thinking of fitting a decent exhaust at the same time, I have phoned up several places for recommendations for 172 mallossi kit but getting different answers Some say a Simonini, or Pinasco and a couple have said the Scorpion... Help  |
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Post by sbwnik on Mar 10, 2012 10:25:18 GMT
Spend as much as you can. If I had the money to spend, I'd be looking at a PM pipe, the others are fine, but a PM is usually a better bet. IIRC SIP do a good pipe for the 172.
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Post by allmodcons on Mar 11, 2012 9:07:53 GMT
Thanks sbwnik. Looks like the Pm 125cc - 172cc Evolution Expansion chamber is the way to go as i have read some good reports. Has anyone got one fitted ?? £190 is a lot to spend and i want to make sure i get it right
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Post by jackthekipper on Mar 11, 2012 15:28:00 GMT
yep....pm evo's are good  |
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Post by kru251 on Mar 13, 2012 22:51:17 GMT
Glad to know that you have a diagnosis; and seem well on the way to having a summer of fun coming!!!!
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