Maldonado, Polini or 150cc 5 port upgrade

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Maldonado, Polini or 150cc 5 port upgrade

Postby brianwar » Wed Dec 28, 2016 9:27 pm

Hello, anyone have views on which 125 2t performance upgrade is better option. I've read various reports was tempted to go for Malossi 166 but some reports state standard LML 150cc 5 port cylinder, head and piston is a good alternative. Looking for more power for overtaking and dual carriageway travel.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby rob h » Thu Dec 29, 2016 9:52 pm

I will not be popular, the genuine 150 5 port cylinder is a good upgrade giving more torque and speed especially on lml large ported engine case. But you want to travel on dual carriageways, you need more torque for the headwinds. You will get around 60mph with the 5 port depending on exhaust, but will be around 55mph in headwind. It is only a basic 150 cylinder with some mild porting and a good piston. It is the only one you can use on an lml standard crank with some hope of it lasting.
As soon as you add more cc to the cylinder you get more torque, most 177 just bolted on will give you 12hp with a bigger carb and decent exhaust . That is 60 mph and massively increased torque. The polini has massive ports and cylinder tuning aimed at low end torque, with cylinder case matching it can easily achieve 14 HP with the ability to tour in all weather. The malossi 166 is a rev band monster, with full porting and decent exhaust it will easily achieve 70mph but only by using the higher revving engine, you have to watch your engine temp.
I have an pinasco alloy 177 gran turismo, larger ports, their is the BGM 177 alloy and others, for high speed touring alloy is the most reliable.
But you would have to upgrade crank, bearings, carb, clutch and a decent exhaust to have a reliable high speed tourer. Hope this helps!
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby brianwar » Fri Dec 30, 2016 4:42 pm

Cheers Rob, your advice is very useful, I don't want something with a narrow power band, I'm to old to be revving the wotsits off it on every journey, Sunday morning rideouts keeping up with variety of other scoots is the objective.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby NICK » Fri Dec 30, 2016 7:33 pm

I've had the same 150 5 port on my 2006 non-reed since 2006! Apart from a blown copper head gasket,with a simmonni pipe it's been a proper p200 chaser. Cheers
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby rob h » Fri Dec 30, 2016 8:53 pm

Totally agree, I had malossi 166 mine did 75 mph, but very buzzy and noisy at speed. Had god's own tourer malossi 210, perfection for touring. But after a short time without a scooter, had on all my adult life suddenly missed one! Boy had the prices changed!
I built my scoots, one seize in 20 years on a 225 cast iron vespa, ridden by a mate trying to keep up with lambretta 225 ts1 over 50 miles!
I know have the pinasco 177 lml on large lml case ports, it really is the middle ground of kits. Alloy so no overheating or soft seizes, slightly revvy if you want to, pull away from low revs and cruise at 60 mph all day. Read my other reviews on the pinasco.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby Shari » Mon Feb 27, 2017 10:07 pm

With the 177 kit would the other parts stand up to the upgrade I. E crank
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby rob h » Tue Feb 28, 2017 9:13 pm

The LML are a quandary, in regards to cranks! The standard LML crank was designed for a 150 engine, after that it is a lottery. Up to 2010 with the big engine ported cases, a lot of cranks seized with any kind of upgrade.the problem was poor quality bearings on the crank. Mine went at 3000 miles with a 150 cylinder, now has a quality crank, COSA clutch, pinasco 177.
With the newer small ported casings, I don't know if the crank lasted better, I am not hearing about as many seizures as the smaller ports restrict performance slightly. Personally if you are on a standard crank, and small ports you are better going for the genuine LML 5 port cylinder. If you want to have a reliable performing tourer you must do decent crank, bearings and clutch. I have always done one quality rebuild and then rode without trouble for years.
Hope this helps.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby Shari » Wed Mar 01, 2017 5:25 pm

Hi, yes it does thanks.

I am on a last run LML. Only just got it so was thinking that instead of running in twice I may buy the 150 kit and put it on, thus killing 2 birds with one stone so to speak. I don't particularly want to do a rebuild so early. It's a question of how much the scoot will bed in over the run in period. At the moment it feels really tight and is not quick at all. I am wondering whether this will improve or I just go for the 150 kit now and hope the crank etc bears up.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby rob h » Wed Mar 01, 2017 8:00 pm

If you look at the listings for derestricting the standard 125 from Lml on this site, it will struggle to 50 mph max if totally restricted standard, it has euro restrictions for emissions and economy. If you modify the air filter on the carb, remove the under seat filter and upjet. Then change the restrictive exhaust it will accelerate a lot quicker, and give you about 55 mph max, around 50 cruising. The 150 conversion on small ports will give you torque, two up and into wind staying power, guaranteed around 57 mph top speed with a good exhaust. Some claim 60 mph using a 24mm carb and quality exhaust, which is not unexpected. Cruising will be around 55 mph in most conditions. This scooter was designed as a 150, downsized for the learner market, and is still sold standard as a 150 if you order one. Just make sure you get the genuine lml 5 port 150, it has a good piston with chrome rings. lots of cheap versions that are dreadful performers.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby Shari » Thu Mar 02, 2017 12:15 pm

Hi, thanks for the advice.

At the moment it is fully derestricted with a SIP Road 2 exhaust. I will have a look at the 150, 5 ports from Tasso. Looks like its about £180 for everything but the exhaust, including the jets, although they recommend a 98 main jet. Sounds too small but I will have a look around the site to see what is the best set up.
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Re: Maldonado, Polini or 150cc 5 port upgrade

Postby rob h » Thu Mar 02, 2017 3:56 pm

I ran a 3 port piaggio 150 which has small cylinder ports, not as good as lml 5 port, with sip road. loads of pulling power but would just touch 60 mph on a very good day. good for 55 mph.I am no lightweight. Difference was slow acceleration but constant to the brick wall feeling around 55 mph. 5 ports have much better acceleration, and slightly more top end.
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