Quattrini which exhaust

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ducksta
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Hi guys just changing a few things round on my scoots running a quattrini on a Bgm big bore box exhaust need the exhaust for my other scoot looking for a good up grade any ideas
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mick1
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Think you need to give a bit more info'

Which Quattrini kit, gearing, Carb', port timings, crank (stroke/rod length), etc

and what do you want from it........more torque, more top speed, touring (what does that mean ?), etc
ducksta
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M1xl. 28mm power jet delorto ported cases standard gearbox with 22 tooth Costa clutch 57 mm stroke
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ducksta
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Bad spelling lol
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cartmel808
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Main scooter: 1975 Vespa Rally 200 Femsa
Location: Durham, England
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I've tried 3 different pipes on my m1xl - sip/jl curly, quattrini m3px & pipe design bullit...
The sip curly is a nice torquey pipe, but only revved to 7k & I always felt that it was holding the kit back... the quattrini pipe added approx. 2.5bhp, moved everything approx 1500 rpm up the rev range letting the motor rev to 8.5k... but the pipe design bullit is imo the best matched pipe for this kit - the engine instantly felt notably stronger right through the range running this pipe & it really seemed to unlock the full potential of the m1xl kit.
My spec is; M1xl, 57mm full circle crank, 30mm phbh, hip v4 adv/ret cdi, standard gearing with 22t clutch & 65t primary.
ducksta
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What's a hip v4 and would you sell the quattrini pipe?
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cartmel808
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Main scooter: 1975 Vespa Rally 200 Femsa
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Should read HHPv4 (predictive text)... & gonna hang onto the quattrini pipe...



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ducksta
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Hhpv4 where can I find details is it like a mtec
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cartmel808
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Joined: Tue Feb 04, 2014 10:35 am
Main scooter: 1975 Vespa Rally 200 Femsa
Location: Durham, England
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SIP sell hhpv4... 4 pre-set ignition curves - set @ 0 for quattrini.


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Knowledge
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Location: Ipswich
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HHP V4 has four curves, which are equivalent to Agusto 6000, 7000, 8000 and Vespatronic.

I have one fitted to my Lambretta and it gave good, but surprising, results. The best performance was on the Agusto 8000 setting, which was not a box I would have considered for my rather low-spec 200.

HHP are about to launch a new version of their CDI, with eight curves and an output wire for a rev counter.
Martin
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