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PM Tuning Apr 1984 - Barrel and Head

Need help with a tuning kit, how do you tune your scooter, which kit should I choose, and all general tuning and modifcations questions are for in here.

PM Tuning Apr 1984 - Barrel and Head

Postby Roey99 » Thu Aug 15, 2019 3:30 pm

Hi.
I've discovered an interesting barrel and head at the bottom of a box of bits that came with an old scooter.

It looks to me like a standard iron barrel that has been tuned, the engraving says " PM Tuned - Apr 84 - SP"
The exhaust port looks about 42mm and a standard big bore gasket seems to fit well.
The inlet port has stud centres about 64mm
The barrel is aprox 66mm bore.

It will need a clean and at least a hone, there aren't any ridges or lips to remove it just looks a bit rusty.

Which inlet manifold would work best if I wanted to use a non reed valve set up - or is it tuned for a reed valve ?

The head seems to be matched and has a rather interesting message etched into the under side - heaven only knows why this was added !

Worth keeping and fitting ? or put it back in the box ?

Thanks for your help - jr

IMG_0193.jpeg
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Last edited by Roey99 on Thu Aug 15, 2019 3:45 pm, edited 2 times in total.
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Re: PM Tuning Apr 1984 - Barrel and Head

Postby Roey99 » Thu Aug 15, 2019 3:32 pm

Another couple of photos :-)
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Re: PM Tuning Apr 1984 - Barrel and Head

Postby Cgt75b » Sun Aug 18, 2019 10:50 am

That’s some inlet!
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Re: PM Tuning Apr 1984 - Barrel and Head

Postby dickie » Sun Aug 18, 2019 7:50 pm

I'd go out of my way to sell it to someone from Scotland. :D
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