exotic cylinder conversion mystery ?

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
Post Reply Previous topicNext topic
holty
registered user
Posts: 908
Joined: Wed Jul 15, 2015 11:52 pm
Main scooter: lambretta gp
Location: east yorkshire
Contact:
Contact holty

Hi folks,
just bought this engine casing, its had an non standard lambretta cylinder fitted, been welded up and machined nicely, was told it was a rotax, might anyone have any information, or parts or ideas of parts to use, etc. Ive measured the hole for the spigot and its 75mm diameter if that helps, looking forward to learning a bit more on this if anyone can help, thanks in advance,
holty
Image
Image
Image
Top
User avatar
newmanlammy
Dealer
Posts: 118
Joined: Fri May 08, 2009 12:51 pm
Main scooter: Animal worldwide freeride
Location: chesterfield
Contact:
Contact newmanlammy

Looks like a Harry Barlow conversion for a 260cc to me
Top
holty
registered user
Posts: 908
Joined: Wed Jul 15, 2015 11:52 pm
Main scooter: lambretta gp
Location: east yorkshire
Contact:
Contact holty

newmanlammy wrote:Looks like a Harry Barlow conversion for a 260cc to me
would you know what cylinder was used maybe ?
holty
Top
User avatar
T5-190
registered user
Posts: 573
Joined: Thu Jan 08, 2009 3:25 pm
Contact:
Contact T5-190

Could be a PM Tuning MIG conversion from the 80's. I think they used a Kawasaki KX / KDX 250cc top end. I'm sure PM Tuning would have a list of engine numbers used.
Top
mick1
registered user
Posts: 1292
Joined: Sun Dec 04, 2011 7:43 pm
Main scooter: Li Avanti 225
Location: York
Contact:
Contact mick1

my mate has one of the PM conversion and that uses a Kawasaki barrel, a very similar mod' to the above picture.
Top
Adam_Winstone
registered user
Posts: 1693
Joined: Tue Jan 31, 2012 8:54 pm
Main scooter: Lambretta GP
Contact:
Contact Adam_Winstone

How big was the transfer area of the Challenger barrels? Didn't Harry Barlow start this project and flog it on to Chiselspeed before he went to the States?
Top
Ken Tucky
registered user
Posts: 41
Joined: Thu Jan 08, 2009 10:48 am
Contact:
Contact Ken Tucky

Adam is correct.
I had one on my sprinter years ago, until I totalled it at Shakespeare County Raceway, commonly known as Avon Park.
99 mph seize up through the timing trap - smashed piston/scrap barrel/bent rod - skid mark on track and in underpants.
You are now wiser but 'barrelless' if there is such a word.
Richard
Top
Ken Tucky
registered user
Posts: 41
Joined: Thu Jan 08, 2009 10:48 am
Contact:
Contact Ken Tucky

Addition to above post - Should have said Adam is correct it is for a Challenger Barrel - well, it looks identical to how my crankcase mouth was.
Richard
Top
Adam_Winstone
registered user
Posts: 1693
Joined: Tue Jan 31, 2012 8:54 pm
Main scooter: Lambretta GP
Contact:
Contact Adam_Winstone

Am I imagining it or did I see somewhere that these barrels were being manufactured again, if only on a small scale for private use? It might be worth asking Chiselspeed about it.

Adam
Top
stokky
registered user
Posts: 128
Joined: Mon Feb 23, 2009 12:14 pm
Contact:
Contact stokky

Don't believe its a challenger.

I had a challenger until about a year ago, my transfers where no where near that big.

Check out Bob Monkhouse on FB, he's having a go at making some Challenger II barrels

Some good photo's and videos of what he does
Top
Post Reply Previous topicNext topic

Return to “Lambretta Tech”

  • Information

  • Who is online

    Users browsing this forum: No registered users and 25 guests

Powered by phpBB™ • Design by PlanetStyles