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Leotech wrote:Yeah, my mates only new to this so didn't want to spunk 500 - 600 quid on a kit if he didn't enjoy riding the Lambretta.
We were told the engine had been rebuilt before we bought the scooter but, as usual, we were lied to. The last time it saw a spanner was 1969 when it left the factory so his budget was already stretched to more than he wanted to spend. We did buy it as a recent import which had been "restored" in Italy.
I used a 150 head modified to suit the larger piston so the studs are reasonably well lined up and just through holes as opposed to slots.
We'll see how it goes. it was raining today so I didn't go out on it. maybe tomorrow after Ive fitted a new clutch kit!
Steve J wrote:It's also possible to use a 200 head without the problems of slotted holes or bent cylinder studs. Get the stud holes plugged in the 200 head, and re-drill them in the 150 pattern. I did something similar years ago when fitting an Li head to an LD, absolutely no problems. It's also mentioned in the old 'Lambretta Manual of Performance Tuning and Conversions' - Page 38 for the anoraks amongst us.....
Post by Leotech » Fri Nov 04, 2016 8:16 pm
I can modify the 150 head in my lathe but I can't alloy weld to plug the 200 holes or spot face it etc to suit the 150 studs, I guess we all do whats easier for us.
Adam_Winstone wrote:Interesting to bring this conversion back onto people's radar as we were talking about this old school conversion at the weekend; 5-Nations, Caernarfon, as I've been running one since before the Belgian Euro last year. I've been running the bike regularly since, including W-S-M national, Belgium again for Wassland, , faultless again this weekend, with a mix of road class and hundreds of motorway miles.
Ok, this offers no performance gain over the standard iron 200 that the cylinder came from but it has proven its reliability. FYI the bore is currently out at 66.8mm which shows at least 3 rebore oversized possible, with the thin spigot still coping.
Nothing special, no performance gain over plenty of the smallblock kits but an option and I thought I'd add a little feedback to this thread.
Adam_Winstone wrote:Interesting to bring this conversion back onto people's radar as we were talking about this old school conversion at the weekend; 5-Nations, Caernarfon, as I've been running one since before the Belgian Euro last year. I've been running the bike regularly since, including W-S-M national, Belgium again for Wassland, , faultless again this weekend, with a mix of road class and hundreds of motorway miles.
Ok, this offers no performance gain over the standard iron 200 that the cylinder came from but it has proven its reliability. FYI the bore is currently out at 66.8mm which shows at least 3 rebore oversized possible, with the thin spigot still coping.
Nothing special, no performance gain over plenty of the smallblock kits but an option and I thought I'd add a little feedback to this thread.
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