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Fast n Furious wrote:If You're upping the engine..... that speedo wil have to go too Rich......
shane BBoys wrote:Dickie I’m sure so said that you would not be doing another?
bsso78 wrote:I’d leave it completely alone. There aren’t that many left like that and as soon as it’s messed with it’s just another series 2
Warkton Tornado No.1 wrote:With your porting skills I'd suggest you need look no further than an over-bored OEM barrel -or an SR type barrel if you have many hours & patience - with a piston to suit from the Grampian catalogue. With a wise crankshaft selection, preferably longer stroke, longer rod & packing to suit, you can dial in your desires.
Air filtration is the civilised way to go, but @ the very least a better, more capable elbow/bellows will be in order. You might get away with a re-engineered OEM filter box.....
Carburation? Aha! PWK are filter friendly & do not cause hot start issues. They need checking out/blueprinting like every make of carburettor, but they are a joy to work with IMO.
The exhaust may as well be a DIY clubman. That way you can control the ''U' pipe & tailpipe sizes & even AV mount.
Retain points ignition (for reliability ) but go for a 'J'/Luna flywheel on a GP boss. Screwed on, not riveted......the boss will take an M6 tap & buttonheads are neat. Upgrade to 12 volt though. Do you know any good Sparkies? Is that an oxymoron?
A mate built a 200 engine along similar lines. He even set ignition @ 21 DBTDC. It was an absolute joy to ride.
Front brake? Well, what DON'T you know about inboard discs? Though a TV175 S2 drum brake would suit
Storkfoot wrote:Tyres wise, I like the Scooter Center Michelin ACS copies. Yes, they are old tread pattern but with a three ply sidewall. They suit an original Lambretta. I can’t yet give you a full road test, having probably done less than 20 miles on mine
bsso78 wrote:I had a series 2 a few years ago and it was untouched and completely standard apart from a series 3 exhaust and it actually went quite well
dickie wrote:Warkton Tornado No.1 wrote:With your porting skills I'd suggest you need look no further than an over-bored OEM barrel -or an SR type barrel if you have many hours & patience - with a piston to suit from the Grampian catalogue. With a wise crankshaft selection, preferably longer stroke, longer rod & packing to suit, you can dial in your desires.
Air filtration is the civilised way to go, but @ the very least a better, more capable elbow/bellows will be in order. You might get away with a re-engineered OEM filter box.....
Carburation? Aha! PWK are filter friendly & do not cause hot start issues. They need checking out/blueprinting like every make of carburettor, but they are a joy to work with IMO.
The exhaust may as well be a DIY clubman. That way you can control the ''U' pipe & tailpipe sizes & even AV mount.
Retain points ignition (for reliability ) but go for a 'J'/Luna flywheel on a GP boss. Screwed on, not riveted......the boss will take an M6 tap & buttonheads are neat. Upgrade to 12 volt though. Do you know any good Sparkies? Is that an oxymoron?
A mate built a 200 engine along similar lines. He even set ignition @ 21 DBTDC. It was an absolute joy to ride.
Front brake? Well, what DON'T you know about inboard discs? Though a TV175 S2 drum brake would suit
Interesting ideas there. I have a sr175 cylinder bored out to match a 64mm Mitaka piston. The porting it needs is beyond my skill levels and tools but wouldn't take much from one or two clever folk that I know. I'd completely forgot about this option!
I have a 25phbl lying around and a series 3 airbox gutted, with a bgm mesh filter. It also has 4 x 35mm holes in it, which means it gets plenty of air, albeit warm from under the panels. I've just sold a crank that would have been perfect at 60/115. I'm not sure what flywheel you mean, but I have an af light one that I could fit a gp points boss into. I much prefer full DC ignition but that means lots of modern looking stuff, which while it's under the panels is still not very nice.
For the front brake, I think I'll stick with drum and possibly reverse pull, although again, I'm not ecstatic about the aesthetic side of that.
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