as the title says I am after a twin Dellorto DHLA 40 manifold to suit a GX head, needs to have two bolt holes at the top of each runner and have oval shaped outlets to match the GX port shape
genuine CASH buyer

I went and picked up the engine today for $750.
The engine has had a rebuild before it was sold to the previous owner 2 years ago, since then it has been sitting in his shed under a plastic tarp and has been manualy turned over every month in an attempt to keep the internals coated with a film of oil.
The engine and head are fitted with new welch and coolant plugs, new gaskets for the intake and GX twin exit exhaust manifold. The intake manifold, air filter housing and twin hitachi SU type carbs are very clean and in original condition. I didn't buy the mikuni carbs because I was having huge dramas finding a spare parts shop for them, instead I am buying a pair of Dellorto DLHA 40 carbs for $270 and I will need to buy a manifold to suit them and the GX oval port A series head, so if anybody has one for sale, I'm your bloke! also if any body would like to buy the twin hitachi SU carbs, manifold and air filter housing, you know where to find them!

cheers for the advise I am really keen to start my first ever engine build up since I have only been spoilt by ridding fast japanese bikes which need nothing done to them! it will be great if I can build a neat 1200 engine and have good power from it as long as I don't lose the plot and go crazy with race parts! only 2 more sleeps whoooopeeee!

I am spewing I can't find a smokey A series engine because I have just done an estimate on what it will cost me to fully rebuild the A12GX engine all up with full bottom end (except crank) will cost me $300, competition valve springs will cost $75, full gasket kit is $83, new oil pump is $99.30, new timing chain and timing chain tensioner is $41.30, new water pump is $59.45, press bent 4-2-1 extractors are $178.20 (+$100 for mandrel bent) and I am not sure what the cam will cost me (either a 49/71 profile or a 54/70 profile) all up minus the camshaft it will set me back about $847 plus postage, and with the engine starting at $750 the price is creeping up a bit. I know the A12GX head has a swirl shape intake port so I don't think I should touch the intake ports but the exhaust ports can be ported out to match the extractors and the combustion chamber opened up a bit, the block could use a hone and decking too. Ahhhhh well at least she will be a reliable fun bus to run around in!

the engine is a genuine low KM (about 120,000km) and comes with factory everything such as B210 distributor, twin hitachi carbs, factory twin carb manifold, twin outlet exhaust manifold, all accesories like 12V coil, water pump, fuel pump, alternator and errr just about anything thats bolted to the engine. So what would the desired set of webbers be? I see on Ebay there is a pair of 40mm Mikunni carbs and manifold for $700 I think it's a bit rich though? and A guy in newcastle is selling a pair of 40mm dellorto carbs too I am guessing these will fit the A12GX intake manifold with perhaps an adapter plate?

update! I just got off the phone to the guy who is selling the A12GX engine and he will drop the price to $750 if I get up there this weekend. I will get up and buy it on Saturday then start the rebuild soon after. Now, should I get hypeuretic A14 pistons, wade cam with anti pump-up lifters, yella terra roller rockers, 36/32 webbers, mikkuni's b310 distributor jeeeeze I could go on for ever but any sugestions and tips will be very appreciated

I am in Bunbury western australia or should I assume I am wasting my money with a a12gx build up?

Hi everybody this is my first post and I am proud to say I recently bought a 1971 1200 coupe with 86,000 miles on the clock. The car is a great commuter and a solid performer considering it will chirp 3rd gear if I try hard enough!
But now I have been bitten by the dat rat and been looking for some more power! I have found a 1200GX power plant fitted with twin factory carbs for sale for $950 o.n.o. I am going to buy it and begin work on it next month. I was thinking of a wade cam for peak power between 3000RPM and 7500RPM, twin 40mm webers, 2 1/2 inch extractor system, rebuilt bottom end with 60thou oversized forged pistons, some more porting on the exhaust ports and a standard 10.1:1 compresion ratio maybe more if the head or block deck need a shave to clean them up what do you all think of my plan? and how much power would I end up with? place your bets people the spanners are about to twirl