Topic: vintage EFI for cb500/550? news to me!

[alacrity]

check this out... anyone ever try one of these?

http://www.ebay.com/itm/Honda-CB500-CB550-Vintage-Posa-Fuel-Injection-Manifold-/261778461843?pt=Motorcycles_Parts_Accessories&hash=item3cf3365493&vxp=mtr

[flybox1]

search POSA here on the forum.  quite a few threads....

[strynboen]

yes,, terry down under have tested them...not positive test

[Garage_guy_chris]

Just so you know this isn't EFI (electronic fuel injection) its some form of mechanical fuel injection. It is indeed interesting and havent seen it before and would love to learn more about it.

[Don R]

 Needs a mechanical fuel pump.

[Retro Rocket]

If I remember right, its biggest problem was the outer 2 cylinders running lean due to the design of the manifold..

[Muckinfuss]

Unless you're opening a museum, save your money.

[Rookster]

It does not need a fuel pump and it isn't truly fuel injection.  It is more like a large carburetor without a float bowl.  It is gravity fed.  Very similar to Lake injectors.

Scott

[strynboen]

 does it
have a vaccum melbran pump like a thainsaw kaburettor ??

[jaguar]

Mine.

[strynboen]

nice alu manifold...take the POSA off..and put an nice kaburator on instead..and you have a nice setup..

[jaguar]

I have had single and dual Posa Set ups on CB750s before.
Interesting to say the least.

Never seen one for a 550.
Figured it is just what my chopper needed.
Probably paid to much for the novelty, but it will be fun.

But when then again maybe not.  Someone paid $150 for just a manifold
http://www.ebay.com/itm/Posa-Fuel-Manifold-Carburetors-/251736705406?pt=Motorcycles_Parts_Accessories&hash=item3a9cad497e&vxp=mtr

[jaguar]

And for something that is mildly rare, they do seem to pop up.
http://www.ebay.com/itm/Vintage-POSA-4-1-Intake-and-Injector-Carb-for-CB750-SOHC-Chopper-Bobber-Cafe-/321661292794?pt=Motorcycles_Parts_Accessories&hash=item4ae481d0fa&vxp=mtr&nma=true&si=b4fVk%252BupnKkJ%252BCXbflcROcWQWVc%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

Think it is a case of the part being rare, and the person that wants to run one also being rare.

[strynboen]

yes  it is  Rare

[jaguar]

Yeah, there are more then a few concessions that need to be made to deal with these.....

[strynboen]

 it musthave a seperat idel kontroll..vaccum is too unstabill to regulate the fuel direkt..even the needel are turn to regulate the flow..or hov are it funktion...trhainasv have a low idel and a full speed adjusting..and not so mutch betveen..but a mc need to variabel  and pull in all rpm..its not so simpel to make work..