Weird Dellorto float defect

[SED]

It took me years to find it so maybe this will help someone.  

This is on PHF 36s from an LMIII, but it seems possible on any similar float.  Old style black floats with steel pivot.  

One float is attached to the steel pivot 2-3mm too close to its axis of rotation.  Consequently the float hits part of the carb body when the float level is adjusted correctly.  The result was popping through one carb when cold.  

Does anyone have a good black plastic float they'd like to sell?    :BEER: 

EDIT to add photos:
Top photo shows the long side (same as other float).  Lower photo shows short side.

[dilligaf]

It took me years to find it so maybe this will help someone.  

This is on PHF 36s from an LMIII, but it seems possible on any similar float.  Old style black floats with steel pivot.  

One float is attached to the steel pivot 2-3mm too close to its axis of rotation.  Consequently the float hits part of the carb body when the float level is adjusted correctly.  The result was popping through one carb when cold.  

Does anyone have a good black plastic float they'd like to sell?    :BEER:

You are kidding - right.  :BEER:
Matt

[Antietam Classic Cycle]

There's a pair of used ones on eBay: http://www.ebay.com/itm/76-Moto-Guzzi-V1000-V-1000-Convert-carb-carburetor-floats-right-left-/271636769532?pt=Motorcycles_Parts_Accessories&hash=item3f3ed02afc&vxp=mtr

[dilligaf]

Do a search for "floats" in the search engine.  This following should get you started'
http://wildguzzi.com/forum/index.php?topic=71014.0
http://wildguzzi.com/forum/index.php?topic=66487.0
 :BEER:
Matt

[SED]

I take it Matt's keeping his!   ;D

Charlie, Thanks for the link, but are they the same floats?  Mine are marked 7540.1 while the Convert floats in the ad are marked 7480.1 (I think!).

Thanks,
Shawn

[SED]

Matt, the white ones are the sinkers - right?

[Antietam Classic Cycle]

Charlie, Thanks for the link, but are they the same floats?  Mine are marked 7540.1 while the Convert floats in the ad are marked 7480.1 (I think!).

Likely a difference in the weight only, but fit is the same. The eBay ones are 10 grams, what are yours? 7.5 grams?

New 7.5 black floats here: http://www.dellorto.co.uk/merchandise/products_details.asp?PartNo=7450B&CategoryID=2&PartsectionID=21

[SED]

Mine read 10g.  I thought the part number was what was cast into the float so unless I copied the number down wrong isn't it a different float?

[Antietam Classic Cycle]

Mine read 10g.  I thought the part number was what was cast into the float so unless I copied the number down wrong isn't it a different float?

The eBay floats are from VHBs, but PHFs and VHBs use the same float - same part number.

[SED]

The eBay floats are from VHBs, but PHFs and VHBs use the same float - same part number.

Thanks - good info!

[dilligaf]

Matt, the white ones are the sinkers - right?

Mine are.  However it is starting to look like I have a fix.  Stay tuned.  :BEER:
Matt

[SED]

Mine are.  However it is starting to look like I have a fix.  Stay tuned.  :BEER:
Matt

Great.  Seems like a dip in some tank sealer would work.

Thanks!

[dilligaf]

Great.  Seems like a dip in some tank sealer would work.

Thanks!

Maybe.  My first attempt lasted 6 months and 1200+ miles.  Not sure how this latest fix is doing. All detailed here.
 http://wildguzzi.com/forum/index.php?topic=66487.0

 :BEER:
Matt

[Greg Field]

Don't be so sure that is the problem. Three times I've seen the "neck" pull away from the body of the float-needle valve. Two were on Guzzis, and the third was on a BMW R90S. Pull both needle valves and compare them against each other and against a known good one. The running condition this causes will drive a person nuts. Been there three times.

[SED]

Don't be so sure that is the problem. Three times I've seen the "neck" pull away from the body of the float-needle valve. Two were on Guzzis, and the third was on a BMW R90S. Pull both needle valves and compare them against each other and against a known good one. The running condition this causes will drive a person nuts. Been there three times.

Thanks for the tip Greg.  I will look for that in the future, but twisting the float so it wasn't hitting the carb body definitely solved the running problem.

[Kiwi_Roy]

Bump No 2

[SED]

Do the older brown plastic floats survive ethanol gas?


Thanks,
Shawn

[dilligaf]

I take it Matt's keeping his!   ;D
Thanks,
Shawn

Sadly, no.   :o I had been reading on the forum how great Pine sol was as carburetor cleaner and as I was bored and looking for something to do I decided this was a good time to clean the carburetors on the LeMans. The thing had always, as far as the plugs went, run rich and I was sure the black floats were heavy and the white ones looked so pretty I just couldn't resist and chucked the black ones.  Plugs still look rich.   :pop Anyway it would appear tank sealer has done the job.  ;-T   :BEER:
Matt 

[Charles in Lake Charles]

In my many years as a Guzzi owner, I've only had one black float fill up with gas after 37 years.

[Antietam Classic Cycle]

Do the older brown plastic floats survive ethanol gas?

All of the original floats "survive" pretty well. A small percentage will eventually fill up with gas, but they did that even before ethanol was added to the fuel.

[SED]

All of the original floats "survive" pretty well. A small percentage will eventually fill up with gas, but they did that even before ethanol was added to the fuel.

Charles and Charlie, thanks for the info.  Excellent! 

And Matt, your story is reinforcing my packrat tendencies! 

This forum has the most helpful and knowledgeable people - a wonderful resource.
Shawn