Griso fuel tank fittings: 1100 and 1200 differences

[belfastguzzi]

Fuel (petrol/gasoline) tanks.

 

I experienced great difficulty in attaching the drain pipes to the Griso tank, as they are so short and tight. There is general agreement that access to the fuel lines on this bike (and so access to the 'quick-release' fitting) is tight as well.

 

Looking at a parts diagram today, I was surprised to see that the drain hoses are much longer than mine. Then I noticed that the drain unions themselves are in an entirely different position. I had the 1100 tank diagram.

In the diagram for the 1100 Griso, the outlets are in the bottom-forward part of the tank.

On my 1200, they are in the bottom-rear of the tank so creating the problematic shortness and difficult access, obstructed by the frame, when trying to get the hoses connected to the unions.

 

_____________

 

I've just found the 1200 diagrams:

everything is different.

Drains / vents and the fuel pump hose assembly

 

American-type(?) arrangement, G1100

 

Griso 1100 --------------------------------------------- and the 1200

* Though my hoses are still much, much shorter than this diagram shows. The actual arrangement is different. Outlets are placed as shown, but hose legths to T connector are much shorter and asymmetric.

 

These are the vent hoses, pulled out as far as they will come.

 

If you can make this out, it's underneath the tank. Two unions facing to rear, which the hoses push onto (if you can get at them.

 

1100 fuel pipes

 

and the 1200 assembly

[belfastguzzi]

I'd guess that the changes may be because there is so little room between the tank and the 1200 engine/alternator,

so the protruding parts had to be relocated?

 

I've said before how the tank is so close to the engine that it actually sits on it in places, sandwiching cables and, on my bike, rubbing through the +ve live cable from the alternator.

Grey tape around +ve cable where it is worn through to bare live wire.

 

Main areas of tank pressure on cables and hoses, including pressing both coil feeds between tank and cylinder heads.

I taped the frame where it is worn through to bare steel and have taped extra onto the rubber support (at photo top) as it plainly is not supporting the tank high enough.

[The Monkey]

Raise that tank! You are replacing the fuel line and quick releases with non stock anyway right? Proper fuel hose(not stock) with enough slack and some other source of quick release that agrees with your hands should end these ails. Lots of different manufacturers of quick release fittings out there. Source out some deeper bumpers for the tank to rest on (Jap centre stand bumpers?) and cut em down to suit. Typical Italian, neat idea, just not executed well. Good luck!

[belfastguzzi]

I know that in the grand scheme, this is an insignificantly minor matter: but just for documentary interest, here are a few more pics relating to problems with hoses and routing.

 

Taking the battery out, it is clear that it didn't really matter that the drain/vent lines were not connected to the tank – because the drain hose was squashed completely flat anyway. It was between the battery and airbox. So even if there was some free length to help in getting the short hoses connected to the under-tank unions, there would be no free-play to pull them through. (And there wasn't.)

 

The lesson must be:

after purchasing a bike, take the tank off and check the routing of all hoses and cables. Re-route or even replace as necessary. This could save you, or a mechanic, having unexpected problems in the future. It could save a broken fuel outlet elbow!

 

 

Flat drain hose

 

Below, you can see the horrible, thin and brittle plastic fuel line used on the 1200. Again, it is very short and tight.

You can see that the lengths of both the drain and the fuel lines as fitted are nothing like the lengths shown in the parts diagrams.

 

 

 

Route of fuel line from throttle bodies at either side, to fuel tank.

 

Compare actual tank drain hoses > with much longer lengths here >

 

 

and fuel line

[gstallons]

That fuel tank should be reinstalled with somone's testicles in place of the fuel line pinch!

[GuzziMoto]

Just going off of memory (which is questionable, I know), as I recall my Griso 1100 (US version) has the tank overflow and vent line coming out the back of the tank. I could be wrong but it is too cold and snowy to go look right now. But if you care I can check after it warms up.

I re-routed the lines and got rid of the one way valve and canister.

[Wilf]

Fantastic workshop manual pictures and information in this thread, thanks.

 

I'd love to get my hands on a pdf of the workshop manual - unfortunately the link here is knackered.

 

Would someone be able to send me a working link or the manual please?

 

Best regards, Paul.

[antonio carroccio]

well done BFG

[Paul Minnaert]

here it is Paul www.guzzitek.org/gb/ma_us_uk/1200/