Tue Feb 04, 2014 11:34 pm

Addicted
Joined: 01 Jan 2012
Posts: 629

 
Addicted
Joined: 01 Jan 2012
Posts: 629

Tue Feb 04, 2014 11:34 pm linkquote
I didn't read this whole thread so don't get pissed if this is old news to you but some it might be new.

"I you have an sip fast flow tap you need to change the 4 hole gasket . The one the tap has installed has a lip around each hole that eventually tears off and ends up blocking the fuel flow causing your bike to run lean at full throttle." - Gran Sport

good and bad parts = top is good & bottom is bad (comes in the SIP tap):


Wed Feb 05, 2014 2:39 am

Molto Verboso
Black 2007 PX200, Dark green 1986 PX225 Pinasco, "1972"(yeah rite) Tangerine px200, several TRIUMPH TIGRESS SCOOTERS
Joined: 16 Jul 2010
Posts: 1082
Location: New Zealand
 
Molto Verboso
Black 2007 PX200, Dark green 1986 PX225 Pinasco, "1972"(yeah rite) Tangerine px200, several TRIUMPH TIGRESS SCOOTERS
Joined: 16 Jul 2010
Posts: 1082
Location: New Zealand
Wed Feb 05, 2014 2:39 am linkquote
Cheers mate, i just spent an hour to turn it around, took it for a spin and no leaks. The lips make it prouder (vain tap) but what can you replace it with?

The width is wider that a stock one, would a stock gasket work asa replacement?

Cheers
Wed Feb 05, 2014 4:57 am

nothing at all
Joined: 14 Nov 2008
Posts: 9657
Location: westla
 
nothing at all
Joined: 14 Nov 2008
Posts: 9657
Location: westla
Wed Feb 05, 2014 4:57 am linkquote
The thickness is not a big deal as the compression flange has some forgiveness for the size. After install of good rubber tighten compression screws until the tap turns with firmness.

This should give me a thumbs up but im not counting on it.

(yes, firmness is a word)
Wed Feb 05, 2014 10:29 am

Primasarah
1979 P200E, 1977 Rally 200, 1974 Primavera
Joined: 15 Mar 2011
Posts: 3087
Location: Lake Worth, FL
 
Primasarah
1979 P200E, 1977 Rally 200, 1974 Primavera
Joined: 15 Mar 2011
Posts: 3087
Location: Lake Worth, FL
Wed Feb 05, 2014 10:29 am linkquote
jimmyb865 wrote:
This should give me a thumbs up but im not counting on it.
Wed Feb 05, 2014 12:41 pm

nothing at all
Joined: 14 Nov 2008
Posts: 9657
Location: westla
 
nothing at all
Joined: 14 Nov 2008
Posts: 9657
Location: westla
Wed Feb 05, 2014 12:41 pm linkquote
Ha

Why do you think I said it. I am by no means a target watcher. I equate that to watching the clock at work.

Lazy people watch clocks .......and how many targets they have.
⬆️    About 1 year elapsed between posts    ⬇️
Mon May 04, 2015 1:42 am

Addicted
Rally 200, SS 180, ET3
Joined: 21 Feb 2010
Posts: 683
Location: UK
 
Addicted
Rally 200, SS 180, ET3
Joined: 21 Feb 2010
Posts: 683
Location: UK
Mon May 04, 2015 1:42 am linkquote
reserve
I realise this (v interesting) thread is quite old but....

Has anybody had an issue with the BGM when fuel reaches reserve levels? (Which on the BGM is quite soon)!

On my 225cc motor , as soon as i reach reserve levels, i suffer fuel starvation and it will start to pink

Riding with a full tank , even on reserve is ok.

Im actually looking to buy a SIP tap!!?? Even after all the leak problems ive read about. (Which is why i bought the BGM tap)

Ive had 2 x BGM, both suffer the same problem when on reserve levels.

I also notice that when compared to a stock tap, when i have to switch to reserve while riding, the BGM takes soooooo long for the fuel to cut back in. The stock tap takes literally just 1 or 2 seconds. With the BGM i was travelling at 60mph and came to a stop before the fuel cut back in!!!

So the SIP taps need a bit of work to the rubber washer for it not to leak!?

Anybody else had similar problems with reserve on BGM?

(My stock tap was always fine - which is what i have re fitted now.. But at over 8000rpm there is fuel starvation)

So whats the answer? Take my chances with a SIP tap????
Mon May 04, 2015 2:09 am

Molto Verboso
Vespa GS150, Messerschmitt GS150
Joined: 21 Jan 2013
Posts: 1062
Location: Glasgow
 
Molto Verboso
Vespa GS150, Messerschmitt GS150
Joined: 21 Jan 2013
Posts: 1062
Location: Glasgow
Mon May 04, 2015 2:09 am linkquote
Cant comment, but on one of my scooters I had a motorcycle fuel tap fitted and never had a problem, since sold it and wish I had kept the tank. I did have to have a threaded bose welded into the tank itself and it only had a fuel on/off, no reserve. It may be worth trying although expensive fix.
Mon May 04, 2015 3:12 am

Ossessionato
Joined: 24 Jan 2008
Posts: 2018
Location: Santa Margarita,Ca.
 
Ossessionato
Joined: 24 Jan 2008
Posts: 2018
Location: Santa Margarita,Ca.
Mon May 04, 2015 3:12 am linkquote
I actually put a bgm in the Rally this year. Was a problem the first time I hit reserve and got air in the line. The air bubble would not work out. Literally could disconnect the banjo and let the fuel run out. It would barely trickle. And yes I had the correct fuel hose length. And the float bowl vent was clear. The best I could figure out is without the vent tube you need a direct downward path so the air bubble can surface back in the tank. Works fine in my small frame as the hose is a direct downward path. In the Rally the hose goes downward and then back up to the carb, I guess the air bubble wouldn't go down to the bottom of the hose to vent out the carb, nor would it float up into the tank. Put the stock tap in and solved the problem
Mon May 04, 2015 9:11 am

Molto Verboso
Joined: 31 May 2009
Posts: 1221
Location: NC, USA
 
Molto Verboso
Joined: 31 May 2009
Posts: 1221
Location: NC, USA
Mon May 04, 2015 9:11 am linkquote
^^^^^That was beautiful. Me too. With vapor lock, a couple of times I could see the heat developed bubble protruding just below the banjo fitting. It couldn't go through the 90 degree bend into the float assembly.

Bubbles can flow upwards to the tank and out the vent tube. There's more 90 degree stuff through the holes in the tap to block it. I had a vent tube come out of the tap (press fit). Smartypants decided to plug the vent hole and let it work without it, like every other thing I've had. No go. The chickenshit pressure from gravity feed can't defeat the bubble.

Another bonehead move. I ran the fuel line OVER the fuel tap rod on a smallie. Looked downhill, but on a hot day, it died at idle. There was a bubble at the fuel rod slight hump.

For performance stuff, Rob Hodges idea of the GS (?) tap and line out the side of the frame by the carb for a downhill run sounds like a great idea. I think that's what he was saying.

On an SI, you could rotate the banjo and modify (bugger) the carb box for entry. A slot in the frame might give more wiggle room.
⬆️    About 1 month elapsed between posts    ⬇️
Sun Jun 14, 2015 4:07 pm

Addicted
Rally 200, SS 180, ET3
Joined: 21 Feb 2010
Posts: 683
Location: UK
 
Addicted
Rally 200, SS 180, ET3
Joined: 21 Feb 2010
Posts: 683
Location: UK
Sun Jun 14, 2015 4:07 pm linkquote
I looked into re routing the fuel line on my Rally, through the side of the air box (I still have fuel starvation issues)
The only 'nice' way to do it, without kinking the cable, would be to run it out of the side of the airbox, through the chassis (see black marks on chassis) over the rear wheel!! and then back inside the chassis...
Not so great..
So instead i tried this...

Its more of a downhill flow anyway
Ill see what happens and report back.
Wed Jun 17, 2015 5:17 pm

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 8109
Location: Victoria, Australia
 
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 8109
Location: Victoria, Australia
Wed Jun 17, 2015 5:17 pm linkquote
bholinath wrote:
So instead i tried this...
Its more of a downhill flow anyway
Ill see what happens and report back.
Nice idea Bholinath, looking forward to your thoughts. Btw, you dropped your fibre washer...
Wed Jun 17, 2015 10:08 pm

Hooked
GS160
Joined: 11 Jun 2014
Posts: 297
Location: Åland
 
Hooked
GS160
Joined: 11 Jun 2014
Posts: 297
Location: Åland
Wed Jun 17, 2015 10:08 pm linkquote
*smile*
Fri Jun 19, 2015 11:32 am

Molto Verboso
Joined: 31 May 2009
Posts: 1221
Location: NC, USA
 
Molto Verboso
Joined: 31 May 2009
Posts: 1221
Location: NC, USA
Fri Jun 19, 2015 11:32 am linkquote
bholinath,

Do the simple timed test shown in the pictures partway down page 2 so I don't have to. Hopefully your new tap and float needle size will give better results. Quarts and pints vs. liters and halves, what the heck. Keeping the distances close to installed is important. I only tested at near empty.
⬆️    About 6 years elapsed between posts    ⬇️
Fri Sep 17, 2021 6:18 am

Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
 
Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
Fri Sep 17, 2021 6:18 am linkquote
I have fitted two of these now both give same issue, air locks, going back to stock tap PX200.
Fri Sep 17, 2021 7:26 am

Hooked
PX 200
Joined: 25 May 2016
Posts: 416

 
Hooked
PX 200
Joined: 25 May 2016
Posts: 416

Fri Sep 17, 2021 7:26 am linkquote
Bjorn Toulouse wrote:
I have fitted two of these now both give same issue, air locks, going back to stock tap PX200.
Not tried the SIP v2 tap?

Holes are much bigger…

Are you sure it's not your fuel hose which is the problem? A hose too small or too soft will have the same symptoms
Mon Sep 20, 2021 12:36 am

Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
 
Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
Mon Sep 20, 2021 12:36 am linkquote
108 wrote:
Not tried the SIP v2 tap?

Holes are much bigger…

Are you sure it's not your fuel hose which is the problem? A hose too small or too soft will have the same symptoms
Hose was from a well established vespa dealer, fitted with no kinks 600mm long
Mon Sep 20, 2021 12:35 pm

Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
 
Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
Mon Sep 20, 2021 12:35 pm linkquote
I just put 2 High flow BGM. One like 6 months ago on my P200E and another one 3 weeks ago on my Sprint Veloce. My only complaint would be the quick transition from full to reserve.

Reserve suppose to be reserve not half of the tank. I am not getting any air bubbles. maybe I have the newest version.
Mon Sep 20, 2021 4:35 pm

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Mon Sep 20, 2021 4:35 pm linkquote
scooterist wrote:
I just put 2 High flow BGM. One like 6 months ago on my P200E and another one 3 weeks ago on my Sprint Veloce. My only complaint would be the quick transition from full to reserve.

Reserve suppose to be reserve not half of the tank. I am not getting any air bubbles. maybe I have the newest version.
You have the same version (V2) as mine I imagine. BGM mentions this plus-1 liter reserve as an improvement!
It's always seemed strange to have to have the engine die to realize you need gas.
Anyway, I'm going to hack mine in the following manner:
I'm going to cut the filter and the reserve level tube together with a utility knife, in the middle of the lower of the two "ribs." If someone wanted a more stock level reserve the cut could be made at the top rib.
I'll "weld" the filter back together with a soldering iron.



Mon Sep 20, 2021 5:02 pm

Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
 
Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
Mon Sep 20, 2021 5:02 pm linkquote
^^Thanks a lot for the tip. I probably wouldn't do it just yet unless I have to do more maintenance. The last two times I had to remove the tank on the P200E was when my oil plastic tank cracked horizontally. The following time that I had issues was from the engine dying randomly while riding (it was the fuel tab). If I decided to to the modification then I would go ahead and replace the oil and fuel line at the same time.

Here is the one that I replaced like 3 weeks ago, is BGM 3030, picture on the link below:

https://modernvespa.com/forum/post2497348?highlight=#2497348
Mon Sep 20, 2021 5:21 pm

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Mon Sep 20, 2021 5:21 pm linkquote
scooterist wrote:
^^Thanks a lot for the tip. I probably wouldn't do it just yet unless I have to do more maintenance. The last two times I had to remove the tank on the P200E was when my oil plastic tank cracked horizontally. The following time that I had issues was from the engine dying randomly while riding (it was the fuel tab). If I decided to to the modification then I would go ahead and replace the oil and fuel line at the same time.

Here is the one that I replaced like 3 weeks ago, is BGM 3030, picture on the link below:

https://modernvespa.com/forum/post2497348?highlight=#2497348
That's the one in my picture. BGM3030.
I'll perform the surgery and post it here.
Mon Sep 20, 2021 6:58 pm

Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
 
Molto Verboso
63 Lambretta LI 125 series 3, 71 Sprint Veloce , 2005 Vespa PX150, 1979 P200E
Joined: 04 Jul 2011
Posts: 1071
Location: Tucson, AZ
Mon Sep 20, 2021 6:58 pm linkquote
^^ Hopefully you don't screw up the mechanism too much. Please share the pictures.
Mon Sep 20, 2021 9:22 pm

Molto Verboso
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: 16 Apr 2011
Posts: 1921
Location: Siam
 
Molto Verboso
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: 16 Apr 2011
Posts: 1921
Location: Siam
Mon Sep 20, 2021 9:22 pm linkquote
Ray8 wrote:
Anyway, I'm going to hack mine in the following manner:
I'm going to cut the filter and the reserve level tube together with a utility knife, in the middle of the lower of the two "ribs." If someone wanted a more stock level reserve the cut could be made at the top rib.
I'll "weld" the filter back together with a soldering iron.
This seems like a lot of effort for very little benefit. I'm not so sure I'd feel ok with the plastic welded filter sitting in there. There's actually nothing wrong with using stock fuel taps, is there?
Tue Sep 21, 2021 9:19 am

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6215
Location: So Cal
 
bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6215
Location: So Cal
Tue Sep 21, 2021 9:19 am linkquote
I have BGM taps on three scoots with moderately tuned engines. They work fine but honestly go to reserve at about half a tank so the reserve is kind of a joke. IMO it's practically a design flaw. I'm surprised BGM hasn't fixed it. If there's a simple way to modify the reserve tube, I'd like to hear it. Sounds like Ray's method has promise.
Tue Sep 21, 2021 10:39 am

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Tue Sep 21, 2021 10:39 am linkquote
SoCalGuy wrote:
I have BGM taps on three scoots with moderately tuned engines. They work fine but honestly go to reserve at about half a tank so the reserve is kind of a joke. IMO it's practically a design flaw. I'm surprised BGM hasn't fixed it. If there's a simple way to modify the reserve tube, I'd like to hear it. Sounds like Ray's method has promise.
Okay, turns out the filter is threaded into the valve housing.
Took a pair of needle nose pliers and removed it (wouldn't turn by hand).
Cut the tube, at I'm rough-guessing 10 miles of gas, with a pair of scissors.
Bet that's what they intended. Choose your own reserve level.
Tue Sep 21, 2021 5:50 pm

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Tue Sep 21, 2021 5:50 pm linkquote
Some pics.


Threads. Lefty loosey.
Damaged some threads pulling it by hand but no problems


Tube cut.


A few drops of oil and tightened by hand.
Done

Tue Sep 21, 2021 11:57 pm

Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
 
Molto Verboso
px 200, lxv 125
Joined: 14 Aug 2012
Posts: 1101
Location: Glasgow
Tue Sep 21, 2021 11:57 pm linkquote
Interested to see how it goes but I have just ordered a stock part. Fed up with the grief. If any one is in the Glasgow area and wants one PM me and we can meet up.
Wed Sep 22, 2021 2:50 pm

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6215
Location: So Cal
 
bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6215
Location: So Cal
Wed Sep 22, 2021 2:50 pm linkquote
Nice fix. I tried unscrewing the filter on one of mine and it wouldn't budge. Felt like it was glued in place. May have to try again.
Wed Sep 22, 2021 5:05 pm

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Wed Sep 22, 2021 5:05 pm linkquote
It's pretty tight in there. Polypropylene and cut-thread metal will fuse like crazy.
If I had to do it over I'd wrap the base of the filter with a little double sided rubber tape first.
Well worth the little effort, IMO
⬆️    About 2 months elapsed between posts    ⬇️
Thu Nov 25, 2021 4:12 am

Hooked
PX
Joined: 07 Feb 2016
Posts: 183
Location: Switzerland
 
Hooked
PX
Joined: 07 Feb 2016
Posts: 183
Location: Switzerland
Thu Nov 25, 2021 4:12 am linkquote
Just was checking this old thread and I have maybe a really stupid question.
On my PX I have the fuel tank with the fuel guage and float that indicates when you are on reserve with the reserve light.
I bought A BGM fast-flow tap that Im going to fit.
It has a cable for the reserve light.
Can I just leave this cable disconnected and use the original tank level guage and light?
Also does it make so sense to fit the fast flow tap if the carb inlet hole is not drilled to the bigger 2.5mm hole?

Cheers Robbie
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