The Tomahto! - Page 5

TominMO · 02-15-2023, 05:38 PM

OK, I'm done with this Chinese black fuel line. Even with the new smaller clamps, it still leaks!

I mic'd the fuel barbs on the carb. Different measurements depending on where I measured. Closest to the carb it was 5.85mm; then a narrow thicker part was about 6.87; then a wider part towards the tip was 6.20; then at the tip it was 6.90. Barb ID was 3.75mm. The black hose ID was 4.91, so plenty snug it seems to me. But it ain't working.

Tmw I'm taking the carb to a local-ish Honda dealer to try and get some actual motorcycle fuel line, the clear stuff.

On the plus side, it did start on the second kick! Almost on the first one.

Also my new OEM Honda side cover and knob came in today. Trying to get the pic up. Lost my nifty little photo editor in the upgrade. Edit: got it, sorta.....

TominMO · 02-16-2023, 10:38 AM

Re-thinking the fuel line issue. Did a search on fuel barbs for these carbs. They do not have the same design as modern barbs. One guy had loose barbs, and solved it with JB Weld. Now no leaky.

I was curious if the leak was from where the barb fit into the petcock, or from the hose end. Previously I had assumed it was the hose not getting sealed enough. So I connected a spare piece of hose and used one of the Chinese clamps, but put it on with a small gap between the hose end and the petcock, so I could observe the barb and from which end the leaking was. Dribbled water in from my kitchen faucet. No leaking of any kind. The clamp was over the two higher sections of the barb, so maybe that also helped. I will re-try this test with actual gasoline, to see if that matters compared to water. The water went into the float bowl, so I drained it out with the screw-out drain plug.

Cold and high humidity today, so Ima gonna wimp out and get to it tmw or Sat.

TominMO · 02-17-2023, 10:32 PM

Went to Farm and Home, which has a great selection of fuel line in the Lawn & Garden section. Got 2 feet each of 3/16" and 1/4" clear line, about $5 apiece. Gonna fool with it tmw afternoon. In the morning I am meeting my kayak-paddlin' friend at Dick's Sporting Goods to look at kayaks.

Edit to change Tractor Supply to Farm and Home. Reason: senior moment.

2LZ · 02-18-2023, 12:48 AM

I feel your frustration. I have an oil line on the BSA that oozes for no apparent reason. At least I have a built-in excuse! It's Brit!

TominMO · 02-18-2023, 07:04 PM

Decided I'm gonna try and use the full black line for the Main. For the Reserve I'll cut the black line in half and stick a good quality fuel filter on it, with clear line from there to the petcock. Inside the tank, the Reserve hole is right on the tank's bottom, so debris is much more likely to go down that hole, The Main pipe sticks up about an inch or more, so for it I will rely on the carb's internal screen filter on its petcock.

I tried both the 3/16" and 1/4" line, and it's definitely 1/4". The 3/16" will make a good overflow line for the battery, but I will have to heat up the tip of the line slightly to soften it, to fit onto the battery's barb.

On Amazon there are cheap Chinese inline fuel filters which are known to self-destruct if you look at them wrong. Or you can get a K&N for $15ish. I am going to try a filter for a 1971 MGB, Fram G2 or Wix 33002, both about $3.

XLsior · 02-18-2023, 07:59 PM

The cheap plastic and paper pleat small 'motorcycle' feul filters are ok* and usualy come in lots of 5x/10x/20x so if 1 fails for whatever reason its easy enough to replace.

The glass/chrome 'reusable' filters are absolutely a hazard and best avoided.

TominMO · 02-18-2023, 08:44 PM

Quote:

Originally Posted by XLsior

The cheap plastic and paper pleat small 'motorcycle' feul filters are ok* and usualy come in lots of 5x/10x/20x so if 1 fails for whatever reason its easy enough to replace.

The glass/chrome 'reusable' filters are absolutely a hazard and best avoided.

I would rather just buy one good quality filter that will last many thousands of miles, rather than deal with a broken filter away from home.

02-15-2023, 05:38 PM	#61
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,868	OK, I'm done with this Chinese black fuel line. Even with the new smaller clamps, it still leaks! I mic'd the fuel barbs on the carb. Different measurements depending on where I measured. Closest to the carb it was 5.85mm; then a narrow thicker part was about 6.87; then a wider part towards the tip was 6.20; then at the tip it was 6.90. Barb ID was 3.75mm. The black hose ID was 4.91, so plenty snug it seems to me. But it ain't working. Tmw I'm taking the carb to a local-ish Honda dealer to try and get some actual motorcycle fuel line, the clear stuff. On the plus side, it did start on the second kick! Almost on the first one. Also my new OEM Honda side cover and knob came in today. Trying to get the pic up. Lost my nifty little photo editor in the upgrade. Edit: got it, sorta..... Attached Thumbnails __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

02-16-2023, 10:38 AM	#62
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,868	Re-thinking the fuel line issue. Did a search on fuel barbs for these carbs. They do not have the same design as modern barbs. One guy had loose barbs, and solved it with JB Weld. Now no leaky. I was curious if the leak was from where the barb fit into the petcock, or from the hose end. Previously I had assumed it was the hose not getting sealed enough. So I connected a spare piece of hose and used one of the Chinese clamps, but put it on with a small gap between the hose end and the petcock, so I could observe the barb and from which end the leaking was. Dribbled water in from my kitchen faucet. No leaking of any kind. The clamp was over the two higher sections of the barb, so maybe that also helped. I will re-try this test with actual gasoline, to see if that matters compared to water. The water went into the float bowl, so I drained it out with the screw-out drain plug. Cold and high humidity today, so Ima gonna wimp out and get to it tmw or Sat. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	1

02-17-2023, 10:32 PM	#63
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,868	Went to Farm and Home, which has a great selection of fuel line in the Lawn & Garden section. Got 2 feet each of 3/16" and 1/4" clear line, about $5 apiece. Gonna fool with it tmw afternoon. In the morning I am meeting my kayak-paddlin' friend at Dick's Sporting Goods to look at kayaks. Edit to change Tractor Supply to Farm and Home. Reason: senior moment. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself Last edited by TominMO; 02-18-2023 at 08:20 AM.
	2

02-18-2023, 12:48 AM	#64
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,078	I feel your frustration. I have an oil line on the BSA that oozes for no apparent reason. At least I have a built-in excuse! It's Brit! __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	2

02-18-2023, 07:04 PM	#65
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,868	Decided I'm gonna try and use the full black line for the Main. For the Reserve I'll cut the black line in half and stick a good quality fuel filter on it, with clear line from there to the petcock. Inside the tank, the Reserve hole is right on the tank's bottom, so debris is much more likely to go down that hole, The Main pipe sticks up about an inch or more, so for it I will rely on the carb's internal screen filter on its petcock. I tried both the 3/16" and 1/4" line, and it's definitely 1/4". The 3/16" will make a good overflow line for the battery, but I will have to heat up the tip of the line slightly to soften it, to fit onto the battery's barb. On Amazon there are cheap Chinese inline fuel filters which are known to self-destruct if you look at them wrong. Or you can get a K&N for $15ish. I am going to try a filter for a 1971 MGB, Fram G2 or Wix 33002, both about $3. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

02-18-2023, 07:59 PM	#66
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,277	The cheap plastic and paper pleat small 'motorcycle' feul filters are ok* and usualy come in lots of 5x/10x/20x so if 1 fails for whatever reason its easy enough to replace. The glass/chrome 'reusable' filters are absolutely a hazard and best avoided.
	0