CSC Encore gas mileage

[NJMike]

My brother and I are considering converting our ‘21 Goldwing Tour DCT’s at the CSC factory. We are wondering how much the average MPG might change after the conversion. We both are “conservative” riders.

[rhino 2]

My brother and I are considering converting our ‘21 Goldwing Tour DCT’s at the CSC factory. We are wondering how much the average MPG might change after the conversion. We both are “conservative” riders.

Mike..Welcome to Trike-Talk…. My uneducated guess 2 to 3 miles per gallon but if you are worrying about gas mileage while you’re doing a conversion, maybe they could put in a auxiliary gas tank…. now is the time to do it….

[trike lady]

Hello & to Trike Talk.

[Jack Klarich]

Hi Mike, to Trike Talk and your first post

There are a lot of variables to consider, weight, riding style, tune of the engine, gear ratios etc

Bob hit it good, most can expect to see 2-5 miles less than a 2 wheeler

[cScjhb]

Welcome! My experience is a little different. But, I'm dealing with older Goldwings. My riding is/has been rather conservative. When riding the 3 different GL1800s (2 wheelers) I've owned, my fuel consumption was pretty consistent at 38-40 MPG unless I got on the interstate and cruised 70+ MPH. Then it went down a bit. Going to a trike of the same vintage, my MPG dropped to a very consistent 34. Same roads, same riding style, same GL1800 engines. I have the auxiliary fuel tank bringing my total capacity to 10 gallons. Very glad to have it. Good luck..... Jim

[paws]

Welcome! My experience is a little different. But, I'm dealing with older Goldwings. My riding is/has been rather conservative. When riding the 3 different GL1800s (2 wheelers) I've owned, my fuel consumption was pretty consistent at 38-40 MPG unless I got on the interstate and cruised 70+ MPH. Then it went down a bit. Going to a trike of the same vintage, my MPG dropped to a very consistent 34. Same roads, same riding style, same GL1800 engines. I have the auxiliary fuel tank bringing my total capacity to 10 gallons. Very glad to have it. Good luck..... Jim

Very same experience here with the MPG on the 2008 GL1800...

I always wished I'd had an auxilliary gas tank on that Gold Wing trike as the gas gauge would drop slowly on the first half... then dropped like a rock on the 2nd half... leaving me panicking to get gasoline... on group rides I learned to fill up at every opportunity to be able to enjoy the ride. I never knew how far it would go on the 2nd half because I filled up at 1/2 tank...religiously. I never wanted to be the one to pull everybody over from the ride, hoping someone could siphon or go get gasoline for me. GET THE AUX FUEL TANK... you will be SO glad you did... !!

[FRR]

My brother and I are considering converting our ‘21 Goldwing Tour DCT’s at the CSC factory. We are wondering how much the average MPG might change after the conversion. We both are “conservative” riders.

Back to answering your original question... I have a 2019 DCT with a CSC kit on it. I get 41-43 with the kit riding 55-60. And like many others, what few times I ride 70 plus I get around 37.

[woody]

Just got back from north Georgia for a week and ending up with 42 mpg on my 2019 CSC

[NJMike]

All great comments, thanks to everyone! If the mpg only drops less than 5 mpg, I consider that more than acceptable. At 47 mpg our tanks last about 240 miles. We rarely ride more than 100 miles before taking a break, then the next stop is about 80 miles for gas. If we only got 40 mpg after the conversion we could still do 180 miles with a 40 mile reserve. I do admit though that the extra tank wouldn’t hurt.

[NJMike]

Another question - my understanding is that the aux tank is installed somewhere that is higher than the existing tank, which is why it gravity feeds into the existing tank. So when you gas up, which tank does the gas go into first? And does the filling take extra long because of the gravity feed system?

[rhino 2]

Another question - my understanding is that the aux tank is installed somewhere that is higher than the existing tank, which is why it gravity feeds into the existing tank. So when you gas up, which tank does the gas go into first? And does the filling take extra long because of the gravity feed system?

Someone please correct me if I’m wrong….But I think it’s just opposite….The standard tank drains first and then the gas is pumped up

from the aux tank into the standard tank The Aux tank has it’s own pump.

[Jack Klarich]

Someone please correct me if I’m wrong….But I think it’s just opposite….The standard tank drains first and then the gas is pumped up

from the aux tank into the standard tank The Aux tank has it’s own pump.

Pretty sure you are correct on this, seems there was a thread a bit ago about a pump being bad on an auxiliary tank

[trike lady]

according to the CSC website the tank is gravity fed with no pump.

[rhino 2]

according to the CSC website the tank is gravity fed with no pump.

I guess we’re gonna have to wait for Paul Harvey for the rest of the story…😉😉

Mea-Culpa.. I just looked it up and that particular model is gravity fed..😢..

[Ironhorse54]

Hi, I’m Ironhorse54, NJMike’s brother. My first post and happy to be here. Question: where is the aux tank located? What njmike is asking is when you gas up does the gas go into the aux tank first or 2nd? How is the aux tank filled?

[cScjhb]

Well, Here's the rest of the story..... The aux tank does not have any pump or separate filler. The bottom of the main tank is below the bottom of the aux tank. The top of the aux tank is below the top of the main tank. So with the trike being level, like in a gas station, the aux tank fits between the top and bottom of the main tank. Hope this makes sense. The aux tank vents into the main tank vent so there is no separate venting for it.

Imagine both tanks being completely empty. When starting to fill with fuel, the bottom of the main tank fills first. Then as the level rises, fuel begins to flow into the aux tank as both tanks get fuel. Then when the aux tank gets full, all the remaining fuel goes into the top of the main tank. Both tanks are then full. There is no separate fuel gauge for the aux tank. The first fuel used will lower the level from the top of the main tank. Gage will show a relatively quick drop. Then as more fuel is used, the level of both tanks goes down. During this period, the fuel gage moves very slowly. Once the aux tank is pretty empty and the fuel light comes on, there is between 1 1/2 and 2 gallons of fuel left.

This system works very well. No mechanical or moving parts. The only down side is it take a little longer (maybe a minute or so) to fill up. The main transfer hose between the aux and main fuel tank is 1" dia. so the fuel flows pretty well.

Hope this clears things up..... Jim

[rhino 2]

Well, Here's the rest of the story..... The aux tank does not have any pump. The bottom of the main tank is below the bottom of the aux tank. The top of the aux tank is below the top of the main tank. So with the trike being level, like in a gas station, the aux tank fits between the top and bottom of the main tank. Hope this makes sense. The aux tank vents into the main tank vent so there is no separate venting for it.

Imagine both tanks being completely empty. When starting to fill with fuel, the bottom of the main tank fills first. Then as the level rises, fuel begins to flow into the aux tank as both tanks get fuel. Then when the aux tank gets full, all the remaining fuel goes into the top of the main tank. Both tanks are then full. There is no separate fuel gage for the aux tank. The first fuel used will lower the level from the top of the main tank. Gage will show a relatively quick drop. Then as more fuel is used, the level of both tanks goes down. During this period, the fuel gage moves very slowly. Once the aux tank is pretty empty and the fuel light comes on, there is between 1 1/2 and 2 gallons of fuel left.

This system works very well. No mechanical or moving parts. The only down side is it take a little longer (maybe a minute or so) to fill up. The main transfer hose between the aux and main fuel tank is 1" dia. so the fuel flows pretty well.

Hope this clears things up..... Jim

Thanks….👍👍..

[Ironhorse54]

Awesome answer Jim. Thanks a lot for the info.

[NJMike]

Jim, I can’t believe you are up and answering at this time of night! Your answer was exactly what I was looking for! Maybe Eddie (ironhorse54) and I will see you at the factory on Sep 12 when we visit!

[rhino 2]

Hi, I’m Ironhorse54, NJMike’s brother. My first post and happy to be here. Question: where is the aux tank located? What njmike is asking is when you gas up does the gas go into the aux tank first or 2nd? How is the aux tank filled?

Eddie…Welcome to Trike-Talk..👍👍..