PlanefunMike
Active Member
Does anyone know what the estimated miles a '78 T140E should go on a tank of gas?
Mike
Mike
'78 Bonneville T140E miles on a tank of gas
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My '78 T140V seems to drink the gas quite liberally.....I never really paid close attention, but I'd guess I'm getting only about 110 miles out of it. Of course the riding style would make your mileage vary.
PlanefunMike
Active Member
Otherwise,
I don't care for the purposes of how much fun my bike is to ride. As a first time owner, I'm curious for the purpose of engine efficieny and perfromance. Having two carbs, I want to be sure it's operating as best as possible and I think gas mileage would be an indicator.
Mike
I don't care for the purposes of how much fun my bike is to ride. As a first time owner, I'm curious for the purpose of engine efficieny and perfromance. Having two carbs, I want to be sure it's operating as best as possible and I think gas mileage would be an indicator.
Mike
PlanefunMike
Active Member
Seeker,
That sounds about rigth. Last night I was around 140 miles on the freeway. This is helpful for trip planning!
That sounds about rigth. Last night I was around 140 miles on the freeway. This is helpful for trip planning!
Just for interest, my TSS 8 valve returns 46 miles per US Gallon, or 56 miles per Imperial Gallon. Splutters onto reserve at 185 miles (300 kms), then top up with 4 US Gallons, 3.3 Imperial Gallons or 15 litres.
140 miles and on the freeway riding a 34 y/o British bike is gutsy stuff.
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Gatornapper
Member
Well, my Bonnie is a '72 650 with rebuilt carbs & top-end and the best I can get out of it on trips is 38mpg....while my .09 "Screamin' Eagle"CVO Harley Road Glide with 1800cc gets
43mpg! Go figure....
But, as others are saying, who cares? It's all about the fun of riding a classic - especially one that is hot in both acceleration and the twisties......AND gets heads turned, "Hey!
Isn't that an old Bonneville?!?!" Then, of course, you hear their war story on how they had one, or their friend had one, or they had an old Honda......... ;-)
My sweet '72 T120V Bonnie
'73 Trident T150V, '72 Bonneville T120V, '71 Trophy 500 T100C - "A Dream Collection" (w/apologies to all '60's purists)
43mpg! Go figure....
But, as others are saying, who cares? It's all about the fun of riding a classic - especially one that is hot in both acceleration and the twisties......AND gets heads turned, "Hey!
Isn't that an old Bonneville?!?!" Then, of course, you hear their war story on how they had one, or their friend had one, or they had an old Honda......... ;-)
My sweet '72 T120V Bonnie
'73 Trident T150V, '72 Bonneville T120V, '71 Trophy 500 T100C - "A Dream Collection" (w/apologies to all '60's purists)
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+1 Very well said.
It doesn't matter much to me either......I enjoy PUSHING my T140V a couple of miles uphill 
Good exercise! 
My 1977 T140V does around 45mpg, but I also have a Silver Jubilee T140 with around 2500 miles on the clock, which I haven't taken over 65mph yet, andthe last tankful did around the 65mpg mark. Carb wear and riding style make a lot of difference - by the way, thats imperial gallons not US ones!
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