Megamoto fuel range.

[Joe Bar]

Following a post about it on Adv Rider, I finally got round to drilling the fuel filler neck on the MM in an effort to increase it's abysmal fuel range.

I've now managed to get through a couple of tanks of fuel and here's the verdict -

Fuel light now comes on at 100 miles (1st tank 99 miles, 2nd 100 miles), previously coming on between 75-80 miles.

First tank ran to 119 miles with 25 miles showing on the range indicator at fill up.

Second tank I ran to 135 miles with 9 miles showing on the range indicator, and re-filled with 12.3 litres. Spec shows tank as having 13 litre useable capacity.

Overall, well pleased with the increase which seems to have put about 20-25 miles on the range, and at 135 miles to the fill up I was happy to have 10 minutes off the seat anyway

Just need to make sure the bike's not full before leaving it standing, espescially in the heat, as effectively, your putting petrol into the expansion area and at £1.30 a litre I'd hate to see it siphoning out of the vent pipe

 

[ovenpaa]

This sounds better than my standard HP2 - On 17" wheels I typically see the fuel light come on from 70 to a maximum of 85 miles with another 40 miles left to go. Fill from empty is around 12.3 litres.

I also drilled the filler cap - this is just to let the air get out whilst filling and does not seem to give any more usable tank space, it is just a bit quicker to get the stuff in, beware fuel going out through the breather, for me this is normally because I am on twisty roads and the tank contents slosh around, the side effect of the full tank is fuel goes out of the breather, into the headstock and washes the grease away from the bearings, this in turn runs out of the bottom down the back of the mudguard and over the front engine case and looks like an oil leak at first glance....

 

[Lugs]

can you explain in more detail what this is about?

 

[ovenpaa]

You can drill a couple of holes in the neck of the tank filler to allow air to escape as the tank is filled, on some machines this allows more fuel in the tank, on an 1150 Adventure this modification is worth an extra litre.

On the HP2MM it looks to make a difference on the normal HP2E it just allows fuel to go in quicker towards the end of the fill.

 

[(RIP) maverick]

Did the longest day from John O'Groats to Lands End two weekends ago and managed to run my bike dry.

I have found that you can do at least between 6 and 15 miles once the range meter says zero

It ran dry at 150 miles exactly this was doing 80mph on the odo on the motorway in wind and rain. Next day running up from Lands End back to London bimbling through Dartmoore National park at 50/60mph and generally 80mph on the motorway again managed 159 miles on 11.40 liters Please note bimbling not riding it's nuts off

Generally on our trip I filled up between 130 - 140 miles no probs every time . The HP2 seems to sip fuel if you keep it under 85mph compared to the 1150 and 1200 that was riding with me

 

[ovenpaa]

The HP2 seems to sip fuel if you keep it under 85mph

I will try that for a week (If I ever get it back )

 

[Joe Bar]

I have found that you can do at least between 6 and 15 miles once the range meter says zero

It ran dry at 150 miles exactly this was doing 80mph on the odo on the motorway in wind and rain.

That's useful to know, but I'm glad you told me and I didn't have to find out for myself