Hi guys,

Was wanting to know if anyone out there has converted there standard 4rt tank into a flat tank just wondering if anyone has pics or info on it and what thickness alloy you used bike is 2006 4rt.

Thanks Jason

Here's some info:

Look on the right side of the page under "special parts" - "flattank"

 

And under "tuning" - "modifications" - "fuel pump"

 

http://montesa4rt.nl/

What's the advantage of the flat tank?

What's the advantage of the flat tank?

Less fuel

More refuels

Style over function

Yes I have , I used 1,2 was gonna go thinner but wanted little more strength

Im a welder fabricator by trade so cost me nothing otherwise I wouldn't have bothered

It's lighter than standard , looks far better than standard in my opinion

And regards fuel capacity the loss is minimal I fill up no more than anyone else and certainly less than my old 300 gas gas

And if I do a trial with any distance id put my auxiliary hebo tank on

And best of all it was free

Edited November 4, 20169 yr by toneh

looks good

 

Wow that looks awesome exactly what I was after, when you say 1.2 was that 1.2mm how did you get the nice rolled edges.

Thanks Jason

Yes 1.2 mm , I rolled the whole top to get the basic curve , and we have got some tiny rollers at work so I just pinched the sides and bent them over

Then spent a fair while tapping it round the edges to get a nice fit for welding

It is actually a compound curve but not worth stretching because aluminium that thickness is easy to manipulate by hand

Would have liked to get the top bracket welded on a bit neater but I dropped a clanger and forgot to remove the anodising

And got some porosity in it

Couldn't be bothered to grind it out and start again

But to be honest I've seen some named tanks where the welding is nothing to shout home about

Oh and you don't actually need to remove the top bracket

Just a bit too much haste with the grinder

Doh

Thanks everyone for the replies will give this a go in the next couple of weeks will post results

Less fuel

More refuels

Style over function

 

I think Munch did at least one that actually had a greater fuel capacity

Nice job Toneh, what alloy sheet did you use, Pretty soft, 1100??