:: Yamaha Virago XV Forums That Rock!!! » Choppers, Customs, Café » Maxim tank mod revisited.

#1:  Maxim tank mod revisited. Author: Matthew Post Posted: 20 Feb 2005 06:28 am

Maxim tank mod revisited.

One of the first thing I did when I got my bike is the front end mod with dual disc brakes. And I got the maxim tank with it. I really hacked the crap out of it.

But I'm gonna try and fix it.

Though it will never fit my bike with the stock faring on.
I hope to have a good 5gal tank.
Tunnel is deeper to cover more like the Virago tank.

Though some would still call this a hack job.
Not a hand rolled 2 piece and there will be bondo involved.

#2:  Re: Maxim tank mod revisited. Author: Matthew Post Posted: 25 Feb 2005 11:32 am

Maxim tank mod revisited.

more pics

#3:   Author: cul8er Post Posted: 25 Feb 2005 05:05 pm

I went out to;, look at your mod process as I'm getting ready to do a fatbob tank on my 920. In the last pic on the page I seen the air filter on the rear cly. carb, what is it? And how did you mount it? I need to do something like that, because to get the fatbob tanks on with only 3 - 3.5 inches inbetween, I have to shave off the stock airfilter tubes on the frame and weld them up.

#4:   Author: Matthew Post Posted: 25 Feb 2005 05:08 pm

#5:   Author: Matthew Post Posted: 26 Feb 2005 11:38 am

Little more work done. Moved the filler neck up and to the middle.

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#6:   Author: Matthew Post Posted: 26 Feb 2005 11:44 am

I can tell already I got the 5+ gallons.

Was starin at it thinking. What if I made a beer holder. I mean a pop can or bottle holder. Tank is so big. Put it on the left side. Easy to grab and drink from on the go. Use a pop can cooler for a liner. Weld in a steel can of proper size to say cover a 12oz can 3/4 of the way. So the drink doesn't move to much.

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#7:   Author: Matthew Post Posted: 28 Feb 2005 06:34 pm

more pics

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#8:   Author: Matthew Post Posted: 31 Mar 2005 06:42 pm

Still gots lots of work to do.
But took a side by side shot with the stock tank.

If the stock tank is 3 1/2 gal.
The maxim ones look like an 8gal tank next to it.eek

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#9:   Author: cul8er Post Posted: 01 Apr 2005 06:28 pm

With the tank being used, and possible gas fumes and residue, how did you prepare the tank for welding so it would not blow up on ya?

#10:   Author: Matthew Post Posted: 01 Apr 2005 07:11 pm

Well the tank sat in a junk yard for probably 3-4 months with no gas cap.
When I got it I had barley any real tools. So I cut it open with a drill bit, really hacked it up. Then it sat for 2 years in which time I got some real tools and started up my business. So it had plenty of time to "vent"

Though after I cut it into 3 pieces. I baked it in the oven for a while.
Till all the paint fell off. But that was really just dry it out and help remove the rust. It was full of leaves n water.

It kind of sucks as I need to remove my faring to do any test fitting. I don't wanna finish the front neck part until I can test fit it to get a clean stock like look. Also gotta weld some tunnel scoops or find a new way to mount it.

Its a monster though.

#11:  Re: Maxim tank mod revisited. Author: Johann Post Posted: 20 Jul 2005 12:30 pm

sir matthew just a question. in widening the tank, do you have to apply something inside (like paint or rust proofing)? i mean when you ad all those steel plates, and you fill the finished tank with fuel, would it rust inside after sometime? do you have to apply a finish coat or something inside. thanks. nice job sir, i'm taking out my tank for widening too. Laughing


#12:  Re: Maxim tank mod revisited. Author: dr phil Post Posted: 20 Jul 2005 06:01 pm

cleaning and sealing are easy! Muriatic acid available at farm stores and building marts for around $4 a gallon. Straight (DON"T breathe the fumes!!) to strip inside of tank. Flush with lots of plain water. Seal with stuff found at Powersports type places. Around $16.00 a pint. One pint will do most tanks - Except maybe not Matthew's 20 gallon job!!

#13:   Author: Matthew Post Posted: 21 Jul 2005 05:35 pm

Oh yea, it will need to be sealed with something.
This is no hand rolled 3 piece tank. I use bare concert etch and rust removed. Muric acid.

Its some bad stuff. It puts rust in a choke hold and kills it right now. Rust is alive to a point. Sort of like mold on wood.

#14:  Re: Maxim tank mod revisited. Author: San Antone RR Post Posted: 30 Jul 2005 03:12 am

Are you gonna have triple tree and/or handlebar clearance issues? I put a larger tank on my XS1100 and had to tap the tank in a bit on both sides. Your tank looks like you might have that sort of issue as well.
Just a thought.

#15:   Author: Matthew Post Posted: 30 Jul 2005 03:36 am

I still have a set of my special bar risers for the 81-83. PITA to make but work well.

#16:   Author: Matthew Post Posted: 07 Mar 2006 06:04 am

Got some test fit shots of the tank on the bike compared to the stock tank.

#17:   Author: Roger Ramjet Post Posted: 07 Mar 2006 11:03 am

Looks good Matthew,If you get it finished right there is going to be a few people that wouldn't know it from stock.

#18:   Author: notec Post Posted: 07 Mar 2006 11:36 pm

Looks really good.........I wish I had a spare tank to cut..........maybe I will try a coffin tank.......

#19:   Author: Roger Ramjet Post Posted: 08 Mar 2006 03:22 am

Cut the Honda tank

#20:   Author: notec Post Posted: 08 Mar 2006 03:31 am

I actually thought about that........just to get the dents out of it, and re weld it.

#21:   Author: geo Post Posted: 11 Mar 2006 03:08 am

wow matt, i'm impressed. i also like the out house door!

#22:   Author: walston33 Post Posted: 11 Mar 2006 03:55 am

atta boy matthew,,,so just how much bigger is that puppy,,,looks huge,,,bigger is always better...

#23:   Author: Matthew Post Posted: 11 Mar 2006 07:37 am

Thats a old moon roof from a car. My work shop has two set of double doors so I back the portable garage into one set. But only used one door. Nailed one shut and flipped hinges on the other.

#24:   Author: Matthew Post Posted: 11 Mar 2006 07:42 am

need to finish welding it so I can see how much it holds. Gloves on the tank are covering a big hole, neck parts is still not welded.

I sure hope I get 5gal

#25:   Author: walston33 Post Posted: 12 Mar 2006 11:47 pm

lol,,i bet u'll end up with about 9 gallons if not more..
talk about cruizin,,,long haulin rides,,only have to pull over for gas about evry 400 miles or so,lol..

#26:   Author: Matthew Post Posted: 12 Mar 2006 11:51 pm

id love 8-10 gal, be able to ride n forget about needing gas.

stock tank looks so puny compared.

#27:   Author: walston33 Post Posted: 13 Mar 2006 03:04 am

i know it,,kinda makes ya wonder why they dont put super fat bob tanks on all bikes,lol.

#28:   Author: walston33 Post Posted: 13 Mar 2006 08:24 am

definatly wanna see pics of it ur done,,,ur bike is gonna look like a,, super tanker cruiser deluxe..
you'll be gettin that double take look a bunch,,,then theyll be sayin to themselves,,holy $hit ,did you see the tank on that bike,now where can i get one,lol.

#29:   Author: geo Post Posted: 14 Mar 2006 02:44 am

gas 7 lb. per gallon. 10 gallons is 70 LBS! slap some kid on the tank and go for a wild ride to see how it handles first!

#30:   Author: yamahog Post Posted: 16 Mar 2006 05:44 pm


#31:   Author: Matthew Post Posted: 16 Mar 2006 08:02 pm

I still have my stock tank I could mount at any time but for the long haul cruise. Id love a good 5gal +

#32:   Author: yamahog Post Posted: 17 Mar 2006 03:49 am

5 would be great, 200+ miles to cruise! but 10 is too much

#33:   Author: notec Post Posted: 17 Mar 2006 03:53 am

Take your saddle bags and rig up a couple of small gerry cans. Just dont crash!!!

#34:   Author: geo Post Posted: 18 Mar 2006 02:22 am

my roadstar tank is 5 gallons and it is ok. i love the distance i can get.

#35:   Author: walston33 Post Posted: 18 Mar 2006 03:36 pm

ya i really like the new roadstars,,,thats a real nice bike.
102 c.i. ,long stroke,1670cc,,,fifth gear overdrive,,oh ya....

#36:   Author: walston33 Post Posted: 19 Mar 2006 01:02 am

but after you gitr done and one ur bike be careful,,all that weight sloshing around might make it handle squirrely...

#37:   Author: Matthew Post Posted: 20 Mar 2006 12:46 am

I'm gonna trike mine out and the first mod will be a car alt mounted to run of the drive shaft by belt and I'll be using a good size car battery. Add in the rear end, framing, extra tire n rim.............

Its probably a good idea to have 8-10 gal of fuel on the front end to balance it out. trikes turn with the wheel not leaning, so more front end weight = traction......... = less chance I just go straight instead of turning.

#38:   Author: walston33 Post Posted: 21 Mar 2006 02:24 am

sounds like a good plan.....gitr done,lol.

#39:  Re: Maxim tank mod revisited. Author: shtsmt Post Posted: 22 May 2006 10:08 pm

From what year was the maxim tank? I HAD a tank off an '83 Midnight Maxim that fit weel over my '81 frame Except where the mounting bolt went, I was gonna have to cut it from it's original position and move it forward about 2.5 inches.Before I could do that though it fell out of the open rear door of my van and I ran over it and creased good pissed .I just picked up a tank from an '80 maxim and this one doesn't even come close, the tunnel is way too shallow.Guess I'm heading back to the salvage yard.............

#40:   Author: Matthew Post Posted: 22 May 2006 10:48 pm

83 » Choppers, Customs, Café » Maxim tank mod revisited.

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