PRO_Crastinator
New Member
Saweet! That's over a 500mile tank for my little bike.. Great work. I actually have some glass and foam here somewhere..san't wait to try it out! The wife is watching me type this and said thanks alot...
CB450 K7 Fiberglass Tank Build
- Thread starter CCRider
- Start date
baby elephant guy
Been Around the Block
HAVE YOU HAD ANY ISSUES WITH GAS YET? HOWS THE EPOXY HOLDING UP?
rammie2000
New Member
This is super. I read This 5 times last night. Orderd everything today and I'm sure as he'll going to try that starting tomorow!!!!!
Brian77cb750
New Member
Just read all 9 pages 
.... eyes burning....
I have to say this is a VERY NICE tank, very clean in every step, and detailed!
.... eyes burning....I have to say this is a VERY NICE tank, very clean in every step, and detailed!
CCRider said:Next, two layers of fiberglass cloth were layed up in the frame tunnel and the recesses in the underside of the tank. The strange gray colored squares you see under the cloth are just pieces of tape covering a few accidental deep gouges in the styrofoam mold.
hi, can you tell me what kind of epoxy do you use to seal the side of the tank?
In the pix above the excess cloth that was left above the flat bottom surface of the tank has been trimmed off. The excess is easily trimmed with a sharp razor knife after the resin has set but before it fully cures.
After the resin fully cured, the finishing touches were put on the tank shape. Handlebar and knee dents were formed and the mold was sanded with 220 grit to prep for glassing.
I came really close to screwing up at this stage. While i was sanding out the right side handlebar dent, I didn't have the throttle cable installed. Luckily I caught the mistake and enlarged the dent or the cable attachment would have hit the tank at that point.
The top side of the tank got two layers of cloth plus another couple of layers on the mounting tab extending 3"-4" up the back end of the tank.
The foam blocks were beginning to delaminate a bit in a few places, so the tape you see below the glass is just there to hold the gaps tight together during glassing. (They'll come out later)
The only thing left on the exterior shell now is to glass the flat bottom side. Since the glass won't wrap around the sharp corners, they have to be treated a little differently. Using a razor blade, I cut out a chamfer about 1/4"-1/2" deep in the foam along the edge of the previously layed up bottom and side surfaces. The foam was removed from the chamfer and the inside surface of the glass was cleaned and roughened with the edge of a razor knife. The chamfer was then filled with epoxy thickened with milled fibers (a structural filler made of tiny pieces of glass fiber). When the filler cured , it was sanded down flat with 80 grit paper.
Two layers of cloth on the bottom surface and the easy part's done !
And a shot all trimmed up:
Next time we'll cut it apart and start digging out the foam.
CC
CCRider
Coast to Coast
Newxs650,
The tank was originally sealed with the same West Systems Epoxy that I did the lay up with. I just painted a nice thick layer on the inside before I joined the halves together. After a year or so, I could see no issues with the condition of the epoxy.
I did start having problems around the filler neck though. I made the mistake of priming the filler neck with a non fuel proof primer before I glassed it into the tank. Gas got to the primer through some hairline cracks or voids in the epoxy resin and caused the resin to chip off around the filler.
Because of this (and just to be on the safe side) I cleaned the inside of the tank and sealed it with POR-15 which is holding up well after a few months.
CC
The tank was originally sealed with the same West Systems Epoxy that I did the lay up with. I just painted a nice thick layer on the inside before I joined the halves together. After a year or so, I could see no issues with the condition of the epoxy.
I did start having problems around the filler neck though. I made the mistake of priming the filler neck with a non fuel proof primer before I glassed it into the tank. Gas got to the primer through some hairline cracks or voids in the epoxy resin and caused the resin to chip off around the filler.
Because of this (and just to be on the safe side) I cleaned the inside of the tank and sealed it with POR-15 which is holding up well after a few months.
CC
R
RotaryDanglish
Guest
Sorry for bumping, but this is absolutely amazing. It has been said before, but you make it look so easy! I AM gonna have to use this technique on my Norton, though Kevlar reinforced for good measure.
R
RotaryDanglish
Guest
Yup, found him too via Emokid's Nazgul build, absolutely breathtaking work.
However, would kevlar hold up to the sharp bend on the edge of the tank as uposed to S-cloth? Seing as that's what Ringo have done but I'm still a bit causious..
However, would kevlar hold up to the sharp bend on the edge of the tank as uposed to S-cloth? Seing as that's what Ringo have done but I'm still a bit causious..
