Stretching my 2003 Zuma 50cc 2t

[furiousbob]

Jan 17, 2024 2:50:41 GMT -5 monsterunderyourbed said:

Did you lengthen the actual exhaust at all or did I read that wrong?

I technically did, by about 2".  But I lengthened it sideways... not lengthways.  You can see the post about half way down page 2.  I had to lengthen it to clear the fatter wheel/tire.

[monsterunderyourbed]

Jan 23, 2024 12:16:57 GMT -5 furiousbob said:

Jan 17, 2024 2:50:41 GMT -5 monsterunderyourbed said:

Did you lengthen the actual exhaust at all or did I read that wrong?

I technically did, by about 2".  But I lengthened it sideways... not lengthways.  You can see the post about half way down page 2.  I had to lengthen it to clear the fatter wheel/tire.

So the pipe length itself was not changed. Got ya, just wanted to be clear on exhaust modification.

[furiousbob]

A little update.

I've been having this issue with my fuel tank incessantly cracking at the petcock flange. At first I thought it was a faulty tank so I bought another one second hand off of eBay. After one ride, the new-used tank cracked too!

After countless days of welding, rewelding, using fuel-safe RTV and then finally calling it quits with a massive application of JB Weld, it still leaks. More cracks develop everytime.

I am chalking this up to the relocation of my rear shock's upper mount. By moving it further back to the tip of the frame, I must be flexing the frame every time I go over a bump.

My next solution to try is to cut the bottom of the tank out and weld in a 1/8" thick plate with provisions for the petcock.

I can also cut a section of tank out at the rear and run a cross brace to box up the frame at the rear.  Seems a bit farfetched, though.

FAILING THAT, the next move is to make an aluminum tank ( or possibly mild steel ) from ground up.

I'm also still battling my speed woes. Even after the 19mm Del carb swap, still stuck at ~45mph. But the fuel tank issue seems more pressing.

[furiousbob]

For any welders out there, please ignore my welding. My TIG welding is still very amateur. Lots of undercut because my heat management was all over the place.

Either way, I pressure tested it and it holds. What doesn't hold is the paper gaskets I made. I'm waiting for a new rubber gasket for the petcock in the mail.