monoshock gt250/yzf

[Gil Gallad]

ok, i got the reed valve gt250 engine running fine. anyway, to the point where it will start first kick every time. now what, thinks me? i saw this monoshock swingarm off a yam yzf125r and liked the looks of it. first fit i'm very pleased with, but there's a lot of fabbing between now and the finished product. why do i keep doing this to myself?  ;D
cheers, gil.

first fit:

[edgefinder]

 Man what the heck did your yz's look like over there, your working with parts we didn't get again I bet. I stalled on a project so cutting and taking on another

[85RZwade]

FZ125, maybe?

[Gil Gallad]

sorry kids, typo  it should actually say: swingarm from a yamaha yzf 125r or yzf r125, whichever you prefer. it's coming on anyway. when i make some decent progress, apart from measuring and mocking up, i'll post a couple of photo's  8)
cheers, gil.

[Gil Gallad]

long way and a long time. all welded up and works properly. just trying to get the chain run dead on now, then hopefully the rear end will be finished  ;D
cheers, gil.
p.s. more info on the build when my new shed heater gets here. too bloody cold to type 

rear shock mount:

[m in sc]

im not sure if you are going to, but id add a gusset per side.

[Gil Gallad]

hi mark, sorry i thought i'd answered this. obviously not  across the back of the plate is another square crossmember, welded right above the shock mount. it's welded right across the plate, top and bottom, as well as welded to the diagonal frame tubes. plus the diagonal tubes sit under the top frame tubes, so they won't go anywhere. tbh, i think it's well over engineered, and anyway, it's now at the powdercoaters having a nice bright red put on it, so too late  8)
cheers, gil.

[m in sc]

ha. sweet! should be fine, im known for way over engineering stuff. love it.
looking forward to seeing the frame in a red. 

[Gil Gallad]

wait no longer. finally got the red and chrome bits back this morning. just got to wait a couple of days for the black bits. chrome powdercoating looks much better in the flesh, it looks like nickel plating. very pleased  8)
cheers, gil.

red and chrome bits:

[m in sc]

very nice.

the wheel do look really, really good

[SoCal250]

Those look really good!

[Gil Gallad]

and so it begins again  just wish the temperature would rise a bit  8)
cheers, gil.

we've started:

[Gil Gallad]

getting there. sorry i haven't got the time to commentate on everything i've done to the old girl, but as you can see, i've been busy. working on the rear brake atm, after spending several days getting the chain run right. excuse the mess. when this is finished i'll have a tidy up - promise  8)
cheers, gil.

reed valve gt250:


with rear wheel:

[50gary]

Quick note, gussets are usually placed on the 'side' of the tubes, so as not to cause a stress riser, two cents.
  Cheers, 50gary

[85RZwade]

That rear sprocket (sorry, chainwheel) looks big, Gil; are you going to trail ride that bad boy?