Manky Monkey Motors

hi all . not quite ready to start a thread on my chopper project yet as i am still gathering bits , but i was trying a gsx back wheel into the frame of a gpz 550 and the first obvious thing is that the sprockets do not line up as the gpz engine is narrower that the gsx ,
Option 1 to move the block over but this would unbalance the bike and look a bit odd
option 2 would be to  ;machine down the sprocket carrier somehow
Option 3 if i take a front brake disc of a car and bolt it wear the sprocket originally went  and then attach  the sprocket onto the main disc part thus bringing the sprockets back into line . if this is just a stupid idea let me know or if anyone has done this before let me know if it was any good
cheers  ;D

hhmmm was doing ok til option 3.
would you like to clarify that a little ??? are you talking of engine sprocket ??? to fit the car front disc on to the main output shaft ???

or have i missed something ::)

 ;D ;D

Confused me a little too Pete. I was hoping someone else would ask before I had to make myself look dumb by enquiring further!  :P

Sounds to me like he's talking about using the brake disc as some kind of spacer?  Not sure how though!

ok so i might need to explain option 3  a little better

take a standard gsx wheel with cush drive attached but sprocket removed , then ( my god i should be on blue peter ) take a front brake disc from a feista or nova and attach this using the sprocket studs so that the actual disc part is positioned closer back towards the wheel and then re-attach the rear sprocket onto the disc face in line with the front sprocket. now i know this would involve some machining but unless there is a norrower cush drive that would fit a gsx back wheel ?

I understand what you're saying now & I can't see why it wouldn't work, though it might raise a few eyebrows at the MOT station. As long as it's securely mounted though, shouldn't be a problem. Can't help thinking there must be a less convoluted answer though.

Nope, I still can't see it!  In my imagination that pushes the sprocket even wider.....

Oh well, tisn't something I'll be tackling any time soon so I think my best plan is I won't worry about it!

bikergran imagine the disc turned around to face in wards . ok take the front nearside of car , take off the wheel and you will see the disc faces in , take the disc of and fit onto rear sprocket carrier in the same way so it brings the disc closer the the wheel hub . i know this may be a long winded way of getting modern wheels onto my chop but i wasnt wanting to use the old gpz units . oh and mankey monkey i have almost finished my frame jig  just awating the head stock holder and cones from the machine shop and i should be good to go 

Great! So you'll be sending us a techy write up on building the jig & the frame then?  ;D

Yeah, that would work. What distance mis-alignment are you talking of 10mm 20mm? can you fit the caliper as well to have brake working on the same side/disc/sprocket..."disc-ket" ? could the engine/g-box sprocket be moved out to line up with existing rear sprocket? will chain clear tyre?
good luck with it ;D

Those were my thoughts too.  Not that I've ever built anything you understand, just that I am cursed with a logical brain which doesn't always make the leap.......   ???

not that i have done precise measurements but it looks about 40 mm pete , it would be imposible to fit the caliper onto the same side as the chain and sprocket would get in the way . the output shaft probably can be  extended but as i dont want to strip the gear box this was the only way i could solve the problem but as this may be a completely stupid idea and may have to wait till project number 2 ( zx650 chopper only  because i have the bits not because i have a thing for kawas )   as the 650 is a wider block than the 550 . and i do have wheels to fit but they have drum brakes and id prefer discs cause it would be easier to fit the forward controls