YAMAHA 1979 YZ250 MAGNETO PULLER

[jimg1au]

hi
i need to get a internal rotor off a 1979 yz250.my puller which fitts a lot of yamahas is too big.anyone got 1 i could borrow or tell me the correct size so i can buy my own
cheers
jim

[E74]

If you go to your local motorcycle dealer and order a mcs multi fit jobbie, they have a t bar arrangement with for different threads and two bosses with to exterman threads each, you will never have to buy another one, I have just used one to remove the flywheel on my YZ400F and it worked a treat

[jimg1au]

just found some old yz250 and yz400 sevice manuals gen 1979
yz 250 m18 puller
yz 400  m27 thread puller
so any one got a m18 puller

[LWC82PE]

i think i have this same problem. im working on a YZ490 that has what i was told to be a YZ 250 (dont know what year) internal rotor ignition with hitachi CDI unit. i have looked in my MCS book and cant really see the correct puller listed. i did take a gamble and ordered one the rep told me was right but when i got it it wasnt long and hollow enough to fit over the end of crankshaft. It needs to be a 20 or 22mm? thread but the puller has to be long an hollow to fit over the end of the crankshaft thread.

[YZ250H]

Had the same problem with the 125 and 250H after buying a "universal" one that didn't fit I had to "modify" one of the arms.  Unfortunately I won't be near the workshop for a fortnigh otherwise I would post it to you.  IF you can wait i can still do that.  Cheers

[paul]

ive got a new one here i got for a xt 500  its got some   part no  numbers on it  01189

[LWC82PE]

is it a Dennis Stubblefield USA brand?

[paul]

i bought it from yamaha  so i gather its a yamaha tool

[paul]

[jimg1au]

paul
what is the dia of the puller
cheers
jim

[paul]

the batterys are flat in my digital thingys     so i ll give a rough  measurment. with the other ones
about 26/27 mm

[LWC82PE]

ok so thats no good for what i need. im pretty sure i need 20mm or might be 22, cant remember. it has to scew into an internal rotor

[facthunt]

You can make one very easily using a hollow rear axle with the correct thread.
I used an old XL/MT axle, 20mm diam, M18 thread I think.
Cut to length, clean up excess thread, drill out to give clearance over crank end and weld suitable nut on the plain end.
Screw bolt into nut and you have a puller.  This worked a treat on my 250G. Should be good for all the later
Hitachi inner rotors.

[dirttracker]

ive got one ill be in sydney on the weekend give me a ring so we can work something out
 matt