OzVMX Forum

Marque Remarks => Suzuki => Topic started by: LegOwt on May 20, 2015, 11:44:50 am

Title: 1986 RM250 rotor nut left hand thread?
Post by: LegOwt on May 20, 2015, 11:44:50 am

Manual doesn't say anything about the rotor nut on a 1986 RM250.

Anyone know for sure if its LH or RH thread?

(http://www.trick.com.au/rotor.jpg)

Also I bought a rotor puller from ebay but it doesn't look like its going to fit - its a 27x1.0 Lh Ext. but was listed as correct for 86 RM250.

Appreciate comments on that too :)

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: D project on May 20, 2015, 12:52:57 pm

Should be anti clockwise thread. The puller you've probably bought is to suit the earlier style flywheels with three bolt holes so it's not gunna work.

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: LegOwt on May 20, 2015, 03:48:51 pm

Can't believe I cannot find a flywheel puller for this in Australia...its the 8 hole disc type probably universal with a lot of other early 2 strokes. Anyone have any info to help?

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: pmc57 on May 20, 2015, 10:27:45 pm

Looks like it's R/H thread to me, you can just see the thread lead-in in the nut and on the end of the shaft. Most end-of-crank threads on the left side of motor are R/H thread, only the R/H side of crank like some of the primary drive nuts are L/H thread.

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: Lozza on May 21, 2015, 07:48:16 am

I think you would need a 'smacker' puller. A thick bit of plate with a 20mm nut welded to it and 16mm hole in the centre. Then 2 holes for bolts to go into the rotor M6?? tapped holes. A bit of bronze between the end of the crank and the 20mm bolt that will go into the nut. Then preload the bolt and then hit it with a copper hammer, preload again smack with hammer rinse repeat until it comes off.

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: LegOwt on May 21, 2015, 08:15:20 am

Good info - thx Lozza

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: GMC on May 23, 2015, 08:20:27 pm

Quote from: Lozza on May 21, 2015, 07:48:16 am

I think you would need a 'smacker' puller. A thick bit of plate with a 20mm nut welded to it and 16mm hole in the centre. Then 2 holes for bolts to go into the rotor M6?? tapped holes. A bit of bronze between the end of the crank and the 20mm bolt that will go into the nut. Then preload the bolt and then hit it with a copper hammer, preload again smack with hammer rinse repeat until it comes off.

That sounds really makeshift and dodgy ;D :D

(http://i15.photobucket.com/albums/a393/gmcloa/Misc%20bike%20stuff/Kawasaki%20flywheel%20puller_zpsl4iknjxf.jpg) (http://s15.photobucket.com/user/gmcloa/media/Misc%20bike%20stuff/Kawasaki%20flywheel%20puller_zpsl4iknjxf.jpg.html)

Pretty sure I built this 3 bolt version in 86 for my 200, still use it today on other Kawasakis

Title: Re: 1986 RM250 rotor nut left hand thread?
Post by: DR500 on May 23, 2015, 08:25:12 pm

rh thread . use a harmonic balancer puller with 8mm bolts