Thrust Washers - For YZR500

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JRConck
Posts: 133
Joined: Mon Oct 12, 2015 1:44 pm
Location: Virginia, USA

Thrust Washers - For YZR500

Postby JRConck » Mon Jul 24, 2017 7:18 pm

A rod let go in my Harris YZR so I am converting to Tz 250 parts which are generally more robust than the YZR parts. So I have been getting parts information from 1990, 1994, and 1996 parts manuals that I down loaded a while back. I have decided to go with 3xv rods, 4DP pistons etc but I have no info in the various thrust washers. On the 96 I see two different part #s for the thrust washers ?? THe washers in my Harris when I recieved it are very robust relative to what I am used to seeing, the rods are 3YL highly polished items.
I do not have the expertise or the equipment to build my own cranks so I am searching for a direction here. :?: :?:

Any insight would be greatly appreciated. :) :)

Neil Chadwick
Posts: 3
Joined: Thu Aug 10, 2017 12:33 pm

Re: Thrust Washers - For YZR500

Postby Neil Chadwick » Fri Aug 18, 2017 12:11 pm

The 3YL, 4DP,4TW and 5KE TZ250 use two different types of thrust washer. The washer nearest the crank centre is chamfered but they are both the same thickness on the 3YL,4DP & 4TW. The 5KE washers are different and thicker than 3YL/4DP/4TW. If you mix up 5KE and the earlier model washers your crank wont sit right in the cases ( on a TZ250 anyway). I learnt this the hard way.........

Neil

JRConck
Posts: 133
Joined: Mon Oct 12, 2015 1:44 pm
Location: Virginia, USA

Re: Thrust Washers - For YZR500

Postby JRConck » Mon Sep 04, 2017 1:57 pm

Anyone have the part # for 5KE thrust washers ?

JRConck
Posts: 133
Joined: Mon Oct 12, 2015 1:44 pm
Location: Virginia, USA

Re: Thrust Washers - For YZR500

Postby JRConck » Mon Sep 04, 2017 2:34 pm

Found a 5ke parts manual which shows two different part #s for the thrust washers.
90209-24327 and
90209-24316.
These are the same pt #s as the '96 4TW2 shows.
The 94 4DP4 manual shows 24327 for one washer and 24315 for the other washer.
:?: :?: :?:

Neil Chadwick
Posts: 3
Joined: Thu Aug 10, 2017 12:33 pm

Re: Thrust Washers - For YZR500

Postby Neil Chadwick » Fri Sep 08, 2017 11:40 am

I didn't realise they changed the p/n in 96/7. In that case, I can only assume that the thicker washer was too much when combined with the clearance that my crank builder likes to work to. Hence the issues with the flywheel running too close to the case wall. No idea what the clearance is on a YZR500 motor but at least you have a choice now.

Gerrit
Posts: 337
Joined: Wed Oct 07, 2015 11:02 pm
Location: Kingdom of the Netherlands

Re: Thrust Washers - For YZR500

Postby Gerrit » Fri Sep 08, 2017 4:21 pm

For what it's worth: Jörg Möller once recommended a clearance of at least 1 mm between flywheel and crankcase and I would presume that still holds good.


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