RZ500S 1VW Canada 1986

RZ-RD-RZV.... and everything in between

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jackson.40
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RZ500S 1VW Canada 1986

#1 Post by jackson.40 » Thu Jul 17, 2008 2:16 pm

Only 150 RZ500S were made in November 1985 as a 1986 model for the Canadian market only.

The engine was built with some engine modifications listed below.

Here is the link to the parts list for this model.

http://www.rzv500r.net/HTML/RZ500N-Fiche.htm

If you look at B5 and B6 you will see that the upper crank has a added flywheel fitted and a different balance shaft which was run off the upper crank.Also look at C9 as it shows the different cover needed to fit the extra flywheel in,and because of the different cover the autolube pipes run outside instead of thru the cover.I have checked all the 1vw part numbers needed to do these modifications and the only one still available is 1vu1541400 which is part of the cover.Here is the only photo we have so far from one of these engine taken by Bill Wilson.
This is the standard upper crank

Image

And here is the modification to the upper crank to fit the extra flywheel.

Image
Last edited by jackson.40 on Sun Mar 01, 2020 1:04 pm, edited 1 time in total.

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#2 Post by smurph » Thu Jul 17, 2008 2:48 pm

Notice the aluminum seal adapter in the S engine photo. This allowed Bill to use a front crank stator side seal in place of the original NLA one piece seal. Nice work there Bill.

One could duplicate the S model rear crank by using a 47x front crank snout and machining it. I was really wanting to do this at one point but lack of dimensions of the snout and flywheel kept me from the goal. Bill, you didn't happen to measure any important features, did you?

Steve
Fuel Injected RZ350

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#3 Post by jackson.40 » Sun Sep 07, 2008 4:14 am

After a bit of searching i have found a photo of this very rare extra rear crank flywheel.

You can read more about these cranks here.
http://www.rzrd500.com/500phpBB3/viewtopic.php?t=8807


Image
Last edited by jackson.40 on Sat May 29, 2010 6:26 am, edited 1 time in total.

lcjonny
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odd crank

#4 Post by lcjonny » Sat Nov 15, 2008 2:53 pm

Just what benefits would this crank arrangement give over the usual layout?
Jon

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#5 Post by smurph » Sat Nov 15, 2008 6:00 pm

Well... My theory is that the rear flywheel, and the fact that the balance shaft is driven from the rear crank, is trying to equalize the inertial energy of the two cranks. The front crank has the stator flywheel and the rear crank has the smaller flywheel plus the balance shaft. It should reduce the lash bounce on the drive gears when the engine is free spinning.

Steve
Fuel Injected RZ350

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#6 Post by Ken Smith » Sat Nov 15, 2008 10:39 pm

Have a 86 RZ500, looked for one for quite awhile. It seems to run smother than my 85 or 84. See members rides for a few pis. also some pis of the rear over and what it looks like together.

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#7 Post by jackson.40 » Tue Dec 30, 2008 12:58 pm

Just been looking back over the archived post and came across this post.

Posted: Sun Feb 01, 2004 2:52 pm Post subject: another production question

--------------------------------------------------------------------------------

I have 2 RZs both built in 11/84 one has an extra flywheel on the upper crank(4714) the other does not(4929). Oh, and the engine and frame #s match.
Anyone care to explain..............?

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#8 Post by smurph » Tue Dec 30, 2008 1:11 pm

I can explain. Aliens... It has to be the aliens. :grin:

Steve
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#9 Post by jackson.40 » Tue Dec 30, 2008 2:09 pm

You are not taking this very seriously Steve :grin:

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#10 Post by gus » Wed Feb 18, 2009 9:26 pm

looking at the print they still drive the balancer off the front not the rear!

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#11 Post by jackson.40 » Wed Aug 12, 2009 6:52 am

This model also has some changes to the brackets as per the photo`s.

Upper coil bracket,The original bracket 47X2135Y00 is on the right and the 1VU2135Y00 is on the left.This bracket can be found on some 1GE model bikes as well.

Image


Two Stroke oil sub tank bracket,The original bracket 47X2172L00 is at the top 1VU2172L00 is on the bottom.

Image

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#12 Post by Andrew » Wed Aug 12, 2009 9:36 pm

A flywheel is not normally related to crank balance/vibrations, more for smoothing torque control.
Strange :shock:
Did the 500GP bikes experiment with additional flywheels around that time??? Could it be a spin off from GP development :shock:
Strange :shock:

:grin:
Andy (UK)
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#13 Post by DonH » Thu Feb 04, 2010 3:28 pm

Hello new to forum, first post. just picked up canadian model that is second from last production serial number range. it has the balancer on rear crank design. lots of problems, plan to paint frame, detail motor and get it running. need a new fairing, seat cowl, belly pan for cosmetics. great site

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#14 Post by jackson.40 » Thu Feb 04, 2010 3:39 pm

Hello Don and welcome,I would love to see some photos of the bike :cool:

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#15 Post by DonH » Thu Feb 04, 2010 6:02 pm

Just got the bike last monday. Bike is in rough shape and mostly appart. Ive taken pics of process and plan to post.

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