My 500 YZR screamer project

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ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

My 500 YZR screamer project

#1 Post by ncr160 » Sun Jul 06, 2014 12:08 pm

Hello, I know there are no pictures of the progres of my bike, but I am very pleased to show you the result before painting.
This bike was built between several projects. It took 10 years but what a joy to have finally running.
His first trip was made on the circuit of Nevers Magny Cours during the meeting organized by the French 500 rdlc club.
I hope that you will appreciate and with time (lot of), I will place some additional photos.
DSCF1893m.jpg
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DSCF1899 m.jpg
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After the first main jet change
https://www.youtube.com/watch?v=J609D3Q ... e=youtu.be" onclick="window.open(this.href);return false;

The dry clutch
https://www.youtube.com/watch?v=IAhXON3POZU" onclick="window.open(this.href);return false;

And the most importantly, my friends with whom everything is possible
https://vimeo.com/100021660" onclick="window.open(this.href);return false;

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Ax-Racing
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Location: Modena (ITALY)
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Re: My 500 YZR screamer project

#2 Post by Ax-Racing » Sun Jul 06, 2014 12:23 pm

screamer means that you've change sequences of sparks every 90° ?
Alex

ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#3 Post by ncr160 » Sun Jul 06, 2014 12:38 pm

Yes I have with 2 tz 250 flywheel (one on each crank).
DSCF1617'.jpg
DSCF1617'.jpg (240.02 KiB) Viewed 6836 times
Hope to see at the French RDLC meeting next year

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Ax-Racing
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Re: My 500 YZR screamer project

#4 Post by Ax-Racing » Sun Jul 06, 2014 12:50 pm

wow !!!

how about vibration ?
did you have balancer shaft installed or kept away ?
Alex

ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#5 Post by ncr160 » Sun Jul 06, 2014 1:16 pm

I still running slowly the engine so I can't give you all the informations. But Thanks for your wow.
For the vibrations, as I kept away the balacer shaft, there are some vibrations. I don't know why but only during the deceleration (aroud 7 000 rpm).
I'll give you more information after the next setting ( main jet, curve ignition setting, air boxes, ... ) because I still have a lot of details to finish the project.

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Ax-Racing
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Re: My 500 YZR screamer project

#6 Post by Ax-Racing » Sun Jul 06, 2014 2:07 pm

Thank you very much

i'm elucubrating similar project from some month
what ignition hardware have you installed ?
Alex

Blackshaheen
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Joined: Sat Apr 01, 2006 6:55 am

Re: My 500 YZR screamer project

#7 Post by Blackshaheen » Sun Jul 06, 2014 2:41 pm

Fucking hell!!!!!!!!!! :shock: :shock: :shock: :shock: :shock: :shock:

Sorry.

Amazing :cool:

Details and lots of pictures please...

Congratulations! :D :D :D

ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#8 Post by ncr160 » Sun Jul 06, 2014 2:58 pm

For now I run with cdi units from 250 tz 4 DP40. Next week, I'll get two fully programmable units form DEVMOTO.
I'll let my impressions in a few weeks because I'm going on holiday with my childrens.

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Ronnie
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Re: My 500 YZR screamer project

#9 Post by Ronnie » Mon Jul 07, 2014 1:55 am

The ingenuity, determination and creativity on this forum never ceases to amaze me. Congratulations. C'est magnifiique! :-D

vin97
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Re: My 500 YZR screamer project

#10 Post by vin97 » Mon Jul 07, 2014 7:52 am

Awesome, the sound is amazing.
We definitely need some onboard videos, though :D

ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#11 Post by ncr160 » Thu Jul 10, 2014 3:58 am

For the onboard video, I'll probably done one in October.

For the information and details :

Frame and swing from Aprilia 250 rs with some modifions for the shock absorbers from WP.
Attachments
bras fini m.jpg
Swing finished
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bras ap ouverture m.jpg
Modification of the swing arm for the WP absorber
bras ap ouverture m.jpg (204.52 KiB) Viewed 6650 times

ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#12 Post by ncr160 » Thu Jul 10, 2014 4:01 am

TZ ingnition support for the 500 RDLC engine.
Attachments
PC190874m.jpg
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PC120892m.jpg
PC120892m.jpg (237.16 KiB) Viewed 6650 times

Helmers58
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Joined: Sun Dec 22, 2013 6:40 am

Re: My 500 YZR screamer project

#13 Post by Helmers58 » Sat Jul 12, 2014 8:07 am

Very nice work! Does the taper on the standard rd500 lower crankshaft fit the taper on the tz4dp flywheel?


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ncr160
Posts: 67
Joined: Thu Aug 09, 2007 2:32 pm
Location: France

Re: My 500 YZR screamer project

#14 Post by ncr160 » Mon Jul 14, 2014 6:31 am

For thé cracks, I have uses 2 front one but unfortunatly you have to machined it to fit thé TZ flywheel.

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Ax-Racing
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Re: My 500 YZR screamer project

#15 Post by Ax-Racing » Tue Jul 15, 2014 10:10 am

In wich way have you changed phases between the two crancks ?
you can not obtain a 90° rotation with a 31 tooth gear.....did you build a new gears ?
Last edited by Ax-Racing on Tue Jul 15, 2014 4:32 pm, edited 1 time in total.
Alex

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