TZR 421 from France

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etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 385 from France "Stroker+4 YPVS in a 125 Belgarda Fr

#31 Post by etienne24II » Thu Oct 10, 2013 7:35 pm

the Cr vibrates so much, that you could'nt ride more than 10 minutes on the SDR
But... :smt003
the next level: sabertooth 510 on trx (it could be ready this winter)
and you forget the cr [smilie=fun.gif]
forever :smt004 :smt040
the 330 overtakes best 350LCs and some 500 Cr, so the sabertooth... :smt033

At this day, and we are only two in France to own a SDR, the other guy keeps it genuine, on his salon! Not mad


I prefer to ride mine (and I fell off at 100MPH two month ago)

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#32 Post by etienne24II » Sun Feb 23, 2014 8:16 pm

2014
I put a stroker +4/115 with revisited Athena 68mm cylinders
It sounds great, with v-force 4, PWK 35 air striker
a lot of work on dyno today, d..ned highly modified clutch such a mess...even my 8 disc one doesn't like the big amount of torque on such a thin range of rpm's...So I put the lock-up, I especially don't want to ride on road races where tsunami on gear box ain't welcome...I think of amelioration of the lock-up fluidodynamism.
Here's the engine with stock modified 7 plates clutch
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an overview of the painting...

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:smt002

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#33 Post by etienne24II » Mon Mar 10, 2014 3:40 pm

Stock Cheetah cub 421 on full Avgas, with stock 1WT 1987 ignition, RDZ small bore inframe pipes VS my Athena 421 highly modifed, also stock RZ 1987 Ignition (1UA-50) with Shearer big bore out of frame pipes...
Couldn't try the RDZ in frame on my TZR.
Shearer small bore on pending order.
Tremendously spanked by the CUB, but I'm pretty happy! Sounds good for my road championship! :smt020

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THe device is very pessimistic, to situe, Best stock NX4 with Vforce makes 33.3 rwhp :smt025

User avatar
ruka
Posts: 359
Joined: Mon Nov 30, 2009 8:15 pm

Re: TZR 421 from France

#34 Post by ruka » Sat Mar 15, 2014 10:26 am

Looking good Etienne :smt023

I have a question.
In wich bike are you turning better laptimes?
The 421 or the 330?

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#35 Post by etienne24II » Sun Mar 16, 2014 4:53 pm

Around a second and a half better with TZR 385 (ypvs highly modified barrels) on a 1'20" track
This engine (+4 stroker) makes 54 hp on this dyno

The sdr was 42 true hp during this year.

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#36 Post by etienne24II » Sun Mar 16, 2014 5:18 pm

Shearer pipes out of frame small bore on pending order... :smt004

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#37 Post by etienne24II » Fri Jul 11, 2014 8:18 pm

:smt006
Here's a quick ride of my Athena stroker on French regional road championship :smt002

http://youtu.be/L6iLo_uCfwk?t=1m11s" onclick="window.open(this.href);return false;

To complete, I say welcome to the Cheetah Cub :smt007
See some pics to compare, The cub is a +4mm stroke cylinder block, brand new from TDR
Athena are a stock stroke design cylinders, revisited by my little hands, 8 hours of ride.

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Straight cut transfert port like old school TZ :smt012
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User avatar
ruka
Posts: 359
Joined: Mon Nov 30, 2009 8:15 pm

Re: TZR 421 from France

#38 Post by ruka » Sat Jul 12, 2014 4:51 am

The bike sounds really crisp and healthy Etienne.
If you don´t mind me asking what oil did you use on those 8 hours riding the cylinder kit. Elf 976 I suppose?

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#39 Post by etienne24II » Sat Jul 12, 2014 12:19 pm

That's right, ELF 976+ at 30:1, mix Avgas/unleaded 98 ratio 50/50
I bought some 909, I'll try it on my RS honda 125 in two weeks at the Open Trophy in Belgium.

etienne24II
Posts: 31
Joined: Sun Jan 09, 2011 7:50 am
Location: Brittany, France

Re: TZR 421 from France

#40 Post by etienne24II » Sat Jan 28, 2017 9:16 am

Hi there,
The bike goes well as you can see
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Shearer pipes has been modified since

and a new comer is born (also for road races :smt033 )

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I built a TZ327 (TRX 250R) last winter, from a destroyed TZ125JT001 and a CR 363 sphinx on 2015, both for road races.
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:smt002

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