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Old 07-09-2007, 09:33 AM   #16
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[quote=CIMRI;3468016]
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Is the crackshaft black coated?

-> yes.. But now.. only coating in crankshaft head by GR Racing

and.. the crankcase is os 5port crankcase (OS coated)[/QUOTE

awsome wrk. did you drove other engines from Gr. can you advise me another work from him. acctually ill try one of them. but dont now which is better? and cant understand from korean website! Im owner from
os speed specII. and nova 353. I was planning to buy another.
yes i used other egines from GR.

Rex 3/5port, novarrossi NSR 5, LS3 etc on..

But i did not try novarossi Plus, 353..


and i quess OS engine had more modified effect than novarrosi.

( this is my quess
OS normal 100% power -> GR modified 150% power
novarrosi normal 100% power -> GR modified 130% power.)


i showed RRR with os speed specII in last weekend.

But RRR did not catch me in top speed... (i used GR OS 12TZ 3port)
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Old 07-09-2007, 09:39 AM   #17
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[QUOTE=gansei;3468033]
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yes i used other egines from GR.

Rex 3/5port, novarrossi NSR 5, LS3 etc on..

But i did not try novarossi Plus, 353..


and i quess OS engine had more modified effect than novarrosi.

( this is my quess
OS normal 100% power -> GR modified 150% power
novarrosi normal 100% power -> GR modified 130% power.)

thnx for information. I'll contact him and send pm.


i showed RRR with os speed specII in last weekend.

But RRR did not catch me in top speed... (i used GR OS 12TZ 3port)
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Old 07-09-2007, 09:41 AM   #18
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Default Gr mod

thnx for information. I'll contact him and send a pm.
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Old 07-09-2007, 09:45 AM   #19
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Gansei,

which pipe did you use with this engine?

thnx
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Old 07-09-2007, 10:01 AM   #20
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Gansei,

which pipe did you use with this engine?

thnx
i always used novarossi 2630 pipe (5mm)

and i tried GPX 6mm pipe in recent days.

But for too much torque.. i could not drive stable in corner out.

so i changed to 2630.. mild acceleration and awesome top speed was good!!
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Old 07-09-2007, 11:59 PM   #21
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Where can you buy GS engine online?
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Old 07-10-2007, 12:25 AM   #22
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Quote:
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Where can you buy GS engine online?
http://www.grracing.co.kr

But it is korean language version..

english version is under construction..

you can buy it by contact to hand piece... send PM or Email..
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Old 07-10-2007, 01:13 AM   #23
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Quote:
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Where can you buy GS engine online?
and.. handpiece will sell GR Enging in E-Bay in sooner or later
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Old 07-10-2007, 01:14 AM   #24
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handpiece,

you got a pm
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Old 07-10-2007, 01:49 AM   #25
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GR Engines on Ebay!!!


http://cgi.ebay.com/OS-12TZ-3-P-GRra...QQcmdZViewItem

http://cgi.ebay.com/OS-12TZ-5-P-GRra...QQcmdZViewItem
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Old 07-10-2007, 03:54 AM   #26
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Very nice finishing.
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Old 07-10-2007, 04:13 AM   #27
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@ handpiece : check your post box.

@ gansei : Is the engine cooling head, Os head and only read anodaised?
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Old 07-10-2007, 05:56 AM   #28
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Quote:
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@ handpiece : check your post box.

@ gansei : Is the engine cooling head, Os head and only read anodaised?
@ gansei : Is the engine cooling head, Os head and only read anodaised?

=> yes... red anodaised
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Old 07-10-2007, 04:58 PM   #29
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Quote:
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http://www.grracing.co.kr

But it is korean language version..

english version is under construction..

you can buy it by contact to hand piece... send PM or Email..
Thanks Gansei, I'm tempted because its OS-based ... I like them because they're so easy to tune and just runs and runs.

Mind you, once modded, it might be a different story - do you find these easy to tune? (OK, I know you'll be biased - you're sponsored by them ) so don't need to answer that.
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Old 07-10-2007, 08:57 PM   #30
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Quote:
Originally Posted by Sow&Steady View Post
Thanks Gansei, I'm tempted because its OS-based ... I like them because they're so easy to tune and just runs and runs.

Mind you, once modded, it might be a different story - do you find these easy to tune? (OK, I know you'll be biased - you're sponsored by them ) so don't need to answer that.
yes.. GR OS TZ is easy to tune...

as you know.. OS engine must have more IDLE RPM than Novarossi.

enough mixture setup also is needed..

pls use 0.3mm head gasket in break-in course

and use 0.2mm head gasket in Fuel nitro 25~30

and use 0.1mm head gasket in Fuel nitro under 20%


i used GR OS TZ (0.1mm) in 2007 FEMCA..
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