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Gilera CX125s
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Weed



Joined: 29 Dec 2013
Posts: 134
Location: Perth Australia

PostPosted: Fri Aug 11, 2017 1:48 am    Post subject: Reply with quote

Head for the hills. The CX has been on the dyno.

Very Happy
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trev45



Joined: 15 Jun 2011
Posts: 352
Location: Sydney Australia

PostPosted: Fri Aug 11, 2017 7:54 am    Post subject: Reply with quote

The beast is alive , sing little birdie

Cheers Trev
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Bud977



Joined: 03 Mar 2013
Posts: 324
Location: Sydney

PostPosted: Fri Aug 11, 2017 9:13 pm    Post subject: Reply with quote

What's going on with that dip up the top end?
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Weed



Joined: 29 Dec 2013
Posts: 134
Location: Perth Australia

PostPosted: Fri Aug 11, 2017 11:04 pm    Post subject: Reply with quote

It's a 2 stroke is the most logical explanation I've been given so far. Smile

We dropped the needle 1 notch for the blue run as she was running rich, but I didn't have any other main jets to try. That's the next plan
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Bud977



Joined: 03 Mar 2013
Posts: 324
Location: Sydney

PostPosted: Sat Aug 12, 2017 10:10 pm    Post subject: Reply with quote

Weed wrote:
It's a 2 stroke is the most logical explanation I've been given so far. Smile


Sounds about right! Do they have a powerjet circuit or a powervalve that cuts in at the top?
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Weed



Joined: 29 Dec 2013
Posts: 134
Location: Perth Australia

PostPosted: Sun Aug 13, 2017 12:28 pm    Post subject: Reply with quote

Yes mate. The power valve comes in at about 8K revs. Nothing fancy just a straight solenoid activation that gives you all or nothing.
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Admin
Site Admin


Joined: 22 Oct 2007
Posts: 363
Location: Stafford, UK

PostPosted: Sun Sep 03, 2017 8:20 pm    Post subject: Reply with quote

Hi

The 2nd kick at around 11k is noticeable when riding it.

The power valve is quite a nice system. It is a bit like a cross between the Yamaha YPVS system used on the RD350 and the like, and the Honda ATAC system. Is is a barrel that rotates, lowering or raising the exhaust port. But when it is in the closed / low revs position the cutout in the rotating barrel has rotated enough to uncover a chamber above the exhaust port.

All the best

Katy
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Weed



Joined: 29 Dec 2013
Posts: 134
Location: Perth Australia

PostPosted: Tue Sep 12, 2017 3:00 pm    Post subject: Reply with quote

Yes Katy, it is a fun bike
Cheers
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