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Clubroom => Tech Talk => Topic started by: evo550 on January 05, 2015, 05:54:36 pm

Title: Cr500 power valve ?
Post by: evo550 on January 05, 2015, 05:54:36 pm

Did Honda ever fit power valves to the CR 500's ? Or is ADB not checking their facts again..

Title: Re: Cr500 power valve ?
Post by: smed on January 05, 2015, 06:23:19 pm

Maybe on the works RC's but not on production CR500's :)

Title: Re: Cr500 power valve ?
Post by: Hoony on January 05, 2015, 06:35:52 pm

As smed said. They never got valves unlike the KX500

Title: Re: Cr500 power valve ?
Post by: evo550 on January 05, 2015, 06:44:01 pm

Thought so, just reading the ADB comparo between a CR500 and CRF450. Not only does it have a power valve, but it's engine parts wear put quicker than the 450's as well. I don't know why I buy ADB any more.

Title: Re: Cr500 power valve ?
Post by: smed on January 05, 2015, 06:59:42 pm

Young pups brainwashed by the 4T myth ;)

Title: Re: Cr500 power valve ?
Post by: Moto on January 05, 2015, 10:27:08 pm

I read that test as well today and thought what a pile of crap.
The "who's got what" column by the ADB technical editor Mat Boyd has gems like.......

The rider has to mix fuel and oil on the 500 but only has to pour in straight fuel on the 450R.

The CR 500 uses a Capacitor Discharge Ignition (CDI) but the CRF450R runs off a fully transistorised ignition.

The CR500 engine has an exhaust power valve to smooth out the power delivery but Honda doesn't use them on its four stroke dirt bikes.

These are just a few Jems from the technical editor.
I have every edition of this magazine and maybe it is time to move on,especially when the first TEN pages are ads.

Title: Re: Cr500 power valve ?
Post by: Lozza on January 05, 2015, 10:31:29 pm

Fire off a stern condesending email with lots off tut tutting. From a 5min  google image search not even water cooled RC 500's had powervalves. Andre Malherbe had no  sissy pv  ;D

(http://www.mastercross.net/jpeg_e_gif/db/img-84804044.jpg)

Title: Re: Cr500 power valve ?
Post by: mainline on January 05, 2015, 11:02:55 pm

I can't see why anyone still buys the mag with the competition that's available.

Title: Re: Cr500 power valve ?
Post by: evo550 on January 06, 2015, 01:56:56 pm

Quote from: Moto on January 05, 2015, 10:27:08 pm

I read that test as well today and thought what a pile of crap.
The "who's got what" column by the ADB technical editor Mat Boyd has gems like.......

The rider has to mix fuel and oil on the 500 but only has to pour in straight fuel on the 450R.

The CR 500 uses a Capacitor Discharge Ignition (CDI) but the CRF450R runs off a fully transistorised ignition.

The CR500 engine has an exhaust power valve to smooth out the power delivery but Honda doesn't use them on its four stroke dirt bikes.

These are just a few Jems from the technical editor.
I have every edition of this magazine and maybe it is time to move on,especially when the first TEN pages are ads.

...and "cr500 engine parts wear out quicker than the crf 450"