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View Full Version : Quiz photo of the Day: Can you identify this cylinder?


jon370r
03-31-2006, 03:52 PM
Can anyone correctly identify this cylinder?
jon370r
03-31-2006, 03:52 PM
closer view
Meat
03-31-2006, 03:57 PM
Thats a "black ATAC special" sold by Klemm Research back in the late '80's. :chinese:

:p :p
jon370r
03-31-2006, 04:02 PM
Guess again. They may hve sold them but it was not its origional application.
450RGNCC
03-31-2006, 04:20 PM
...stock...:o just kidding, I have no idea
Cr85rRida
03-31-2006, 04:31 PM
looks like a big bore motor???
jon370r
03-31-2006, 04:43 PM
Not a big bore, its 246cc's. You can't make it out in the pic. but it cast on the side of the reed cage area.
Cr85rRida
03-31-2006, 05:17 PM
Ok lets try this

Automatic Torque Amplification Chamber

Found on the 1984 and 1985 CR250R's

When you said 246 cc it gave it away

"Engine: Liquid-cooled two-stroke 246cc with ATAC™
Power: 43 hp
Brakes: Drilled front disc
Wheelbase: 1475mm (58.1 in.)
Dry weight: 95.8 kg (211.1 lb)
Seat height: 960mm (37.8 in.)
Front wheel travel: 305mm (12 in.)
Rear wheel travel: 310mm (12.2 in.)
The serial number began JH2ME0304EC600001."

:blah:
matt250r21
03-31-2006, 05:19 PM
1984 CR 250?
Mechanix311
03-31-2006, 08:30 PM
darn cr85rider you beat me too it. I wonder why they used a early moder cr cylinder. From what i hear they have sorry port layouts.
jon370r
03-31-2006, 09:22 PM
Ding Ding Ding We Have a winner. Yes 1984-1985 CR250 cylinder. It was the Genissis of our beloved ATC/TRX 250R engine. I has the same port layout as the 1985-86 250R but it has extra cooling capacity around the exhaust port. If only Honda had based the 250R engine in the 86 CR HPP powervalve design. That would have made the world best quad even so much better than what it was and still is.