What cc is this?

Angus67 · 11-01-2017, 08:38 PM

I bought a 2006 roketa for $40. Guy said its a 250
The tag says 200. Its a ohc, with leads me to believe its a lifan 250
What is it?

timcosby · 11-01-2017, 09:37 PM

in serial number maybe

wheelbender6 · 11-01-2017, 10:06 PM

I think OH cam rules out a Lifan. Maybe a Loncin.

**JerryHawk250** · 11-01-2017, 10:09 PM

Lifan made a 200cc OHC about 10 years ago. One member on here had one on an old Honda 200x.

Angus67 · 11-01-2017, 10:35 PM

The model number on the neck says 200gy. So thats that.
My crazy days are long gone. Although i still run around on my xs650 chopper. No blinks, no horn, no rfront fender.
I figure at 250 lbs, i should gear it pretty tight and stay off the road. Wich is fine. Im just looking for single track crawler.
I have plenty of street worthy bike to scare the kiddies

**JerryHawk250** · 11-01-2017, 10:42 PM

There's an engine number down by the shift lever. That will tell what you have.

humanbeing · 11-02-2017, 12:27 AM

Barrel height tells u the answer
Normal honda clone:
63.5 (196) https://item.taobao.com/item.htm?id=39517848641 | 65.5 (223) https://item.taobao.com/item.htm?id=35517374143
Weirdo 69mm:
https://item.taobao.com/item.htm?id=534858752508 | https://item.taobao.com/item.htm?id=533985048419

Weldangrind · 11-02-2017, 11:50 AM

I have that very motor and the stamp near the gearshift is incorrect. The only way for me to determine actual displacement was to remove the head and measure.

Angus67 · 11-02-2017, 11:54 AM

So what was it? Is it bore x stroke?

Weldangrind · 11-02-2017, 12:16 PM

This is what I dug up:

Quote:

Before we get to that, we pulled the motor apart last night and determined a very strange setup. The bore is a whopping 68.5mm, but the stroke is only 52.5mm; this motor is obviously designed to rev, but that's not our plan. I'm going to try to stuff a 66.2mm crank in out of a 223, which will produce a theoretical 244cc. I'm geeking out just thinking about it.

I found it here: http://www.chinariders.net/showthread.php?t=12613

Weldangrind · 11-02-2017, 12:20 PM

For the unfamiliar, one calculation is bore squared x stroke x 0.0007854 = 193.48cc

Megadan · 11-02-2017, 02:12 PM

Quote:

Originally Posted by Weldangrind

For the unfamiliar, one calculation is bore squared x stroke x 0.0007854 = 193.48cc

It should more accurately be V = πr²h, where r - Bore radius, and h =stroke.

11-01-2017, 09:37 PM	#2
timcosby Join Date: Nov 2016 Location: robertsdale alabama usa Posts: 1,007	in serial number maybe __________________ 1991 harley heritage softail classic 2016 hawk kaw h1 400 tripple 13' long chopper in progress 2009 johnny pag bar hog 2004 hd electra glide ultra classic shriner edition 1997 harley davidson 1200 sportster 1972 harley davidson amf sx250
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11-01-2017, 10:06 PM	#3
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	I think OH cam rules out a Lifan. Maybe a Loncin. __________________ "Its not WHAT you ride; its THAT you ride" Last edited by wheelbender6; 11-01-2017 at 10:10 PM. Reason: spelen
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11-01-2017, 10:09 PM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Lifan made a 200cc OHC about 10 years ago. One member on here had one on an old Honda 200x. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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11-01-2017, 10:35 PM	#5
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	The model number on the neck says 200gy. So thats that. My crazy days are long gone. Although i still run around on my xs650 chopper. No blinks, no horn, no rfront fender. I figure at 250 lbs, i should gear it pretty tight and stay off the road. Wich is fine. Im just looking for single track crawler. I have plenty of street worthy bike to scare the kiddies __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
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11-01-2017, 10:42 PM	#6
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	There's an engine number down by the shift lever. That will tell what you have. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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11-02-2017, 12:27 AM	#7
humanbeing Join Date: Mar 2008 Posts: 2,436	Barrel height tells u the answer Normal honda clone: 63.5 (196) https://item.taobao.com/item.htm?id=39517848641 \| 65.5 (223) https://item.taobao.com/item.htm?id=35517374143 Weirdo 69mm: https://item.taobao.com/item.htm?id=534858752508 \| https://item.taobao.com/item.htm?id=533985048419 __________________
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11-02-2017, 11:50 AM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I have that very motor and the stamp near the gearshift is incorrect. The only way for me to determine actual displacement was to remove the head and measure. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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11-02-2017, 11:54 AM	#9
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	So what was it? Is it bore x stroke? __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

11-02-2017, 12:20 PM	#11
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	For the unfamiliar, one calculation is bore squared x stroke x 0.0007854 = 193.48cc __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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