Question about pushrod engines

Ascot500 · 06-07-2008, 03:19 PM

As I understand it the pushrod engines (at least the smaller ones) are based on a Honda CG125. But it seems that even the engines up to 200cc are also derivative.
First question: even if you can't see the top of the head, does that circle just above the crank case indicate that it's a pushrod type?

Second question: Is the bolt spacing the same on all the pushrod engines from 125 to 200cc ?
Thinking about the possibility of an upgrade....

TeamCheap · 06-07-2008, 03:27 PM

I was going to just link to where I had posted it before but decided to cut and paste just for you. :wink:

To answer your first question : NO
second question : I really dont know I havnt had each of them here to compare.

Over Head Camshaft engines are easy to spot.
Look for the round or roundish cover near the top of the engine on the left side.

The pushrod engines we have just have one large cover on the top of the cylinder head that needs to be removed to adjust the valves.

As a rule the OHC engines will have a round or roundish cover on the top left side of the cylinder which allows the OverHeadCamshft to be accessed.

Ascot500 · 06-07-2008, 03:58 PM

Thanks for the response.
I knew about checking the top end.
The trouble is that on a lot of the dual sport bikes, it's impossible to see the engine top from photos on the web.
So if you want to buy one off a web site, you'll have to ask the reseller.

Fat chance of getting an accurate answer.

TeamCheap · 06-07-2008, 04:19 PM

yeah i hear what your saying but you really cant be sure by just looking at the lower side unless you have seen every engine out there.

kens97sto171 · 06-08-2008, 02:38 AM

Well.. I am pretty sure that the OHC engine DOES NOT have the little round thing you pointed out in your first question.. So if you can see a pic that has the lower half of the engine.. you may be able to tell.

Ken

red2003 · 06-08-2008, 07:36 AM

Actually, the answer to his first question is "YES". That "circle above the crankcase" is the cam. Easily spottable, and a sure sign it is the pushrod version of out engines.

06-07-2008, 03:19 PM	#1
Ascot500 Join Date: Apr 2007 Posts: 90	Question about pushrod engines As I understand it the pushrod engines (at least the smaller ones) are based on a Honda CG125. But it seems that even the engines up to 200cc are also derivative. First question: even if you can't see the top of the head, does that circle just above the crank case indicate that it's a pushrod type? Second question: Is the bolt spacing the same on all the pushrod engines from 125 to 200cc ? Thinking about the possibility of an upgrade....
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06-08-2008, 07:36 AM	#6
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,228	Actually, the answer to his first question is "YES". That "circle above the crankcase" is the cam. Easily spottable, and a sure sign it is the pushrod version of out engines. __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
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06-07-2008, 03:27 PM	#2
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	I was going to just link to where I had posted it before but decided to cut and paste just for you. :wink: To answer your first question : NO second question : I really dont know I havnt had each of them here to compare. Over Head Camshaft engines are easy to spot. Look for the round or roundish cover near the top of the engine on the left side. The pushrod engines we have just have one large cover on the top of the cylinder head that needs to be removed to adjust the valves. As a rule the OHC engines will have a round or roundish cover on the top left side of the cylinder which allows the OverHeadCamshft to be accessed.
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06-07-2008, 03:58 PM	#3
Ascot500 Join Date: Apr 2007 Posts: 90	Thanks for the response. I knew about checking the top end. The trouble is that on a lot of the dual sport bikes, it's impossible to see the engine top from photos on the web. So if you want to buy one off a web site, you'll have to ask the reseller. Fat chance of getting an accurate answer.
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06-07-2008, 04:19 PM	#4
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	yeah i hear what your saying but you really cant be sure by just looking at the lower side unless you have seen every engine out there.
	0

06-08-2008, 02:38 AM	#5
kens97sto171 Join Date: Mar 2007 Posts: 193	Well.. I am pretty sure that the OHC engine DOES NOT have the little round thing you pointed out in your first question.. So if you can see a pic that has the lower half of the engine.. you may be able to tell. Ken
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