better change new eng oil soon!!

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wayne z

wayne z

Active Member
Dec 5, 2010
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Well, I got about 1 hour's running time on my new HS/chainbox from BGF. I am suprised at how quiet it is. Quite fast, bout 40mph! Needs pedal assist on takeoff and hills tho.

I modded the chainbox to run with oil bath, so I expected some metal in the oil from the sprockets wearing,and decided to chang the oil.

There was some metal in the oil but not a lot.

Decided to drain the engine too, and was I suprised!!

The oil looked like heavy metallic paint! It was all aluminum though,picked up nothing stirring it with a magnet.

I'm gonna change it every hour's running time until it clears up.

So, If you get a new engine, I don't think it's prudent to wait long at all for the first oil change.

Wayne Z
 
Dan

Dan

Staff
May 25, 2008
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Thanks Wayne, good advice.

I am curious, how many teeth did it come with for a rear sprocket? Really cool to hear about them being quiet. Thinking about trying one. I really liked the torque of the Grubee and thats just a timing belt.
 
wayne z

wayne z

Active Member
Dec 5, 2010
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louisiana
Hi Dan, The chainbox is 3.25:1 ratio, the freewheeling drive sprocket is 11 teeth. The wheel sprocket is 48 teeth = bout 14.something to one, sorta tall. I have a 54t coming ,that will get me .into the 18.something range.
 
Russell

Russell

Well-Known Member
Apr 19, 2009
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wayne z said:
Hi Dan, The chainbox is 3.25:1 ratio, the freewheeling drive sprocket is 11 teeth. The wheel sprocket is 48 teeth = bout 14.something to one, sorta tall. I have a 54t coming ,that will get me .into the 18.something range.
Click to expand...
What size chain does the 11 tooth freewheel sprocket take?
 
Dan

Dan

Staff
May 25, 2008
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Vedy interesting. (Artie Johnson) I might have to try one. Really like the chain drive and freewheeling. Engine braking kinda annoys me. Dunno, seems like a waste and extra wear n tear with no real benefit. Just a personal preference.

Thanks again Wayne
 

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Russell

Russell

Well-Known Member
Apr 19, 2009
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wayne z said:
The 11t freewheel runs with the 415 chain
Click to expand...
I realize that the freewheel sprocket came with the engine but I could find a lot of uses for a sprocket like that. Is thier any chance that you could take a picture of it as I would like to look into it further.
 
wayne z

wayne z

Active Member
Dec 5, 2010
1,743
5
38
louisiana
Russell said:
I realize that the freewheel sprocket came with the engine but I could find a lot of uses for a sprocket like that. Is thier any chance that you could take a picture of it as I would like to look into it further.
Click to expand...
cant take pix till Saturday, but I will. Look on E-bay at BGF's 4 stroke kits and you might see tr in his pix
 
scotto-

scotto-

Custom 4-Stroke Bike Builder
Jun 3, 2010
6,505
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Ridin' inSane Diego, CA.
I bought one to replace one that failed after 3,000 or so miles, $12.50 from bicycle-engines.com and I think Dax has them also. Here's a pick of the failed one I gutted and am using for an idler wheel for chain tension.

URL=http://img266.imageshack.us/i/img1174mk.jpg/]
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URL=http://img545.imageshack.us/i/img1173m.jpg/]
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My latest HS has less than 30 hrs. on it and I've changed the oil 3 times so far. The first oil change, the initial oil dump was black, lot's of metallic particles. The last change was not bad at all. Better safe than sorry.
 
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