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| 4 Stroke Bicycle Engines & Kits 4 stroke motorized bicycle engine kits are great if you want reliability or do not want to mix your oil and gas. Learn from each other how to get the most out of your 4 stroke bicycle engine |
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12-12-2008, 12:17 AM
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Motorized Bicycle Senior Technologist
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Join Date: Jul 2008
Location: Asia
Posts: 415
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Build your own 32cc V-twin 4 stroke engine
Has anybody ever thought of building their own V-twin engine and put it in a chopper?
here's the engine:
JEH - "Howell V-Twin" Engine page
Specifications:
Flywheel Diameter: 4"
Cylinder Bore: 1"
Piston Stroke: 1-1/4"
Compression Ratio: 5:1
Displacement: 1.96 C.I. (32cc)
RPM Range: 800 - 4,500
Height: 6.9"
Width: 8.3"
Length: 5.8"
Anybody from Colorado to check this out?
Your thoughts please...
Thanks...
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Regardless if it's left or wrong, the opposite is always right.
Caution: This hobby is habit forming.
Last edited by Technocyclist; 12-14-2008 at 08:30 PM.
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12-14-2008, 12:37 PM
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Motorized Bicycle Elite Member
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Join Date: Sep 2008
Location: RainCity
Posts: 970
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Re: 31cc V-twin 4 stroke engine
Wow, I wonder how many hours it would take me to make that! w/ all due respect I wouldn't put it in a chopper.
Or even 3Hp Bill JEH - "1906 Bill" Engine page
Last edited by tyrslider; 12-14-2008 at 12:46 PM.
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12-14-2008, 12:49 PM
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Motorized Bicycle Elite Member
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Join Date: Jun 2008
Location: Longmont, CO
Posts: 1,596
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Re: 31cc V-twin 4 stroke engine
Very cool.
I'm curious how much power it would be able to put out for a bike.
A little small, but you would definitely need wide cranks.
Creative Engineering should take a whack at this...maybe even modify it to be 49cc  He's probably one of the few of us that would have the proper tools and knowledge to make one of these.
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12-14-2008, 08:08 PM
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Motorized Bicycle Elite Member
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Join Date: Sep 2008
Location: RainCity
Posts: 970
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Re: 31cc V-twin 4 stroke engine
He says it's all from round stock I don't see anything from the picture I can't make on a mill & lathe. It's the time it takes!
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12-14-2008, 08:37 PM
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Motorized Bicycle Senior Technologist
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Join Date: Jul 2008
Location: Asia
Posts: 415
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Re: 31cc V-twin 4 stroke engine
Quote:
Originally Posted by jasonh
Very cool.
I'm curious how much power it would be able to put out for a bike.
A little small, but you would definitely need wide cranks.
Creative Engineering should take a whack at this...maybe even modify it to be 49cc  He's probably one of the few of us that would have the proper tools and knowledge to make one of these.
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Yes, I do hope Creative Engineering would see this thread. He has all the tools and knowledge to build one of these babies, not to mention the expertise too. But I don't think he has the time to build one... :-(
__________________
Regardless if it's left or wrong, the opposite is always right.
Caution: This hobby is habit forming.
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04-18-2010, 12:13 PM
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Motorized Bicycle Elite Member
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Join Date: May 2009
Location: Elkhart, IN
Posts: 189
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Re: 31cc V-twin 4 stroke engine
no valve covers?
no pushrod tubes?
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04-18-2010, 09:32 PM
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Motorized Bicycle Senior Member
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Join Date: Jul 2009
Location: Far Northern N.S.W Australia
Posts: 86
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Re: 31cc V-twin 4 stroke engine
Many early engines did not have either pushrod tubes or rocker covers ,these early motors had a total loss oiling system that had a hand operated pump , this engine is a model ,not sure what the belt drive is for tho..
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04-18-2010, 10:03 PM
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Motorized Bicycle Elite Member
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Join Date: Aug 2009
Location: KCMO
Posts: 2,289
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Re: 31cc V-twin 4 stroke engine
Its for cooling fans,in the write up
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04-18-2010, 10:31 PM
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Motorized Bicycle Elite Member
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Join Date: Aug 2009
Location: KCMO
Posts: 2,289
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Re: 31cc V-twin 4 stroke engine
Wow ,,,You need to look through the whole site ,they got lots of kool stuff,even electronic ignition set-ups ,I think that adjustable ignition is possible
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04-18-2010, 11:09 PM
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Motorized Bicycle Senior Member
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Join Date: Jul 2009
Location: Far Northern N.S.W Australia
Posts: 86
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Re: 31cc V-twin 4 stroke engine
Yeah ... the engine sounds a lot more useable than I first thought , full oil system ,all ball bearing , very interesting ,Id put that on a bike no probs , the Builder even suggests it could be used for powering a bike .
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