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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

Hi there, looking to buy first motor bike kit.


Discussion at Motorized Bicycle Engine Kit Forum in the 4 Stroke Bicycle Engines & Kits forum. I recently got a new job that is very nice and only a couple miles away from my home so ...
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Old 09-24-2009, 03:35 PM
Motorized Bicycle Newbie
 
Join Date: Sep 2009
Location: vermont
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Default Hi there, looking to buy first motor bike kit.

I recently got a new job that is very nice and only a couple miles away from my home so instead of driving a car I thought I'd look into a motorized bike. I like the idea of a 4 stroke and not having to mix oil and gas and just being able to pull up to a gas station.

My budget range is about 200-350$ for a 4 stroke kit, but if there is some mind blowingly awesome kit that is a bet more don't hesitate to show me.

Thanks in advanced for suggestions!

~Christian
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Old 09-24-2009, 05:19 PM
Motorized Bicycle Elite Member
 
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Location: ny,ny
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Default Re: Hi there, looking to buy first motor bike kit.

Quote:
Originally Posted by ctriana921 View Post
I recently got a new job that is very nice and only a couple miles away from my home so instead of driving a car I thought I'd look into a motorized bike. I like the idea of a 4 stroke and not having to mix oil and gas and just being able to pull up to a gas station.

My budget range is about 200-350$ for a 4 stroke kit, but if there is some mind blowingly awesome kit that is a bet more don't hesitate to show me.

Thanks in advanced for suggestions!

~Christian
AFAIK there is no reliable 4 stroke kit in that price range. The Dax Titan is the only kit that is reliable and costs a bit more. It's rear mount.

You can get a couple 2 stroke kits for that price and, unlike low cost 4 strokes, they will go many thousands of miles. But you must endure the horror of oil in gas.
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Old 09-24-2009, 06:15 PM
Motorized Bicycle Newbie
 
Join Date: Sep 2009
Location: vermont
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Default Re: Hi there, looking to buy first motor bike kit.

Im really interested in either to be honest, mixing oil isn't so bad, you're right. So any links to reliable two or four stroke motor websites would be nice.
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Old 09-24-2009, 06:39 PM
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Join Date: Dec 2007
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Default Re: Hi there, looking to buy first motor bike kit.

Hello, the EZ Motorbike kit is reliable, but also not in the low-priced range, it turns out that when you use American parts, and Labor in the drive system, it does cost more than all-Chinese kits.


Mike
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Old 09-25-2009, 06:11 AM
Motorized Bicycle Elite Member
 
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Default Re: Hi there, looking to buy first motor bike kit.

Quote:
Originally Posted by ctriana921 View Post
Im really interested in either to be honest, mixing oil isn't so bad, you're right. So any links to reliable two or four stroke motor websites would be nice.

Dax would be best one-stop shopping because he has both and top notch cutomer service. Zoom is a bit cheaper for 2s and excellent service too. Links to both on this page. Boy-go-fast (Rick Shi) is cheapest of all but not as great on support. I've had good results with all of them.

Popular mythology holds 4 strokes as more reliable than 2 strokes which may be true of engines alone but the opposite seems to me the case for bike kits. I never hear of 4 stroke users with 5-10k miles but it's very common with the two strokes. I got 14k on one of my BGF bikes.
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Old 09-25-2009, 06:50 PM
Motorized Bicycle Newbie
 
Join Date: Sep 2009
Location: Austin, TX
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Default Re: Hi there, looking to buy first motor bike kit.

I too am new and would like the 4 stroke engine. I have been confused about the gearboxes and how reliable they are. Price is secondary if you end up saving on a box that breakes often rather than working for many miles.
What are the general thoughts on them?
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Old 09-25-2009, 08:10 PM
Motorized Bicycle Elite Member
 
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Location: Ogden, Utah
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Default Re: Hi there, looking to buy first motor bike kit.

DAX is good and gives a one year warranty on his Titan kit. He'll stand up to his warranty, if anything goes wrong he'll replace the defective part, he won't try to weasel out of the warranty.

Staton makes a nice kit but it's considerably more expensive than the Titan.
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Old 09-26-2009, 11:42 AM
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Join Date: May 2008
Location: Fountain Hills, Arizona
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Default Re: Hi there, looking to buy first motor bike kit.

give a little time on the mileage...I'm working on it, and fully expect to do 10k +
the EZM just came on the market (late april/early may), rome was not built in a day
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Old 09-26-2009, 12:29 PM
Motorized Bicycle Elite Member
 
Join Date: Jul 2009
Location: Ogden, Utah
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Default Re: Hi there, looking to buy first motor bike kit.

I don't buy that 2-strokes lasting longer. 4-strokes are far superior engines. There are many more times as many 2-strokes as there are 4-strokes due to price. With that many more engines out there there's a lot higher chance of people getting lucky and getting high miles out of their engines.

On the other side of the coin I don't see hardly any people complain about early engine failure on 4-strokes, I see it on 2-strokes all the time.
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Old 09-26-2009, 08:41 PM
Motorized Bicycle Newbie
 
Join Date: Sep 2009
Location: Austin, TX
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Default Re: Hi there, looking to buy first motor bike kit.

Remember that a two stroke is under compression and firing every time it arrives at top dead center (well a bit before) and a 4 stroke is not under compression for one stroke. With that in mind the 2 stroke engine has a very reliable life. (Usually 2/3s that of a 4 stroke if the piston, ring and cylinder are equal.) While I was hunting some sites the other day I did come across an expansion chamber for the small 2 strokes and THAT will lower the life of a 2 stroke fast. (The performance increase is usually worth it.) I used to race a Go Kart with a CR80 Honda engine. It used 3 or 4 pistons, rings wrist pins and bearings each season to be competitive. (More if I tuned it poorly!) That is part of the weight savings and increased horse power of a 2 stroke. Just a fact of life. I am looking for a 4 stroke and solid transmission from the durability viewpoint.

I have been having trouble finding any technical data or drawings on some of the US made gearboxes. I think I saw an article on one with a belt primary but I can’t find it again. Does anyone have a link to that ?

Thanks in advance!
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