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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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  #1  
Old 01-23-2012, 03:40 AM
HIEFY HIEFY is offline
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Default more 4 stroke talk....

How big can I actually go with a 4 stroke and still pass it off as a 49cc?? Wana go fast but don't want to bring any attention to my ride. I jus want to at least be in the 40s is that too much to ask?? Haha from what I've heard it may be haha any help or advice??
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Old 01-23-2012, 04:31 AM
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scotto- scotto- is offline
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Talking Re: more 4 stroke talk....

Quote:
Originally Posted by HIEFY View Post
How big can I actually go with a 4 stroke and still pass it off as a 49cc?? Wana go fast but don't want to bring any attention to my ride. I jus want to at least be in the 40s is that too much to ask?? Haha from what I've heard it may be haha any help or advice??
I'd say 49cc......they'll never know the difference. Since you live in pittsburg, ca........that is legal so that's my advice. I run a 50cc 4-stroke and feel like an outlaw

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Old 01-23-2012, 06:50 AM
HIEFY HIEFY is offline
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Default Re: more 4 stroke talk....

But from what I hear the speed won't b there nor will it be able to get up certain hills. Is this true? I ask cuz I've seen some of your builds and I'm for sure a fan. And since your obviously a 4 stroke pro.... Is there any way at all to get that little 49cc to b in the 40mph range??
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Old 01-23-2012, 08:59 AM
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NunyaBidness NunyaBidness is offline
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Default Re: more 4 stroke talk....

Certainly there is. There are shifter kits available and that would probably be the easiest way to get the speeds you're looking for. You've already noticed that scotto- is the master 4-stroke bike builder and can likely give some performance tips for a 50cc motor that will also help.
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Old 01-23-2012, 10:13 AM
HIEFY HIEFY is offline
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Default Re: more 4 stroke talk....

Nice so how much would one of those cost me? Is it hard to put it in? And will getting it up to the speeds I want take away from its climbing ability??
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Old 01-23-2012, 10:17 AM
HIEFY HIEFY is offline
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Default Re: more 4 stroke talk....

Sorry I was also wondering if you guys had any suggestions on the best 49cc to go with to get the best reliability and speed.
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Old 01-23-2012, 11:26 AM
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Default Re: more 4 stroke talk....

a EZM kit is your best bet i would personally not recommend the 4g . yes it costs more but if you want it last and not learn the hard way like me get a ezm .
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Last edited by andrewflores17; 01-23-2012 at 11:26 AM. Reason: i cants spellssss good
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Old 01-23-2012, 04:18 PM
Tinsmith Tinsmith is offline
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Default Re: more 4 stroke talk....

Mr Heify, I'm not sure about getting 40 mph out of the EZM 49cc HS system, but it is a nice set up. I run a 64 tooth sprocket and can manage a long gradual climb but I would have to pedal on most hills. Come to the Central Pa rally in August in Lebanon and you'll get an eyeful of bikes there. Dan
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Old 01-23-2012, 04:37 PM
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The_Aleman The_Aleman is offline
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Default Re: more 4 stroke talk....

Quote:
Originally Posted by HIEFY View Post
But from what I hear the speed won't b there nor will it be able to get up certain hills. Is this true? I ask cuz I've seen some of your builds and I'm for sure a fan. And since your obviously a 4 stroke pro.... Is there any way at all to get that little 49cc to b in the 40mph range??
My brother has a Q-matic and I have a 4G shifter, we both have 49cc 4-strokes. They have "adequate" power, and that's if you pedal a lil bit. 30MPH on straights is not a problem at all. Your gear ratio is going to dictate your hill-climbing and top-speed - to a point. Remember, you're dealing with 2HP.

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Originally Posted by HIEFY View Post
Nice so how much would one of those cost me? Is it hard to put it in? And will getting it up to the speeds I want take away from its climbing ability??
If you want versatility, you need gears. Most systems are single-speed with varying amounts of slippage at low speed.

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Originally Posted by HIEFY View Post
Sorry I was also wondering if you guys had any suggestions on the best 49cc to go with to get the best reliability and speed.
GXH50, hands down. There is no better 49cc. But it's $300 or so and either needs a different carburetor or a $15 Staton throttle kit to work. Some people have made their own throttle linkage. The GXH50 may or may not be more reliable overall than a Huasheng in the long term. But they definitely make a little more power.

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Originally Posted by andrewflores17 View Post
a EZM kit is your best bet i would personally not recommend the 4g . yes it costs more but if you want it last and not learn the hard way like me get a ezm .
I'm sorry your experiences with the 4G wasn't very good. Yeah, it's a wierd system and needs work to be reliable out of the box. I have 4000 miles on mine in shifter configuration and I love it. Also, I will smoke every 49cc with a Q-matic there is off the line. Smoke em in midrange and smoke em up hills, too. My shifter 4G cost about $40 less than a Q-matic but it made up for that with extra parts and labor. In the end, same cost, perhaps. But I will smoke Q-matics with similar engines.

Quote:
Originally Posted by Tinsmith View Post
Mr Heify, I'm not sure about getting 40 mph out of the EZM 49cc HS system, but it is a nice set up. I run a 64 tooth sprocket and can manage a long gradual climb but I would have to pedal on most hills. Come to the Central Pa rally in August in Lebanon and you'll get an eyeful of bikes there. Dan
It can be done in the right conditions. My brother's GXH50 and Q-matic with 56T could hit 40-42, about 8000RPM or so. A GXH50 can take that 8000+ a little better than a Huasheng, perhaps. But yeah, being a single-speed system, the take-off requires pedaling to be brisk. Steep hills need pedaling.

This is motor-assisted bicycling tho. Pedaling is almost mandatory if you're keeping it legal. Embrace it!
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Old 01-23-2012, 05:13 PM
HIEFY HIEFY is offline
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Default Re: more 4 stroke talk....

Nice thank you everyone for your comments suggestions and experience. They are very much appreciated I obviously need a lot of help due to the fact that i literally know nothing about these things but i am very excited about learning. if anyone has any time I'm goin to put a link to the bike im going to be having made for me in my next message. If you scroll down it is I believe the third bike down. It says "matte black with cherry rims" it has a 2 stroke on it but I will be only recieving the bike with no motor so i can put my own motor on it. I jus have a few questions for you all if you guys have some time. What would b the biggest 4 stroke I can put on it without it being overkill n looking like a motorcycle that the cops are for sire gona wana pull over?? Lol also I am goin to put some disc breaks on it and do you guys see any other mods i can do to it to perfect the ride quality and everything? And also on the post the guy said it has like a 46" wheel base? I'm 5'6 and I was under the impression I should b riding a 26"? So am I missing something here?? Haha thanks for everyone's time I appreciate it. Here is the link for the page the bike is on Custom Motored Bicycles - Motored Bicycles For Sale 2010
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