china performance

hey guys, i have just recently bought a engine kit for my bike on ebay just for me to start on, it is aparntly 80cc and 5-6hp. im deciding wether to go for a modified cheap engine or spend the extra money for a highend engine.. how much power are these china internals capable of handling, i have found a fair amount of performance parts. i just want to find out whats the best way to make a powerful engine for my setup.

thanks, cody
Like the other guys said you bought a 66 cc motor that makes about 2 HP.

The highest HP race motors are made by Arrow Motorized Cycles at 9.5 HP
Dave won't sell you one to ride on the street and they are $899 shipped.

Yes, I may be accused of being a little biased :) but Arrow's Street Racer is
hard to beat for all the aftermarket quality performance parts you get with it
for $499

http://arrowmotorizedcycles.com/motorized-bicycle-engines.html


407812_490636060989155_202920546_n.jpg
 
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HT motor

Like the other guys said you bought a 66 cc motor that makes about 2 HP.

The highest HP race motors are made by Arrow Motorized Cycles at 9.5 HP
Dave won't sell you one to ride on the street and they are $899 shipped.

Yes, I may be accused of being a little biased :) but Arrow's Street Racer is
hard to beat for all the aftermarket quality performance parts you get with it.

http://arrowmotorizedcycles.com/motorized-bicycle-engines.html


View attachment 48048
The picture is of the 4.5 hp street motor . It's 500.00 dollars.
 
The picture is of the 4.5 hp street motor . It's 500.00 dollars.
Sorry about the confusing post.
$500 shipped in the US and a hellava good deal for what you get like I said

Seriously how many people are going to buy the $899 9.5 HP race motor on the same page?
It really wouldn't be a good street bike.

The OP asked how much power they are capable of making.
 
You are overlooking something very critical. These rides have one gear. A modified engine (Arrow, Morini) is usually peaky and runs so-so or like a dog at mid range rpm. On my site you can learn how to modify a chinese engine to have a broad powerband which is exactly what you need with a one gear ride.
 
I am aware the details are always not correct, and i know a 80cc is normaly a 66cc. I know its probaly a waste of money buying a china but i just wanted to start off an get into the sport. I have a knowlage of 2 stroke and 4 stroke engine tuning and building i just wanted to know if these chinas can handle the parts and the right tuning. If i was going to upgrade first would be airfilter, maybe a exhaust and a carb upgrade, i'm trying to learn how to port and tune these smaller engines (used to 125-250cc) going to learn as much as i can first so i can run it in right, tune it right and do the right modifications to it.

Cheers cody
 
Electrical Testing

Defective magneto..testing All readings are approximate. Use Low Ohm-Meter Scale 200K Ohms Check Ohms between BLACK wire and WHITE wire. 2 Ohms Check ohms between BLUE wire and WHITE wire. 300-400 ohms.5. Defective CDI..testing All readings are approximate. Use Ohm Meter High Scale About 200K Positive lead on BLUE wire and Negative lead on BLACK wire infinite (no activity) Positive lead on BLACK wire and Negative lead on BLUE wire. 130-150 K ohms Positive lead on Spark Plug wire and negative lead on BLUE wire. 135-155K ohms Switch to Low Scale 20K Measure between Spark Plug wire and BLACK lead. 2.5 - 2.7 K ohms Magneto and CDI testing .. credit goes to 2Door Link: How to use a multimeter Link: Don Grube’s Great Magneto Mystery:6.Replace Spark plug (I like NGK’s plugs) and high voltage lead from the CDI. Use a wire core lead.

2Door gets credit for this,
Big Red.

https://docs.google.com/document/d/1aBeJuoS--VQWwXysc07rpscTUbPzgc93xjiQBgsyFjc/edit?pli=1
 
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Defective magneto..testing All readings are approximate. Use Low Ohm-Meter Scale 200K Ohms Check Ohms between BLACK wire and WHITE wire. 2 Ohms Check ohms between BLUE wire and WHITE wire. 300-400 ohms.5. Defective CDI..testing All readings are approximate. Use Ohm Meter High Scale About 200K Positive lead on BLUE wire and Negative lead on BLACK wire infinite (no activity) Positive lead on BLACK wire and Negative lead on BLUE wire. 130-150 K ohms Positive lead on Spark Plug wire and negative lead on BLUE wire. 135-155K ohms Switch to Low Scale 20K Measure between Spark Plug wire and BLACK lead. 2.5 - 2.7 K ohms Magneto and CDI testing .. credit goes to 2Door Link: How to use a multimeter Link: Don Grube’s Great Magneto Mystery:6.Replace Spark plug (I like NGK’s plugs) and high voltage lead from the CDI. Use a wire core lead.

2Door gets credit for this,
Big Red.

https://docs.google.com/document/d/1aBeJuoS--VQWwXysc07rpscTUbPzgc93xjiQBgsyFjc/edit?pli=1

Thanks - your're the Man!

Chris
AKA: BigBlue
 
You are overlooking something very critical. These rides have one gear. A modified engine (Arrow, Morini) is usually peaky and runs so-so or like a dog at mid range rpm. On my site you can learn how to modify a chinese engine to have a broad powerband which is exactly what you need with a one gear ride.
The Arrow 4.5 HP Street Racer has a very broad power band because of the reed valve.
Not peaky in the slightest and is very strong down low and in the mid range rpm.

jaguar
Looks like your race motor with the Rock Solid reed valve may not make the April 13th race.
 
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