<<<What is the RPM range for 66cc G5????>>>

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recon chris

New Member
Apr 28, 2011
87
1
0
pacific grove
What is the RPM range for the Shyhawk 66cc engine. Im trying to make a tuned pipe for more low end power but i need to know what this engine puts out is it 5000 at top rpm or 9000 i have no idea please if you know or if you have found a thread that has the answer in it let me know. A formula would also be nice to use i have a 39tooth sprocket on a 26in. wheel maybe one of you know how to work backwards form there.
 

Ruby478

Member
Apr 2, 2011
218
7
18
Dallas,Tx
mines rated at 5500 rpm so im assuming all of them are the same, im 260 lbs and my max speed is 34mph with a 44 tooth sprocket , all stock parts no mods
 

Andyinchville1

Manufacturer/Dealer
Dec 26, 2007
502
1
18
Scottsville, VA
HI,

I have a Tiny Tach on my bike and have had the Dax 66 CC to 6400 RPM (only BRIEFLY since I didn't like the rattly noises coming from the engine).

I have seen factory literature and cannot remember for sure BUT I think they rate max power of the engine at 6000 RPM (I'll try looking for the literature when I get a chance).

Hope this helps.

Andrew
 

StevenMain

New Member
Jul 18, 2016
108
4
0
Texas
Recently I've gotten 9,733 rpm at 41 mph, 44 tooth gear 10t front on a 26" beach cruiser. It stops revving there like it's hit a brick wall. No vibrations after I converted to reed valve and cut a giant opening on the intake side of the piston skirt. I've done every conceivable mod porting wise. Run a milled stock head, stuffed case and keihin 20mm carb with a very large expansion chamber.