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Spooky Ride

K

kerf

Guest
I went for a short test ride yesterday, thought I would see just what kind of top end this thing would do. I've just broken the engine in and haven't pushed too hard until now. I brought the bike to 40 mph with no effort and firewalled the throttle, it was frightening how quickly it hit 45 and kept accelerating when I dropped off the throttle. I believe the engine would keep accelerating until it broke. I guess thats as fast as it will ever go since I find 30 to be very adequate. Asphalt and my hide just don't mix.
 

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srdavo

Well-Known Member
Joined
Nov 4, 2006
Messages
3,158
that's awesome....to have that much power to spare. Is that a Staton gearbox?
 
K

kerf

Guest
Yes, 18.75/1 reduction with a 14 tooth on the gear box and a 16 tooth on the sprocket. The R460 is running a Walbro chain saw carburetor (factory) and is all the power I want. I'm just glad no idiot pulled in front of me during the test or we would not be having this discussion!
 

srdavo

Well-Known Member
Joined
Nov 4, 2006
Messages
3,158
tell us more about the R460....brand name....where to buy....how many cc's?

was this a Staton kit engine? or did you buy it separately?

sorry for all the questions...inquiring minds...haha
 
K

kerf

Guest
The engine is a Chung Yang 46cc, 4.2 HP @ 11K, 2.35 Ft. Lbs. @ 8K. It is a GoPed engine (Zenoah clone) I bought from Dave's Discount Motors. David Staton has bought some engines for testing but does not offer them at this time. They, like the Tanaka 47R Staton sells, are loud and need additional silencing if noise is an issue for anyone. That being said, I'm happy.
 
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5-7HEAVEN

Guest
:cool: kerf, you are experimenting outside the box with DAVESMOTORS engines, and I commend you. There is beaucoup hp available, and the STATON gear chain box is the perfect match.

Your gearing is presently set up for an 11,000rpm engine at 41mph. At 45mph, you were probably twisting to 12,100rpm.:eek:

If you'd feel comfortable at 30mph, you could change from 14t to 11t outside the box. Then at 12,000rpm, the fastest you'll go is 35mph. At 30mph, engine turns at 10,300rpm.

If your engine's peak torque range is at 8,000rpm, that'd be about 23mph. Right now, peak torque is at 30mph.

And to think, that 11t sprocket is gonna cost you less than $15.:eek:

Myron
 
E

Egor

Guest
Just think that engine is stock. The Zenoa is a high RPM Engine. If you know anything about two strokes, they start running on pulses after a cert-en RPM. On a test years ago on a rotary valve engine at high rev's the valve stopped in the open position and it just kept going and going, no fade in HP.
 

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beast775

Guest
hey kerf

is there anyway i could see your gear box chain tensioner ?its quite scary goin over 40 on a bicycle eh!:eek:
 
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