Can I get advise for a powerful 4-stroke setup?

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mesmith

New Member
Jun 30, 2011
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BeaverRat said:
Ok
Since that's the case, are there any specific bicycles that will for sure fit this engine with the cylinder backwords (for a chain driven setup using the parts listed above)?

Thanks
Click to expand...
I'm curious about this myself, since the engine turns counter clockwise, it should work with the clutch on the left side and turn the sprocket the correct way with the setup you posted. My question to you BeaverRat is why do you need 2 mounts, I am planning to use the same plan as you, and want to make sure? Help anybody :).xx.
 
rustycase

rustycase

Gutter Rider
May 26, 2011
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Left coast
it's not a matter of what bicycle might work, it's a matter of gears...
Wayne's bike is without doubt, awesome.
You should build as he did, if at all possible.
IMO
rc
 
B

BeaverRat

New Member
Jun 27, 2011
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mesmith said:
I'm curious about this myself, since the engine turns counter clockwise, it should work with the clutch on the left side and turn the sprocket the correct way with the setup you posted. My question to you BeaverRat is why do you need 2 mounts, I am planning to use the same plan as you, and want to make sure? Help anybody :).xx.
Click to expand...
One of them is a mount, the other is an adapter plate for the Harbor Freight engine. Both are needed...

Ok, here come some more questions:

How do you mount a throttle onto the engine? (adapt a twist throttle from the standard chinese kits)

Is there anyway to remove the governor without taking apart the engine?

How should I do the exhaust with this thing? Should I use the stock exhaust?

Muchos Gracias
 
wayne z

wayne z

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Dec 5, 2010
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DSC_1659.JPG
Here ya go. I removed the stock throttle assembly and added a spring pulling the bellcrank towards the pto side of the engine. My finger is on the spring in the pic. I safteywired the end of the throttle cable thru one of the holes in the bellcrank next to the throttle rod. Then I wire clamped the housing to the bike frame as depicted.

You don't need the adaptor plate. I used the stock BGF mount with two traverse mounted 1/4 x 1 steel bars as adaptors. I bolted the bars to the engine, and bolted the plate to the bars with spacers to clear the engine bolts I tapped the bars for 1/4 threads for the plate/bars connection.

I built my own exhaust by sawing off and reforming the stock manifold with an aceyrelene torch and added 1/2" EMT tubing tailpipe. You can buy redi made kart exhaust or the parts to fab yer own from kart vendors.

After changing the stock exhaust and air cleaner, It was running sorta lean.
I removed my main jet and drilled ot out from.024" to .028" Runs pretty good now!!
TwoSpeedBike.AVI - YouTube
 
Last edited:
M

mesmith

New Member
Jun 30, 2011
47
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United States
wayne z said:
View attachment 41869
Here ya go. I removed the stock throttle assembly and added a spring pulling the bellcrank towards the pto side of the engine. My finger is on the spring in the pic. I safteywired the end of the throttle cable thru one of the holes in the bellcrank next to the throttle rod. Then I wire clamped the housing to the bike frame as depicted.

You don't need the adaptor plate. I used the stock BGF mount with two traverse mounted 1/4 x 1 steel bars as adaptors. I bolted the bars to the engine, and bolted the plate to the bars with spacers to clear the engine bolts I tapped the bars for 1/4 threads for the plate/bars connection.

I built my own exhaust by sawing off and reforming the stock manifold with an aceyrelene torch and added 1/2" EMT tubing tailpipe. You can buy redi made kart exhaust or the parts to fab yer own from kart vendors.

After changing the stock exhaust and air cleaner, It was running sorta lean.
I removed my main jet and drilled ot out from.024" to .028" Runs pretty good now!!
TwoSpeedBike.AVI - YouTube
Click to expand...
Hey Wayne, love your bike, very nice :)
 
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