Hot Rodding a WC1.

Local time
2:24 PM
Joined
Apr 28, 2009
Messages
41
Location
The State of Jefferson.
Been a while since I've posted, I finally have some time to give my WC1 the attention it deserves. I would like to upgrade to the NE5 cylinder and while I do that I wanted to add some more hi performance parts to it. I currently have around 750 miles on the stock WC1 block, cylinder and head, and most of those miles were in the So. California climate and traffic with intake restrictor and exhaust baffle removed, I'm surprised it's still running!

Question is, what can I do and what parts are still available?

Is just simply switching to the NE5 cylinder and head going to give me any power increase over the stock WC1 cylinder and head?
 
It isn't difficult to make the WC-1 and NE motors zip past 50 MPH. Both versions of the motor need upgrades to make them continue to cruise at higher speeds.

The WC-1 motors have less problems than the later motors, however the valve system issue has been problematic.

Many thought the major problem was caused by excess heat, when in fact the motor runs at peak between 300 and 400 degrees. The problem is in fact caused by heat, but due to design error. The aluminum used expands faster than the seats and more so at higher temps. Once the seats loosen the valves act like "jack hammers" and beat the seat into the aluminum.

Therefore reducing the operating temperature below normal will extend the life of the average WC-1 motor.

My favorite method is to secure the seats from side with two set screws and operate the motor at normal temperatures.

We just released a new hi performance head for the later NE motors [must run hi test gas because of compression], and we originally tested the prototypes on a WC-1 motor in our test bike. We managed over 1000 miles mostly at WOT and all worked well.

We also tested the new American made automatic clutch with the same WC-1 motor, and often ran above 6500 RPMs for long periods of time without any motor issues.

BTW there are lots of speed parts available for the new edition motors, including hi lift camshafts [.193"], mushroom lifters, valves, racing pistons, Hi performance heads, hi flow muffler inserts, copper head gaskets, carburetors, etc.

Have fun,
 
300 400 degrees, what's that doing to your motor, or your oil.
Water boils at what about 212, oil at 220 250?
Holding the valve seats isn't going to lower the temps.

Ray
 
I read somewhere here that taiwan joe was selling from defective parts.
Don't buy right.
Look who's selling from defective parts. Read the past.

Ray
 
It isn't difficult to make the WC-1 and NE motors zip past 50 MPH. Both versions of the motor need upgrades to make them continue to cruise at higher speeds.

The WC-1 motors have less problems than the later motors, however the valve system issue has been problematic.

Many thought the major problem was caused by excess heat, when in fact the motor runs at peak between 300 and 400 degrees. The problem is in fact caused by heat, but due to design error. The aluminum used expands faster than the seats and more so at higher temps. Once the seats loosen the valves act like "jack hammers" and beat the seat into the aluminum.

Therefore reducing the operating temperature below normal will extend the life of the average WC-1 motor.

My favorite method is to secure the seats from side with two set screws and operate the motor at normal temperatures.

We just released a new hi performance head for the later NE motors [must run hi test gas because of compression], and we originally tested the prototypes on a WC-1 motor in our test bike. We managed over 1000 miles mostly at WOT and all worked well.

We also tested the new American made automatic clutch with the same WC-1 motor, and often ran above 6500 RPMs for long periods of time without any motor issues.

BTW there are lots of speed parts available for the new edition motors, including hi lift camshafts [.193"], mushroom lifters, valves, racing pistons, Hi performance heads, hi flow muffler inserts, copper head gaskets, carburetors, etc.

Have fun,


Quenton,

As always, thanks for your info.

I was looking at my old WC1 cylinder and was curious how you would secure the seats with two set screws, it just didn't look possible to me. Do you or anyone have pics of it done already. I would like to have it done even though I'm upgrading to the NE5 cylinder.
Also, are there any hi-lift camshafts available for the WC1 block anymore?
 
Back
Top