New Slant Heads for 80cc's: Compression Boost!?

cspaur13 said:
just so you guys know. zoombicycles isnt the only dealer that sells these slant heads,
like
Cylinder Head (Part #2) - $9.99
u might want to ask them if its actually a slant head cause it dosent say but the pic is a slant head
and heres another site. they have 2 for the different grubee styles.
1-2B Gen II Angle Fire Head - $14.00 : USABikeMotors.com, Star-Fire Motors and Parts

im sure theres other sites out there.
Click to expand...

Just got off the phone with those guys they said they only had them for the smaller cc model , doesn't have it for the so called 80 cc..........
 
I've got 2 on the way but I think I will break in the motor's first with the stock heads. What do you guys think?...POPS
 
Ya know,I've always been of the mind that a motor should be broken in the way I want it to run. I do take it a little easy the first few minutes but after that I have never had the patience to keep on taking it easy on a motor. This has worked pretty good for me over the years, of course YMMV.
 
Put on on While the china is new and breaking in is my guise , then leave it alone. I get the impression a lack of dowel pins at the head and cylinder. When it settles where its at ya leave it alone. Our chinas are not that precisely made. Just my 2 cents LOL......
 
You guys all said its better, but where are the number from before and after? I would like to get one of the new heads but for 1 mph it won't be worth the time to change it out.
 
OK I installed it with a new gasket and new BP5HS.

I thought I might blow my original 1+ year old regular front freewheel out starting my bike. The compression felt higher on start pedaling, but not HUGE. The strange thing is the bike seemed to want to start faster, but that's probably just a new plug thing.

So I let it warm a bit and just putted down the road and back. All seemed well. Off for some throttle action.

Wow. Whoa. Brain rush. The engine has more low end and goes to top RPM much faster. I just whip through the gears and was pulling my biggest hill in 5th, before maybe 3rd gear max.

NICE $22 investment!!


But I think I've reached my clutch limit......it slips, or when I tighten it, it grabs "too soon" - ie when pushing the bike with clutch pulled fully in. I need to design some hi po clutch pucks.
 
Awesome news!

Did you use one of your head gaskets?

Also, on a side note, is it the amsoil Saber oil that you recommend or the Interceptor?
 
theycallmebob said:
Awesome news!

Did you use one of your head gaskets?

Also, on a side note, is it the amsoil Saber oil that you recommend or the Interceptor?
Click to expand...

Yes.

I run Amsoil Dominator. Any of the three work fine. I think Dominator with a splash of castor oil makes the most power.
 
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