slant head vs regular

D

Dougan

New Member
I'm just curious, I have a 66cc slant head grubee skyhawk on my bike that has a standard finish (and is covered in oil) and I also have an extra engine (66cc, I think it's a PK80 but not sure) that is not a slant head but has the nice black finish to it. I'm considering on swapping the current motor out with the black one but I'm worried about power loss. How noticeable is the difference between slant and non-slant?
 
i'd say a good ngk plug and wire would make a bigger difference. slant head's mostly for clearance
 
Never had a regular head, all have been slant. Oil...ummm is it from the spark plug hole or between the head and cylinder. Between the head and cylinder is a sign of head gasket leak. Remove head and mill it down. If the gasket is good, spray with kopper kote and see if it can be used again.
 
The oil was because I had the wrong muffler and it had too much back pressure which forced oily exhaust out of the gasket. Its fixed now, not a problem. Just like the look of the black finish better, that's all. Anybody else that can wweigh in on slant head vs regular?
 
All 5 of my 2-strokes had the regular non-slant heads on em. Ran fine as far as chinagirls go. If you're worried about any power difference, bolt the slanthead on the older engine.
 
I can weigh in on something else - black painted motors.

A common issue is that they get WAY too hot, I wouldn't ever run one - but also, I do computer work all day long. When there's a colored heatsink, it's because the metal is annodized, not painted - and with good reason.
 
Oil...ummm is it from the spark plug hole or between the head and cylinder. Between the head and cylinder is a sign of head gasket leak.[/QUOTE]

what if it is from the spark plug hole? I have some from there. What does that mean? To rich of fuel/oil mix?
 
There's a couple of nice threads here about how to lap a head on some fine sandpaper to improve it's ability to seal...

And if the sparkplug seal is leaking that much, someone was probably too heavy - handed when tightening the plug. My cystal ball sees a helicoil in the future. :-)
rc
 
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