Date: Mon, 17 May 1999 10:32:04 -0400
Subject: Re: Oily plugs
From: Chris L Johnson 

On Sun, 16 May 1999 12:33:23 EDT W236llis "at" aol.com writes:
>I have got a '94 Beta Techno 250 that has got a really annoying habit. 
>It is constantly oiling plugs. I am running it on 64:1 using Silkolene Pro2 
>synthetic oil that can be used in Road racing bikes. Is it possible 
>that the oil is TOO good. The plug is a NGK 7ES. It is a bit smokey but I do 
>not think it is worse than any other trials bike. Some folk have suggested it is 
>my  wimp style of riding....
>Nigel Willis.

Withyour "wimp" style of riding, you are way over oiled, and are running
a cold plug.  You have likely really plugged up your machine, "hardening"
it arteries.  Bad combo.

Do three things.   First, change your Silkolene Pro2 premix to 100:1
(don't worry).  That's more than enough oil (especially with your riding
style) unless you plan to flat track your bike.  Next, use a hotter plug,
like a BP5ES or heat range equivalent.  The "P" in the plug, being an
extended type will help also.  Then make sure your oil filter is clean
and oiled such that all the excess is squeezed out, so you are not
over-constricting air flow.  

Now go out and find a hill and run the snot out of the bike, and burn out
the 6 barrels of oil you have accumulated in the muffler.  Take care not
to melt anything if the muffler starts to burn out REALLY fast.  Just
back off and start again when things cool down a bit.  This effort should
produce huge amounts of smoke and get the pipe really hot, starting from
the header and working its way back.  While smoking, the bike may cough
and run crummy until burnout is complete.

Now you are "clean" and ready to look at jetting.  The bike should run
smooth without blubbering anywhere in the range when you apply a load. 
Four stroking when you back off the throttle is OK.  If you ride in a
style where you use very little throttle, you may have to jet
specifically for that riding style.  Particularly in the pilot jet and
jet needle position and needle jet.  Some folks use a lot of throttle and
"push" the motor hard at low RPMs.  Others "follow" RPM with the
throttle, requiring a leaner configuration down low.  But this same style
may result in lean running at higher RPM, bacause the slide is kept
"anal" low in the carb body, starving the motor for fule and even air. 
IMHO, it is better for the motor to up shift early and push the throttle
hard.

Hope all this mess helps.

Chris Johnson, Director of Engineering
College Park Industries, Inc.
papazit "at" juno.com (home address)
chris "at" college-park.com
www.college-park.com