I use the color-tune to synch/adjust the burn on my big Yamaha roadbike.
It's an inline 4 with 4 seperate carbs, so adjusting the mixture is
important or one cylinder slacks off while another does more work. The
color-tune is bloody brilliant, because you can see just how the engine is
behaving at particular rpm levels etc. After I color-tuned my bike, I got
another 5mpg because I adjusted the carbs to run perfectly at 4000rpm where
the bike is usually running at on the hiway. LOVE my color-tune.
Courtney

========I'm thankful to all those who said "no". Because of them I did it
myself.========
-----Original Message-----
From: Dennis Haynes
Sent: Sunday, October 14, 2012 7:12 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: inexpensive borescope

These little cameras work surprisingly well. The problem is getting them
situated to view the valves. For tuning and finding miss-fires the colortune
see through spark plug
http://www.international-auto.com/index.cfm/fa/p/pid/3448/sc/35750  works
really well. It is a bit pricey but actually viewing the flame is really
cool!

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Edward Maglott
Sent: Sunday, October 14, 2012 8:58 AM
To: vanagon@GERRY.VANAGON.COM
Subject: inexpensive borescope

Just ordered one of these from my friends at Banggood.  I've placed 3
previous orders from them and they all arrived safely after 3 or 4 weeks.
Nothing over $10 though.  I have my doubts how well it would go if there was
a problem with a purchase.  Anyway, I've been wanting one of those
inspection cameras and thinking of ways I could make my own cheaper/better
version.  I recently got a windows netbook, so this will hopefully combine
with it to provide a handy tool for exploring the heater box or other hidden
corners of the vanagon.  This is advertised as being 10mm in diameter so
should also fit through spark plug holes.  I'll report when I get it.

Edward

http://www.banggood.com/Wholesale-2m-6_5ft-Usb-Borescope-Endoscope-Waterproo
f-Inspection-Snake-Tube-Video-Camera-p-44347.html