Maintenance & Technical > KX500 Original
a working compresion release is here
Motorrad:
Digging the idea... As im one of the many that can not run the chain saw setup (tank interferance).
Few quick thoughts/questions..
Volumetrically how much extra area are we adding to the combustion chamber (how much space is in all of these adaptors, area around the stud, etc) If you add it all up, are we getting into some serious numbers?
Hot exaust gas: Over time, do you think there will be an issue with hot exaust gasses erroding anything? studs, gasket serfaces around the stud.. Its amazing what things like this will do on car motors.. Will ditch things right up.
Sealing.. Just off looks, is thre now 3 serfaces you are sealing with that setup (spacer to head, adaptor to spacer, Compression release to adaptor)... Things like that scare me a bit, being a desert racer, DNF due to a stupid crush washer backing off etc sucks...
In another thread you said "There is a hole drilled into the chamber at an angle. The adapter is designed to capture the hole in a counter bore. " are you capturing it like say a banjo bolt? or are you filling the entire area around the stud with combustion to then travel into the adaptor?
--- Quote from: jfabmotorsports.com on October 30, 2009, 05:34:42 AM ---
--- Quote from: Larry Wiechman on October 29, 2009, 12:15:09 PM ---
--- Quote from: PowerFiend on October 29, 2009, 11:58:07 AM ---Anyone worked out a hotstart activated one yet? :evil:
--- End quote ---
Do you mean cable/lever operated?
Larry
--- End quote ---
I have been working out the details of this idea for some time. I just finished it up this morning and if the rain here ever stops I will take the K5 out and thrash it a bit.
I think it was Dutch-K5 Fan that said he was interested in using this type of valve. The valve can be bought all over the internet and with very little head work and the little adapter that I am going to offer it can be installed on just about any head on any bike.
JFAB
--- End quote ---
jfabmotorsports.com:
Motorrad,
There are only 2 sealing surfaces, valve to adapter and adapter to head. The shinny piece is a machine mark from the lathe work on the adapter. The valve has a spark plug washer between it and the adapter. My proto type uses no washer between the head and adapter. A copper washer could be used.
I did the some math to get a rough idea of the volume created by holes and it is less that 1cc. I will do an actual cc test latter.
The exhaust gas does share the space with the head stud and I am sure over time there will be some oil build up in that area. As far as maintenance goes, I am skeptical that it will be more than is required to keep the KIPS working. The gasses moving past the decompression valve are not hot unless you hold the valve open for a prolong period of time.
I have a little over 20 hours of testing on mine between me and my 13 year old nephews riding the k5.
View the video; I think the plusses outweigh any maintenance issues. Even if you had to clean the carbon from it ever so often.
In the video I point out the Hot Start lever. The bike was warm but not hot. That was the first and only take with the camera. First kick!
http://www.youtube.com/watch?v=vXDVzyiV5oA
Friar-Tuck:
AARGgghh... You're KIllin' me! :-D :-D :-D
Dang JFab That's Great!!
As an aside, I don't personally know anyone who has had problems with their comp release on their chainsaws.
I have an OLD Craftsman (made by Echo) in the 80's and that old girl has had no prob.
Tuck\o/
Motorrad:
Thanks jfab that answered a few questions I thought up really quick. And I'm sure others had as well.
Motorrad:
How do these comp releases work jfab?
Are they lome the chain saw ones that auto kick out when the bike fires?
Or do you have to hold the leaver down to keep it engaged?'
Hard to tell from the video if you continue to hold it down with your other thumb or not...
Reason I ask. is Im looking at these as a option to the "clutch side" hot start leaver.... But if you need to continue to hold it... it would be nice to be able to use the trottle..
http://www.asvinventions.com/RotatorClamp/RCU05.php
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