Scott,
I used a lead additive on my Norton motorcycle. I had the heads off to
clean them and found a lot of build up on the valves. Assuming it was
from something the PO did or didn't do I cleaned them up and ran the bike
for two years, with lead additive. I can't recall which it was. During
the next tear down, to do the rings, the valves were crudded up again. I
cleaned them again. Just for grins, I stripped the head off again a year
or so later. The valves were still clean. I will no longer use any
additives which coat engine parts. The lead product I used left nasty
deposits on the valve heads.
I have since learned that most people just run what you got and if they
pocket install the hardened stuff. I put another 10,000 miles on the
Norton with no appreciable pocketing of the valves. Unlike my TR3, I
ran the bike hard, a lot of full throttle and to the red line on a
regular basis. I was younger then and had to make sure the rice burner
crotch rockets respected British Iron. For what I have read, keep the
revs reasonable and a little top cylinder lube like Marvel mystery oil in
the gas periodically, will keep the valves in good shape.
Jack Brooks
Hillsdale, New Jersey
1960 TR3-A TS69032L
'74 Norton Commando Roadster
On Wed, 13 Nov 1996 21:19:23 -0800 scott suhring
<suhring@lancnews.infi.net> writes:
>emanteno@ix.netcom.com wrote:
>>
>> On 11/12/96 14:34:15 you wrote:
>>
>> >At a recent local Pantera club monthly meeting, we had a fellow
>from a
>> >gasoline research organization. He spoke of Marvel Mystery Oil,
>> >saying it was developed during WWII for aircraft gas applications
>> >(sorry, I've forgotten why). However, he did add that the new gas
>> >that is now sold in California has also the deletarious affect (in
>> >addition to rotting older rubber gas lines) of exacerbating rust
>> >in fuel tanks, and that several oz's of MMO every few tankfuls
>helps
>> >prevent this rot.
>>
>> Shane's note about fuel system rot reminded me to post this for
>those who may have replaced
>> stock mechanical fuel pumps with electric ones. I did this in my TR6
>over 15 years ago. I used
>> the interrupter/diaphragm style fuel pump. My first pump lasted over
>10 years, my second lasted
>> over 5, the last one was dead in just over a year. We (myself and my
>local parts house)
>> determined by reading the information that comes with a new pump
>that this style of pump is not
>> compatible with the EPA mandated oxygenated fuels, the fuel attacks
>the innards of the pump. If
>> you have or want to go to an electric fuel pump, be sure to buy one
>that is intended (and says
>> so) for all types of fuel.
>>
>> Irv
>> 74 TR6 CF22767U
>> Highland Park, IL
>
>
>Speaking of such matters, what is the thought of using a lead
>additive?
>Your experiences with performance and engine maintenance would be
>helpful.
>
>Scott Suhring
>Elizabethtown, PA
>'70 TR6
>
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