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bucking and hesitating - help! (Read 17 times)
RockyRoad
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Posts: 10
Columbus, Ohio
Re: bucking and hesitating - help!
Reply #15 - 09/02/05 at 01:57:49
 
Personally, my old Thumper ( 1996 ) always
bucks and twists unless I put in two caps
( 1 cap per gallon I guess ) of Marvel
Mystery Oil .

Even one tank not treated causes the symptoms
you are describing...
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blue-J
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Re: bucking and hesitating - help!
Reply #16 - 09/02/05 at 07:52:58
 

Update:

well, the other day I siphoned out most of my gas and added half a bottle of carb/fuel injection cleaner in preparation for going to fill it with high octance gas.  However, when I started it up, it was fine.  I drove it a short tirp - no bucking.  Went to put in gas - only a half tank, in case that was the problem.  It was fine on the way home.  I have not tried it since, so can't say what's going on.

Maybe it only happens after rain?

By the way, I don't think they have "Marvel Mystery Oil" in Toronto.  What is it?

Blue-J
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DavidV
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Re: bucking and hesitating - help!
Reply #17 - 09/02/05 at 08:14:59
 
If the problem was caused by a sticky diaphragm slide (aka diaphragm assembly)  then a good shot of carb cleaner may have been enough to clear up the problem.
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Savage_Rob
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Posts: 6972
Texas (Dallas area)
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Re: bucking and hesitating - help!
Reply #18 - 09/02/05 at 08:22:11
 
blue-J wrote on 12/31/69 at 16:00:09:
By the way, I don't think they have "Marvel Mystery Oil" in Toronto.  What is it?

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1998|MAC muffler|ceramic coated header|K&N air filter|Amal Mk2 carb|Odyssey battery|iridium plug|NC windshield|Dunlop 491s|Superbrace|EBC brake rotor|12.5" Progressive shocks|Kuryakyn ISO grips
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RockyRoad
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SP1!

Posts: 10
Columbus, Ohio
Re: bucking and hesitating - help!
Reply #19 - 09/02/05 at 08:42:54
 
I felt sure I got a bottle of Marvel
Mystery Oil at walmart ... but cant seem
to find it on the web site ...

Anyway a quick search with google
produced this

http://www.autobarn.net/chmm012.html
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Ed L.
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Sunny Florida
Gender: male
Re: bucking and hesitating - help!
Reply #20 - 09/02/05 at 16:41:16
 
A couple of ounces of two stroke oil per tankfull will do the same as MMO, the idea is to provide a little lubrication to the carb slide so it won't stick. Good to hear that the bucking has cleared up.
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Silver '02, clubman handle bars, Cobra headlight, Sportster muffler, K+N stock air filter, 152.5 main, Superbrace, oil cooler, 1/2 inch aluminium plate forward controls, spark advance, goes like stink
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klx650sm2002
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Posts: 2041
Cumbria,England
Gender: male
Re: bucking and hesitating - help!
Reply #21 - 09/03/05 at 02:52:14
 
Castrol R40 would do the job and smell good too.

Clive W  Cheesy
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