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Old 02-09-2007, 09:10 AM   #16
Rapid Dog OP
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link?

...so, what IS the history on the bike?
info and pics will reap volumes of sahge advce here...dude.
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Old 02-09-2007, 09:21 AM   #17
wintonio
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pics coming tonight

ok, I will take my work camera home, and take a bunch o piccies for the zen masters here, and then I will both bore and confuse you with my poorly worded questions, where I will inevitably not know the correct terminology, and in the interim I will begin to fight my super duper excessively strong obsessive compulsive desires and wants and fixations and I gotta have it right now type thinking and general mentality. I think I am hardwired to be the kind of guy that instinctively wants to pour gasoline on a fire, both figuratively and literally...

Another thing: I found out yesterday that the parts manager at the ratty and rundown looking BMW dealership near me is an AIRHEAD guy, and I am taking my carb to him, so he can tell me what I need. I will, however, also take Solo Lobo's advice and get new needles and needle jets.

edit: the PO is the father of my friends baby mama. He is a good guy. Clang looked at the bike a while before I bought it, though not for me, and he told me that it looked like a pretty good bike. The PO had it for a few years in CO, and the PO before him lived in Lake Havasu, I believe. I need to find him and contact him, and see what he did. All the PO I bought it from could tell me was that the engine was rebuilt before he got it, that it had a new speedo with 6500 miles on it, and that he thought the speedo was replaced when the engine was rebuilt. I don't think he rode it a whole lot, certainly probably not in the rain (like I do), so I am sure he had no knowledge of the cracked ignition coil. He is the kind of guy that would have told me of anything that was wrong, that he was aware of; I have just had a few crap outs, like a cracked coil, dying battery, broken clutch cable, typical stuff... but I also like to root and remove

wintonio screwed with this post 02-09-2007 at 09:33 AM
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Old 02-09-2007, 09:45 AM   #18
lkchris
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Running on one cylinder at start isn't much to worry about.

It's really just a difference in effectiveness of the aux carbs (chokes) and possibly related to air leaks. Could even be a difference in compression between cylinders.

Since both cylinder spark plugs fire simultaneously, they're both getting the same spark barring a really bad wire. Ignition, nevertheless, is very unlikely a problem related to this symptom.
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Old 02-09-2007, 09:53 AM   #19
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Quote:
Originally Posted by lkchris
Running on one cylinder at start isn't much to worry about.
Thanks for that. Since my choke levers seem to be sticky (don't return by themselves via the spring) I'm going to assume that's the problem.

I'll post once I find out for sure.
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Old 02-09-2007, 10:33 AM   #20
andmoon
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coil
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Old 02-09-2007, 11:11 AM   #21
datchew
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you still haven't checked those plug wires have ya.
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Old 02-09-2007, 11:22 AM   #22
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...not yet, but you could be right....the coil has been replaced with a year old MotoElectrick brown coil...
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Old 02-12-2007, 09:55 AM   #23
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Bluhduh sputter

...o.k., after replacing the diaphrams the bike wanted
to run strong and rev-up at times, but still had some misfiring and doggin' around 4000-4500 rpm.

So, I replaced the aftermarket (used) sparkplug wires with the OEM ones that came on the bike, checked my valve clearances, checked the timing, and set the carbs with the Twinmax.
I also pulled 2 disks out of the SuperTrapp to quiet the exhasut note a bit.
It starts and idles nicely.
Good.

Took it out for another test run and found it really doggin' at 4-5rpm...worse than ever.
Low and behold I found I hadn't replaced the vacuum crossover tubes to the carbs.
HOwever, after securing the crossover it still runs like crap...

Carb kits should come in today...

shitza!
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Old 02-12-2007, 10:37 AM   #24
wintonio
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anybody have any experience removing a stuck (and now stripped) idling mixture (is that the same thing as the air mixture?) screw. The brass just twisted and chipped right off of the screw top The "venturi" between the jet and the main jet almost didn't come out either, but it did, only because it was hex headed... I guess I should get an extractor and do it. Any advice on that? The rest of the carb was not that bad, but these were either really gummed up, or loctited, though I doubt that. Sorry to jack the thread. RDog- I am still thinking on that coil.
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Old 02-12-2007, 03:16 PM   #25
SOLO LOBO
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[quote=Rapid DogI also pulled 2 disks out of the SuperTrapp to quiet the exhasut note a bit.[/quote]


did you ever mention the supercrapp before? Everyone I know has sitched thiers becuase they couldn't get their GS to run for shit.....

Perhaps that is your issue.
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your bike is suitably dirty. Well done.
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Old 02-12-2007, 03:24 PM   #26
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mmm

well I don't know if I mentioned it, but it's on the bike.
that said, it's hard to believe that a pipe wuld make the bike flatten out and shudder like a wet dog at 4000rpm in 4th gear...it's something amiss with either fuel or spark I'm pretty sure.
The bike ran fairly good on the maiden voyage with the Trapp.
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Old 02-12-2007, 03:53 PM   #27
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Quote:
Originally Posted by Rapid Dog
well I don't know if I mentioned it, but it's on the bike.
that said, it's hard to believe that a pipe wuld make the bike flatten out and shudder like a wet dog at 4000rpm in 4th gear...it's something amiss with either fuel or spark I'm pretty sure.
The bike ran fairly good on the maiden voyage with the Trapp.
I sent you a PM.
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Old 02-12-2007, 08:59 PM   #28
Rapid Dog OP
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Thanks RandyB and others

Bing basic kits should be here tomorrow, pulled the carbs tonight, I'll post pics tomorrow, some odd things...

For reference:

Rennsport 336 cam
foam air filter
Supertrapp exhaust
MotoradElectrick brown coil
" " Omega charging system
Smog plumbing removed

other than that stock motor from what I can see.
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Old 02-13-2007, 05:53 AM   #29
SOLO LOBO
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Quote:
Originally Posted by Rapid Dog
Bing basic kits should be here tomorrow, pulled the carbs tonight, I'll post pics tomorrow, some odd things...

For reference:

Rennsport 336 cam
foam air filter
Supertrapp exhaust
MotoradElectrick brown coil
" " Omega charging system
Smog plumbing removed

other than that stock motor from what I can see.

Absoutely toss the foam filter and return to the stock paper... when running that, I think it is fair to assume that the stock jetting would not be correct, and perhaps not close.
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 02-13-2007, 08:04 AM   #30
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so far...

...I'll do whatever it takes, I'm not stuck on the filter, and if it's a jetting problem, I want to get it sorted out too.

Here's a few pics.

First thing I noticed was the screw I pulled out, both carbs had the o-ring all chewed up and sticking out of the screw hole past the screwtop ...

Rapid Dog screwed with this post 12-16-2010 at 06:51 AM
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