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Old 09-05-2010, 01:33 AM   #7636
Gian
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Joined: Oct 2008
Location: north east of Italy
Oddometer: 968
as usual, the flying Francesco Catanese

http://www.youtube.com/watch?v=4Io5yynTiiU



Gian screwed with this post 09-05-2010 at 08:59 AM
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Old 09-05-2010, 05:57 AM   #7637
HitTheRoad
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Joined: Dec 2009
Location: Polska
Oddometer: 16
A little trip to Romania. One week, two bikes, 3430km. Roads 7C, 67C, Urdele, a few cities...


shepherd ;)


Urdele


~2300 meters above sea level


7C road

more pic:

http://picasaweb.google.pl/Kuba.czwa...29278715604178
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Old 09-06-2010, 05:28 PM   #7638
Ridesolo
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Joined: Jun 2006
Location: Zambo.Peninsula
Oddometer: 166
Hi all, I've been lurking here for awhile, I thought I'd post a few pics of my bike. She's a model '99 and I've added a sw-motech crashguard, cycra handguards, fatbar, footpegs and signal light since I got her a few months ago.





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Old 09-06-2010, 06:13 PM   #7639
locorider
Loco, pero no estúpido!
 
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Joined: Aug 2006
Location: Puerto Rico, U.S.A.
Oddometer: 2,418
Isn't she lovely?

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1989 Honda XL600V Transalp, slightly modified!

"If you don't follow your dreams, you might as well be a vegetable", Burt Munro, The World's Fastest Indian
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Old 09-06-2010, 08:09 PM   #7640
Jim Rowley
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Location: Black Forest, Colorado
Oddometer: 2,510
Quote:
Originally Posted by locorider
Isn't she lovely?
Which one? All three. The bike's nice too.
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Old 09-06-2010, 09:23 PM   #7641
Squily
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Joined: Sep 2006
Location: Esperance WA
Oddometer: 1,186
One for the tech-fundies

I've been experiencing some tech-probs with the @. When I accelarate at 100% throttle, the bike would go up to 130/140, then loose power, as if fueling issue. I then have to close the throttle completely and do a slow opening for the bike to "go" again. I've replaced the fuel pump- no change.

If I use 75% throttle, the bike would accelarate all the way past 140 to where-ever the load/wind allows. If I then open the throttle to 100%- same issue as before (i.e. loss of power).

I'm stripping this weekend to service the bike- any ideas what to check or what could be wrong?

Was going to check throttle position sensor, carb diaphrams and fuel line.
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Old 09-06-2010, 11:37 PM   #7642
stevh0
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Joined: Sep 2007
Location: Cape Town, ZA
Oddometer: 1,368
Quote:
Originally Posted by Gian
as usual, the flying Francesco Catanese

http://www.youtube.com/watch?v=4Io5yynTiiU


that thing sounds SWEET!
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Old 09-07-2010, 02:57 AM   #7643
locorider
Loco, pero no estúpido!
 
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Joined: Aug 2006
Location: Puerto Rico, U.S.A.
Oddometer: 2,418
The bike, of course!


Quote:
Originally Posted by Jim Rowley
Which one? All three. The bike's nice too.
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1989 Honda XL600V Transalp, slightly modified!

"If you don't follow your dreams, you might as well be a vegetable", Burt Munro, The World's Fastest Indian
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Old 09-07-2010, 03:18 AM   #7644
Kitedans
In love with my AT !!
 
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Joined: Dec 2009
Location: Catalonia - Spain
Oddometer: 39
Quote:
Originally Posted by Squily
I've been experiencing some tech-probs with the @. When I accelarate at 100% throttle, the bike would go up to 130/140, then loose power, as if fueling issue. I then have to close the throttle completely and do a slow opening for the bike to "go" again. I've replaced the fuel pump- no change.

If I use 75% throttle, the bike would accelarate all the way past 140 to where-ever the load/wind allows. If I then open the throttle to 100%- same issue as before (i.e. loss of power).

I'm stripping this weekend to service the bike- any ideas what to check or what could be wrong?

Was going to check throttle position sensor, carb diaphrams and fuel line.
If I had to guess, that wold be the problem !!
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Old 09-07-2010, 05:16 AM   #7645
Squily
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Location: Esperance WA
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Quote:
Originally Posted by Kitedans
If I had to guess, that wold be the problem !!
Orenburg thinks just one of the diaphragms, and it makes sense

I ahve also checked:

fuel- no water or dirt- already checked and the problem have been persisting for too long (after services, tank drains, etc.) Since its a plastic tank, there is also no chance of rust. I don't "leave" fuel in the tank and its not stale fuel. I use reputable service stations and try to only use high octane (since the rebuild, the low octane stuff gives her hiccups). I've just done 2000km this weekend and used three-and-half tanks of fuel so its not stagnanation that's the issue- tank took 43l on Friday morning so it was close to empty. .

exhaust- performance exhaust (or so they say- Airage) and I have had some real issues with it. I actually took the whole thing apart again last week and drilled bigger holes in the baffle pipes. It now works without restrictions and don't "blow" apart anymore

Don't think its jetting-, but not sure how to check. I went up a size or some after the rebuild and I went according to the settings supplied by the Dynojet documentation (mildly tuned engine with performance pipe, performance filters). One thing I did not do, was drill the slide holes. Was thinking of doing that this weekend, but that should really only make the slides open faster, not "prevent" them from opening?


Thanks for the info- even if I rule out things by double checking that I have considered it, its worth it
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Old 09-07-2010, 05:56 AM   #7646
Jim Rowley
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What about replacing the fuel filter? You said you use reputable fuel sources but didn't mention replacing the filter itself. Just a thought.
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Old 09-07-2010, 06:16 AM   #7647
Trackie
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Joined: Nov 2009
Oddometer: 16
Quote:
Originally Posted by Squily
I've been experiencing some tech-probs with the @. When I accelarate at 100% throttle, the bike would go up to 130/140, then loose power, as if fueling issue. I then have to close the throttle completely and do a slow opening for the bike to "go" again. I've replaced the fuel pump- no change.

If I use 75% throttle, the bike would accelarate all the way past 140 to where-ever the load/wind allows. If I then open the throttle to 100%- same issue as before (i.e. loss of power).

I'm stripping this weekend to service the bike- any ideas what to check or what could be wrong?

Was going to check throttle position sensor, carb diaphrams and fuel line.
Sounds familiar, had the same last year, it would only go up to 110 km/h.
A new carb diaphragm solved the issue.
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Old 09-07-2010, 07:18 AM   #7648
Squily
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Joined: Sep 2006
Location: Esperance WA
Oddometer: 1,186
Quote:
Originally Posted by Jim Rowley
What about replacing the fuel filter? You said you use reputable fuel sources but didn't mention replacing the filter itself. Just a thought.
I have a serviceable "stone" fuel filter and I check it every service. I checked it again when I installed the new fuel pump and it was fine
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Old 09-07-2010, 08:15 AM   #7649
Africa_Twin
Africa Twiner
 
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Joined: Oct 2009
Location: Lisbon, Portugal
Oddometer: 363
Quote:
Originally Posted by Squily
I have a serviceable "stone" fuel filter...
Inquiring minds want to know more about this!...

I'm all ears
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Old 09-07-2010, 08:23 AM   #7650
Ladder106
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Joined: Jan 2005
Location: Davis, CA
Oddometer: 4,829
Here are my suspects listed in order or priority.

1.
Main jet is too small. Your descriptions are good and from what you say, the bikes fueling is fine until you hit the main jet....then it runs lean. It accelerates fine so the diaphragms are most likely OK and you said you just drilled even larger holes in your baffles to make your pipe flow even more. Drilling out the carb slide bleed holes is just designed to get the slides up faster. This will likely make your symptoms worse if mains aren't changed.

2.
Small hole or crack in the slide diaphragm. I know, I said this was not likely but it can be the problem if it is positioned just right so that it opens a hole only when the slide comes up to the very top. Not normally where they crack since you don't ride at full throttle that often but it is possible.

3. Water in the float bowl. It is possible to get water in your fuel even if you fill at good service stations (why do we still call them that if no one there can actually service your machine any more and you spend more time waiting in line behind people buying GROCERIES??) If it's just a bit of water it will sit down at the bottom of the carb and only interfere when fuel starts coming up the main jet. Probably not because this symptom usually starts at 2/3 or greater throttle and not just at WFO. In any case, drain the bowls into a clear container of some sort so any water or debris can be visualized....otherwise you'll never know.
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