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PostPosted: July 6th, 2017, 1:31 am 
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Joined: July 6th, 2017, 1:18 am
Posts: 3
Location: Istanbul, Turkiye
Hi everyone,

I’m writing this post regarding to an issue on my 00 Alp (xl650v) that we haven’t been able to fix over a year…

after riding around 20km’s, the bike starts to hessitate, choke, stutter and lag (late response to throttle) on highspeeds (between 110 – 150kph) around 5500 revs. I get this problem mostly when I ride against strong wind or while riding with a passenger. usually when I need the engine power most, it stutters and chokes.
Not sure if it means anything but i get this problem when the bike is hot

At low speeds (lower than 90kph), or inside busy city traffic the bike runs perfectly.

We changed the following parts and still no good:

Carburator (first we changed needles, springs and some other parts inside the carburator, after we could’nt get a good result, we renewed the carb completely)

Sparks
Spark plugs
Ignition coils
Crankshaft sensor
Airfilter
Airfilterbox
Fuel tap (removed, changed, replaced with electrical fuel pump… all the same result)

We also checked air ventilation of the fuel tank, there seems to be no problems.
Syncronization and valve adjustments are good, we checked everything we could think of.

Now we are thinking of replacing the CDI unit and if it doesnt fix the problem, we will dismantle the engine and check engine parts starting with valves.

So… if anyone think of any solution that would be great… I'm about to lose my mind over this....


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PostPosted: July 10th, 2017, 3:48 am 
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Joined: July 8th, 2011, 7:02 am
Posts: 1064
Location: Mackay, Queensland, Australia
I had a similar problem with my '03 XL650V Transalp on 2 separate occasions. One involved the valve clearances closing up in noticeably less than 12,000km, the other involved carbies becoming clogged with crap and requiring a clean out. My bike has now done over 155,000km and had mre than 110,000km before either of these faults.

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Born to be MILD
2003 Honda XL650V Transalp; 1977 Kawasaki Z750B twin;
2006 Hyosung GT250R; 2001 Yamaha FZS1000.


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PostPosted: July 10th, 2017, 3:50 am 
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Joined: July 8th, 2011, 7:02 am
Posts: 1064
Location: Mackay, Queensland, Australia
BTW add your country, at least, to your sig file so that we have some idea of which model variant this is.

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Born to be MILD
2003 Honda XL650V Transalp; 1977 Kawasaki Z750B twin;
2006 Hyosung GT250R; 2001 Yamaha FZS1000.


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PostPosted: July 10th, 2017, 7:47 am 
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Joined: July 6th, 2017, 1:18 am
Posts: 3
Location: Istanbul, Turkiye
Hi Jack,

Thanks for your reply.

The bike is italian made.

we will dismantle the engine this week and check the valves.


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PostPosted: July 10th, 2017, 2:13 pm 
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Joined: February 4th, 2006, 6:26 pm
Posts: 1340
Location: Champaign, IL USA
Before you start tearing down the engine, check for vacuum leaks. Replace all vacuum lines, spray some WD40 around the carb to intakes while running, if idle increases it could be a cracked boot...or simply a boot not secured properly.

Good luck!

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Garry Bird, YMRacing, Owner/Mgr.
AHRMA, CCS #72
'89 TA, 06 Ducati Sport 1000 Bella Boomer the race bike, '76 XS650 Farrah the race bike, '76 RD400 Evil Spawn the race bike, '97 Buell T-Bolt S2, ('97 Dyna-Conv RIP 8 June 2017, the bike my son was riding), '06 KLR 650 off road hooligan, and a '79 GS1000E (sold 25 March 2017 after 30 years of ownership), but ride the TA the most miles!


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PostPosted: July 11th, 2017, 3:43 am 
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Joined: June 12th, 2016, 2:38 am
Posts: 116
Location: Tauranga, NZ
Valve clearances,vacuum leaks, How's the fuel tank cap in 650s? In 600VR (1995) the keyhole is the tank ventilation and has to be the right way down.

Hope you get it sorted!

Neppi

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I'm from Finland, live in NZ and ride Transalp XL600VR 1995


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PostPosted: July 11th, 2017, 5:10 pm 
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Joined: February 20th, 2008, 3:08 pm
Posts: 492
Location: Australia
How is the filter above the tap, I know on my early alp it was distorted and restricted fuel flow. My solution was to remove that filter and put an automobile type filter in the fuel line. Much simpler to fix if you have dirty fuel. I also removed the tiny filters above the carby needle valves.

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And on the eighth day God created Transalp.
And when he saw what he had done, he said
"Crikey I'm getting good at this"


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PostPosted: July 12th, 2017, 12:47 am 
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Joined: July 6th, 2017, 1:18 am
Posts: 3
Location: Istanbul, Turkiye
so we dismantled the engine and exhaust valves inside the front cylinder were in pretty bad condition.

No idea why front cylinder valves were bad but not the valves insisde the rear cylinder :yhquestion:

hopefully we will install everything back with in few days.

i will post the results once i do the test run.


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PostPosted: July 12th, 2017, 12:57 am 
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Joined: June 12th, 2016, 2:38 am
Posts: 116
Location: Tauranga, NZ
Carb sync and -adjustment.

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I'm from Finland, live in NZ and ride Transalp XL600VR 1995


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PostPosted: July 12th, 2017, 10:14 pm 
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Joined: July 8th, 2011, 7:02 am
Posts: 1064
Location: Mackay, Queensland, Australia
What ymracing and neppi said.

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Born to be MILD
2003 Honda XL650V Transalp; 1977 Kawasaki Z750B twin;
2006 Hyosung GT250R; 2001 Yamaha FZS1000.


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PostPosted: July 13th, 2017, 2:21 pm 
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Joined: June 12th, 2016, 2:38 am
Posts: 116
Location: Tauranga, NZ
Might be also that the choke is stuck a bit on on the front cylinder carb.

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I'm from Finland, live in NZ and ride Transalp XL600VR 1995


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