Problem with bike any ideas?

[uk13iker]

Had my carbs balanced Wednesday picked the bike up it run fine went home and locked it up got it out this morning took a few goes to start but fired up didn't sound right so I took my helmet off as I've got a bit of a head cold so thought it may be that took choke of bike kept running ok went out on it rides ok slightly under powered and sounds like a 125 any help or advice would be great thanks

[Wicky]

Did the mechanic do anything else to the bike? Did he afterwards put the tank and hoses back on right? You could check that the front vacuum take off is back as it was, and the vacuum hose is back correctly on the fuel tap in the right position.

[uk13iker]

Changed my front sprocket too when I picked the bike up after he had done the work it run the best it's ever been and then today struggled to start an then once started didn't sound like my bike usually really loud with akrapovic cans sounded like some one had put silencers on instead of my usual cans

[lloydie]

Check he put the plug back in the vac take off

[Watty]

Sounds like she's on one cylinder to me!

[Miztaziggy]

Sounds like it's swallowed the punctuation.

Here you go . , ?



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[uk13iker]

I was thinking could possibly be running on one cylinder, but wasn't sure whether it would run so smooth on one. Thanks for your punctuation concerns but I didn't realise we had the grammar police policing this forum.

[agentpineapple]

dam those keyboard Nazi's.........
you'd know if the bike was running on one cylinder, was it raining when you rode the bike back from the garage, if so, maybe the front plug drain hole is blocked, causing water build up around the front plug, easy to check.
good luck finding the problem mate.....

[uk13iker]

Was dry when I rode home. Not got iridium plugs in as when I serviced the bike they only had standard plugs, Gent in shop told me they would be fine but wouldn't last as long. ive now got some iridium plugs to put in tomorrow could that be the problem with new fuel mixture from carb balance only did about 8 miles from garage to home thanks for replys so far.

[VTRDark]

I didn't realise we had the grammar police policing this forum.

There is a reason for grammar in the English language. It makes it easier to follow and read which helps with members being able to help.

so thought it may be that took choke of bike kept running ok

This makes no sense.

My guess is it's vacuum related. It also makes no sense that it was fine riding back, parked up and then not fine. Unless you have run out of fuel There must have been some clues when riding back.

(:-})

[Miztaziggy]

I didn't realise we had the grammar police policing this forum.

There is a reason for grammar in the English language. It makes it easier to follow and read which helps with members being able to help..

(:-})

I cudnt of sed it beta misen




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[uk13iker]

No indications to any problem when I was riding home. BIke was running the best it had since I've had it from April this year, that's why am puzzled why it was running great then this morning not so great it rides ok still quick but doesn't sound like my bike

[Wicky]

So all that's changed is that it 'sounds' different 'like a 125' ? Can you expand on that a bit as 125s can be quiet, noisy, rattly or sound like a 2-stroke... Has the mechanic mistakenly given you a slightly similar but smaller capacity bike back... ;-)



Best check with whoever balanced the carbs and find out what they say they tinkered with.

[VTRDark]

OK as you took the bike to, I presume, a garage, you can either take it back to them or try to resolve the problem yourself.

In case you don't know a carb balance requires a vacuum take off from each cylinder. As standard there is one vacuum from the rear cylinder that goes to the fuel petcock diaphragm (fuel tap). A common mistake is to put this on the wrong spigot on the petcock. The bottom which is wrong. It goes to the side right behind the bigger fuel hose. See the following link http://www.vtr1000.org/phpBB3/viewtopic ... se#p282579

Check that first as this may have been disconnected to attach a carb sync gauge. You only have to remove the front two 8mm tank mount bolts and lift the tank to take a look.

The front cylinder is capped off with a bolt. This has to be removed to attach a carb sync gauge. Make sure that the bolt, if it was removed, has been tightened back up securely. You never know it may have worked loose and fallen out. See the following pic:


Ignore the nitrile hose, more on that in a minute. I don't know if you can see where on the bike that is, but if you look through the frame, just above the rad on the right hand side of the bike, you will see it next to the rubber carb boot.

Now....... that's a standard untouched bike. To make it far easier to do a carb sync/balance a lot of people attach nitrile hoses in place ready for a carb sync gauge to be attached. The front bolt capping the front cylinder vacuum is replaced with a conveniently run hose and capped off at the end. Then the already there rear cylinder vaccum (petcock) is cut and a T piece/junction put in place. This then also has a conveniently run hose and capped off at the end. The two capped off hoses are there in place ready for the next time a carb sync/balance is required. Saves a lot of grief messing around with the front bolt and/or disconnecting the petcock vacuum to attach gauges.

See the following:
http://www.vtr1000.org/phpBB3/viewtopic ... 31&t=18430

Yours could be either, so check is all over and make sure there are no vaccum leaks before proceeding with other avenues.

In the following pic you can see the two vacuum hoses. One on each cylinder by the carb inlet boots.


And my two vacuum take off's conveniently stowed away ready to go.


I see there are more posts since I started writing this post It's staying now it may be handy.

I agree we need more info. At the momnet it's like going to the doctor.....

PATIENT: "doctor I don't feel well"
DOCTOR: "I'm sorry to hear that, what exactly is it that makes you feel unwell"
PATIENT: "I don't really know I just don't feel well"

Mmmm rolling eyes, scraching chin, and laughing.



(:-})

[uk13iker]

Ok slight update phoned the bike shop he said sounds like a plugs gone down so I changed the plugs no different. Just discovered left hand side exhaust is blowing cold air right hand side is warm not the best description but I'm no mechanic thanks for all replys