undercover
All Weather Rider, well hard
Posts: 186
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Post by undercover on Jun 30, 2014 12:46:29 GMT 1
Tried to balance the carbs today on my ntv650 and failed. Outside on a nice warm day bought a nice long screwdriver and couldn't Find the adjuster screw doset sit exactly below the air filter hole a little more foward and I couldn't see a thing down the hole And the screwdriver I got was too big and it tried rounding the screw.
Lucky I pulled the airbox off to see how they fitted I should have used a torch to shine under the airbox
Anybody been frustrated doing this job
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gills
Bad ass biker
Posts: 262
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Post by gills on Jul 1, 2014 14:39:15 GMT 1
I can empathise with you - it can be a pig to find the screw. There's no doubt a decent screwdriver helps. At least now you've done it once it should be a lot easier next time.
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undercover
All Weather Rider, well hard
Posts: 186
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Post by undercover on Jul 2, 2014 2:02:29 GMT 1
I can empathise with you - it can be a pig to find the screw. There's no doubt a decent screwdriver helps. At least now you've done it once it should be a lot easier next time. can i ask you a question i seems like the idle screw adjusted my right carb and the adjuster below the air filter adjusted the left carb. there is no mention of this in the haynes manual or this forum so i can only guess i have a fault somewhere. i did manage to balance them even though i thought it was a case of balancing both carbs with the adjuster screw under the air filter then setting the idle '' with the idle adjuster '' even with this unsolved problem i have masterd the adjuster screw under the air filter once you get it it's like riding a bike
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gills
Bad ass biker
Posts: 262
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Post by gills on Jul 3, 2014 13:28:04 GMT 1
The balancing screw under the air filter should alter the position of the r/h throttle in relation to l/h throttle. The aim is to get the same vacuum reading on both, irrespective of what the values actually are. The idle speed screw can be used to adjust how far open both throttles stay when there is no tension on the throttle cables, which sets the idle speed. As you have found, boh usually need to be adjusted to get the carbs setup right.
There is an idle mixture screw on each carb, but these are factory set and then capped. It is quite possible these caps have been removed by now, but correctly setting the idle mixture is hard as there is no way to measure CO on each cylinder individually.
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undercover
All Weather Rider, well hard
Posts: 186
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Post by undercover on Jul 4, 2014 2:43:44 GMT 1
Gills i cant thank you enough
now i have the bike running better now and maybe i am over thinking but for any reason i need to increase the rpm at idle.
would turning the idle speed up mess up the balance i have done
also there is pilot screw settings in the hayne manual so you would turn the pilot screw in then turn it out
but i agree unless all else fails then try the pilot screw
here is a list in the haynes manual for anyone that might need this info
pilot screw settings (turns out)
600 cc engine j and k models 1 3/4 m models 1 7/8
650 cc engine p models 2 1/2 s and t models 2 1/4
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numpty
Rides on the Motorways
Posts: 90
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Post by numpty on Jul 4, 2014 10:22:44 GMT 1
would turning the idle speed up mess up the balance i have done
also there is pilot screw settings in the hayne manual so you would turn the pilot screw in then turn it out
but i agree unless all else fails then try the pilot screw
When you`re balancing the carbs you should increase the idle speed with the adjuster to a `fast idle` anyway to be able to get a steady reading on the gauges. Unless you`ve already messed with the pilot settings, I would leave them alone until you are sure that they have to be altered.
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Post by De Graaf van Salland on Jul 4, 2014 12:03:27 GMT 1
See also: this link But I found a digital pressure meter less practical. GvS
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