Tickover low and erratic.

[jonny.boyd]

Hiya all.

Right this has only started happening this week. Basically i'll start up the bike, turn up choke to get the engine warmed up a bit. When it's been revving away for a bit i'll reduce the choke and set it so it's idling around 1.5k - 2k RPM. I'll then drive away quite happily. i'll then completely drop out the choke after a couple of minutes of riding. I then find that for the first 30 mins or so of driving when i pull to a stop the revs drop down to 1k rpm (i can feel that bike struggling to keep turning over) and wen driving along can feel the bikes acceleration act bike weird (when cruising). After about 30mins of riding the revs return to normal and the bike will then idle at around 1.5k and bike sounds and acts like normal. I know this sounds like a tiny problem but it's only just started doing it this week (so its making me worry).

Any advise would be greatly appreciated to put me out of my misery!

[Bikes a Curvy, 2000 model]

[sunshine]

balance the carbs should solve the problem i believe.

[gettin2dizzy]

+1 to balancing carbs.

[jonny.boyd]

Thankyou for the incredibly prompt replies!! Since i'm in no way mechanically minded and don't have the tools.. how much of my money would i expect the garage to steal if i got it done at one?

[sunshine]

i dont pay for it they spend 15 minutes doing it when there quiet.

[husky03]

too much-get yourself a set of carbtune gauges , about 45 quid and you'll be able to do them in future

http://cgi.ebay.co.uk/Carbtune-2-cylinder-vacuum-gauge_W0QQitemZ120482954488QQcmdZViewItemQQptZUK_M otorcycle_Parts?hash=item1c0d57fcf8

[bobbleheadbarne]

just got mine done looking at 150 dont go to the dealer they will screw you runs well better now as i had the same problem i only use choke now for 2mins and idles 1300rpm

[gettin2dizzy]

£150! Ouch!
Ask around, someone on here may be able to help. I would happily do it but you're miles away

[bobbleheadbarne]

sorry that was with new shims for top overhaul

[jonny.boyd]

So pretty expensive then!! Anyone around Midlands / Home Counties areas that has the balancing kit? I would pay for your time... i just don't think i'd be able to do it myself (dont have the confidence).

[bobbleheadbarne]

try small garages they maybe cheaper like i said 150 that was for new shims and top overhaul and carb balance

[yorkie_chris]

It's less than an hour of a job. However I'd check some other things as well as the balancing.

[jonny.boyd]

What other things would you suggest be checked YC?

[yorkie_chris]

The plugs and check the carbs for water and crap build up. fact it improves when hot means it could be a little lean.

If carbs are badly out the rear tends to run rich and the front run a bit hot.

[jonny.boyd]

Hiya there, just called the garage who i bought the bike from (is still under warranty) and surprise surprise they gave me a whole list of things that it could be which meant it wasn't their responsibilty!!

Firstly they said that a restrictor could cause this to happen (only started happening this week, so thats unlikely!)
Then said that it could be dodgey fuel (only topped it up at the weekend)
Gonna fill it up tonight anyway so will see if that does anything.

I was quoted by another garage just under £50 for a carb balance, is it worth doing? Does the restrictor kit affect the balance of the carbs?

[gettin2dizzy]

You would be able to buy a carbtune for under £50. They really keep their value so if you sold it on you could do it for free. It's v. easy.

What about this warranty though? Did you buy a s/h bike from a dealers?

[jonny.boyd]

yeah was s/h from a yamaha dealer. But their throwing around excuses so doubt they'll actually do the job unless the bike has physically stopped running.

[gettin2dizzy]

It is their responsibility though. The premium you pay for a bike from a dealer is for this service. I''d just get rather vocal about it around potential customers of theirs.