AdeyT Posted July 15, 2013 Posted July 15, 2013 This past week my 2001 ZZR600 (20k on the clock) is sounding lumpy when setting off until the revs pick up to around 2k, it doesn’t happen all the time and only starts to do it after about 3-4 miles, don’t know if it’s my imagination but seems to happen more the longer the distance travelled coming up to a junction without having to use the throttle. I changed the plugs this weekend hoping that might cure it but the same thing happened again on my commute to work this morning. I don’t want to start throwing money at it in the wrong direction and would like to take it to a garage with maybe some ideas of what could be the problem, any suggestions greatly appreciated. Quote
AdeyT Posted July 15, 2013 Author Posted July 15, 2013 first thing I would do is balance the carbs up Thanks for that, was thinking that may be the next best step. Quote
Grumpy Old Git Posted July 15, 2013 Posted July 15, 2013 Clean or replace the air filter before balancing the carbs. Check the auto-advance is working. Use first gear at low speeds. Buy a Bandit. Quote
Tango Posted July 15, 2013 Posted July 15, 2013 Cr*ppy idle jet(s)......main jets OK though..... Quote
AdeyT Posted July 16, 2013 Author Posted July 16, 2013 Definitely getting worse, time to get it booked in Quote
megawatt Posted July 16, 2013 Posted July 16, 2013 Why book it in? Fix it yerself and save money? Sounds like pilot/idle jets to me. Strip carbs and give em a good clean. Also check fuel tap filter isn't partially blocked. Quote
AdeyT Posted July 16, 2013 Author Posted July 16, 2013 Why book it in? Fix it yerself and save money? Sounds like pilot/idle jets to me. Strip carbs and give em a good clean. Also check fuel tap filter isn't partially blocked. I try and do most the repairs on the bike and my car but I've limited tools, workspace and knowledge, when it comes to the more complex things like carbs I would prefer someone with far more experience and the right tools to do the job hopefully at not a too silly price. When it comes to a problem like this where there could be lots of reasons for it happening I have to weigh up the cost of paying someone who hopefully find out quickly whats wrong and fix rather than me trying allsorts and speniding time and money on the wrong things and having the bike off the road. Quote
acting_strange Posted July 16, 2013 Posted July 16, 2013 There is plenty of information out there on the internet that can help you with working on bikes etc...Stripping carbs requires minimal tools, usually just a couple of spanners, pair of pliers and screwdrivers...The hardest part is balancing the carbs...I have a carbs balancing kit which you are welcome to borrow if you are near enough but if not they are not that dear to buy...until you have a go you will never learn... Quote
AdeyT Posted July 16, 2013 Author Posted July 16, 2013 There is plenty of information out there on the internet that can help you with working on bikes etc...Stripping carbs requires minimal tools, usually just a couple of spanners, pair of pliers and screwdrivers...The hardest part is balancing the carbs...I have a carbs balancing kit which you are welcome to borrow if you are near enough but if not they are not that dear to buy...until you have a go you will never learn... Thank you for the offer. To be honest I do like doing the work myself and with the help of the haynes manual and researching on the net I don't mind tackling most jobs, at the moment I don't have a lot of time and trying to strip down carbs in an organised fashion in a 6x8" concrete shed is not ideal, although I'm tempted by the challenge and will look into it I will probably leave this one. Quote
Chrissb6 Posted July 16, 2013 Posted July 16, 2013 Agree, either the carbs or tired electric's - plugs and coils Quote
AdeyT Posted July 17, 2013 Author Posted July 17, 2013 Had a multi meter on the battery, 12.5v before starting up, tick over was 12.5v and 12v with headlight on, went up to 14v when reved up then went back to 12v on tick over, all the voltages stated were wavering up and down by 0.1-0.3v. Voltage at one point on tick over went down to 11.8v. The battery is less than a year old and is holding charge so I am thinking it may be the regulator, any thoughts? Quote
acting_strange Posted July 17, 2013 Posted July 17, 2013 Had a multi meter on the battery, 12.5v before starting up, tick over was 12.5v and 12v with headlight on, went up to 14v when reved up then went back to 12v on tick over, all the voltages stated were wavering up and down by 0.1-0.3v. Voltage at one point on tick over went down to 11.8v. The battery is less than a year old and is holding charge so I am thinking it may be the regulator, any thoughts? If the voltage went up to 14V when revved and the lights on then it is charging....it wont charge at tickover...here is a good article to read on carbs http://www.classicfordmag.co.uk/files/2011/07/CLF166.bike_.pdf ...I still think you have a jet blockage or dirt in the float bowls...and here is a video showing how bike carbs work http://www.youtube.com/watch?feature=player_detailpage&v=uMAKyTvjqaQ Quote
AdeyT Posted July 17, 2013 Author Posted July 17, 2013 Had a multi meter on the battery, 12.5v before starting up, tick over was 12.5v and 12v with headlight on, went up to 14v when reved up then went back to 12v on tick over, all the voltages stated were wavering up and down by 0.1-0.3v. Voltage at one point on tick over went down to 11.8v. The battery is less than a year old and is holding charge so I am thinking it may be the regulator, any thoughts? If the voltage went up to 14V when revved and the lights on then it is charging....it wont charge at tickover...here is a good article to read on carbs http://www.classicfordmag.co.uk/files/2011/07/CLF166.bike_.pdf ...I still think you have a jet blockage or dirt in the float bowls...and here is a video showing how bike carbs work http://www.youtube.com/watch?feature=player_detailpage&v=uMAKyTvjqaQ Thanks for the info. A friend of mine who know electrics said that the voltage should be constant not wavering and shouldn't be as low as 12v at tick over which led him to believe the regulator was faulty. His thinking was yes the battery is charging but at lower revs the regulator is not supplying the bike a high enough or constant voltage. Quote
acting_strange Posted July 17, 2013 Posted July 17, 2013 Had a multi meter on the battery, 12.5v before starting up, tick over was 12.5v and 12v with headlight on, went up to 14v when reved up then went back to 12v on tick over, all the voltages stated were wavering up and down by 0.1-0.3v. Voltage at one point on tick over went down to 11.8v. The battery is less than a year old and is holding charge so I am thinking it may be the regulator, any thoughts? If the voltage went up to 14V when revved and the lights on then it is charging....it wont charge at tickover...here is a good article to read on carbs http://www.classicfordmag.co.uk/files/2011/07/CLF166.bike_.pdf ...I still think you have a jet blockage or dirt in the float bowls...and here is a video showing how bike carbs work http://www.youtube.com/watch?feature=player_detailpage&v=uMAKyTvjqaQ Thanks for the info. A friend of mine who know electrics said that the voltage should be constant not wavering and shouldn't be as low as 12v at tick over which led him to believe the regulator was faulty. His thinking was yes the battery is charging but at lower revs the regulator is not supplying the bike a high enough or constant voltage. Do you have a car....go check that the same way....it will be roughly the same... Quote
Chrissb6 Posted July 17, 2013 Posted July 17, 2013 Well that low voltage on tick over could upset the coils hence the poor pick up from low rev's. It could be the regulator but first make sure that all the connection are clean and tight. Then start looking at components. The ZZR6 must be getting on now it could just be tired electric's Best of luck your defiantly onto something. Quote
AdeyT Posted July 17, 2013 Author Posted July 17, 2013 Well that low voltage on tick over could upset the coils hence the poor pick up from low rev's. It could be the regulator but first make sure that all the connection are clean and tight. Then start looking at components. The ZZR6 must be getting on now it could just be tired electric's Best of luck your defiantly onto something. That's what I thought, I'll charge the battary and check the connections and do a few tests on the stator and regulator. Quote
Tango Posted July 17, 2013 Posted July 17, 2013 Hmmmm.....dunno mate....but I thought 12.5v at tickover is probably OK.......if the voltage starts dropping whilst ticking over (down to 11v or less) then I'd think the charging circuit could be faulty......and the instability you see could just be the meter hunting......personally I wouldn't be worried at seeing that..... This still sounds more like carburation than electrical to me......but hopefully your mechanic can sort it for you...... Quote
megawatt Posted July 17, 2013 Posted July 17, 2013 Doesn't sound like an electrical problem to me? Quote
AdeyT Posted August 5, 2013 Author Posted August 5, 2013 Bike now fixed and running better than ever, Turned out that it was a corroded float jet, the guy who sorted it for me also balanced the carbs, set the mixture and tidied up some wiring at a not too bad price. Very happy Quote
Tango Posted August 5, 2013 Posted August 5, 2013 Nice one mate. .........glad you got it sorted. .......and thanks for letting us know what it was....... Quote
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