argentum40 Posted October 11, 2011 Share Posted October 11, 2011 Ok so the symptom is my CBR600 is erratically firing on one of the cylinders... Seems ok at higher revs but misses alot at lower revs.. I have changed the coil pack and its still the same and my question is this... Each coil pack has 2 wires connected to the back of it...Does each wire control the firing on a single plug?... I have wired it up exactly as it was and other day i swapped the actual plug leads over and it fired fine on the 'dodgy' cylinder... If each individual wire controls a single spark plug then its probably just a ropey connector or wire even but if not i am stuck..Seems wierd that it fired ok when i swapped the HT leads over from 1 to 4.. Any ideas lads? Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted October 11, 2011 Share Posted October 11, 2011 the two feed wires on the rear of the coil are positive and negative they have nothing to do with making each cylinder fire as the coil sparks on both cylinders at the same time.it sounds more like the ht lead breaking down Quote Link to comment Share on other sites More sharing options...
argentum40 Posted October 11, 2011 Author Share Posted October 11, 2011 the HTs are different ones EAB... unless the other ones are knackered as well like as it was a second hand coil... New Hts are nearly £35 each Quote Link to comment Share on other sites More sharing options...
Stu Posted October 11, 2011 Share Posted October 11, 2011 You can buy HT lead in lengths and but it down and would prob work out cheaper Also check plug caps Quote Link to comment Share on other sites More sharing options...
argentum40 Posted October 11, 2011 Author Share Posted October 11, 2011 You can buy HT lead in lengths and but it down and would prob work out cheaper Also check plug caps problem is Stu the plug caps are sealed onto the HT leads and cant be removed... And as the plugs are like 10 miles deep in the engine cant just use normal plug caps Quote Link to comment Share on other sites More sharing options...
Stu Posted October 11, 2011 Share Posted October 11, 2011 hmmm so you cant just replace the leads for £35 each then ? is this 35 quid for a new coil and lead? Quote Link to comment Share on other sites More sharing options...
Tango Posted October 11, 2011 Share Posted October 11, 2011 Definitely sounds like the coil pack/HT leads are faulty. My car suffers with the same thing.....stutters and holds back when putting it under load at lower revs in higher gears.....but is OK when you rev the n*ts off it.....Does anyone do OEM versions for your bike? People mention David Silver (I think that's right) when talking about Honda parts...... Quote Link to comment Share on other sites More sharing options...
Stu Posted October 11, 2011 Share Posted October 11, 2011 yeah david silver spares is the honda's guy you could replace coils with just pattern parts they are some good ones out there you need to narrow the problem though if you cant replace the lead it might be worth replacing the coils have you got 4 coils or just the 2 ?just re read you have two coils might just be worth replacing both with all new leads and caps? Quote Link to comment Share on other sites More sharing options...
argentum40 Posted October 11, 2011 Author Share Posted October 11, 2011 replacement coils are about £60 each and HT leads complete with spark plug cap are between £32 and £35 each so would cost nearly £250 for to replace them.. I havent seen any pattern parts as replacements for the HTs and the coils are pattern parts. God knows what genuine Honda ones would cost.. Bearing in mind i have replqaced the coil already Quote Link to comment Share on other sites More sharing options...
Tango Posted October 11, 2011 Share Posted October 11, 2011 Pattern plug caps......(sorry Stu,delete if you think this is inappropriate)...http://www.busters-accessories.co.uk/pr ... er3url=NGKBusters also do HT lead by the metre.Bob Quote Link to comment Share on other sites More sharing options...
Stu Posted October 11, 2011 Share Posted October 11, 2011 coils can be had for £45 http://www.busters-accessories.co.uk/pr ... tion-Coilsyou could prbably get the lot for less then £60 a set still £120 notes though Quote Link to comment Share on other sites More sharing options...
argentum40 Posted October 12, 2011 Author Share Posted October 12, 2011 those plugs are nowhere near deep enough... the ones on the CBR need to be about 6" long as the spark plugs are deep in the engine..Stu £45 is alot better than 60 its true enough... i will have to see if i can fine somehwere else to get the leads from as theres no way i am forking out nearly 150 for 4 of the buggers Quote Link to comment Share on other sites More sharing options...
Tango Posted October 12, 2011 Share Posted October 12, 2011 If you go to the drop down box and go down to the SD05FM plug caps they are 108mm long. There's a few others there too of varying length. Wouldn't have thought your plug caps were any longer than that.Good Luck,Bob Quote Link to comment Share on other sites More sharing options...
Stu Posted October 12, 2011 Share Posted October 12, 2011 Also look on ebay for the leads you will only need about a meter and half max Quote Link to comment Share on other sites More sharing options...
Stu Posted October 12, 2011 Share Posted October 12, 2011 2.5 meters for £2.50 http://www.ebay.co.uk/itm/HT-High-Tensi ... 0865683382 Quote Link to comment Share on other sites More sharing options...
argentum40 Posted October 13, 2011 Author Share Posted October 13, 2011 ah right apologies lads i didnt see the drop down box... hhmmm might be worth a punt so thanks guys for the help i appreciate it Quote Link to comment Share on other sites More sharing options...
Tango Posted October 13, 2011 Share Posted October 13, 2011 Hey....no probs mate.... If the plug caps need to be longer than that you might want to check that your engine hasn't been put in upside down.... Busters also do HT Wire.....so if you go down that route it may save you a bit on P&P buying from the same place.... Quote Link to comment Share on other sites More sharing options...
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