Twin spark misfire??

[havelockjohn]

My 1150 Rockster seems to be a little low on power, a bit vibey and the header pipes have a blue tint to them. It also feels like a misfire.
Would i be correct to asume the set up is the same or close to the GS?.
I should mention the bike has a de-cat and a quill exhaust and as far as i know it has no ECU mods.
I was told the exhaust could cause it to run lean, could the blue pipes be a symptom?
The bike is new to me so i am gradually catching up with the servicing.
On inspection of the plugs i noted that the right hand plugs were darker with a crusty appearence. On the left hand side they were a light grey, almost white shade.

Any suggestions out there, please

John

 

[elevensies]

yes, same as GS, and exhaust mods can make them run very lean on full throttle.
running rough you say, a bit more info would help. could even be that what you think rough, is not at all

 

[motobiker]

just to add.. blue downpipes are absolutely normal... not symptomatic of anything.

If you're mechanically competent.. buy a haynes and give the bike a full service. you can buy a kit.. including all you need except fluids from Motorworks. link at the top of the page.

Otherwise find a local independent to do it for you. This post might be handy if thats your choice:http://www.ukgser.com/forums/showthread.php?p=901341

 

[havelockjohn]

Rockster blues

Thanks for that guys.
I think i am leaning more towards the misfire theory and the fact that i will also need to modify the ECU.
I purchased a manual on cd but the wrong one was supplied, so i have been set back slightly.
At the moment i am unfamiliar with the configuration of the ignition system, but it looks as though it may have indipendant coils. Is that correct?
Are they prone to coil problems?
I intend to catch up with servicing, which might sort it if i'm lucky.
I have owned two 1100s's, and found them much smoother to ride. But i know little about the 1150 T' sparks.
Any reccomendations on ECU mods would be appreciated.

Regards

John

 

[Colban]

Hi John.The usual cause of misfiring on a twinspark motor is the plugstick(coil/cap assy);do a search for an easy test method from Steptoe.
You might also want to check out "CCP mods" (that's Cat Code Plug)or how to change the fuelling in the ECU with a jumper.

 

[havelockjohn]

Twin spark

Thanks for that.
Will get on the case tomorrow.

Cheers

 

[gas boy]

Hi Jon

I have an 03 twin spark Rockster - I run this with a y - piece cat eliminator and a straight through Remus end can and have had no problems at all - except for the fuel consumption - but I put that down to my riding style

 

[Mort]

I have an 03 twin spark GS with a Y piece and Remus, mine started to run rough last summer out of the blue. Turned out to be a coil pack, the're about £25.00 each.

 

[SCORPIOTED]

John, I've got an 1150GS Twin-spark and had exactly the same issues when I removed the cat and replaced it with a Remus Y piece. I replaced the cat and it returned to even, smooth and misfire free running. Try that first. I got rid of the Y piece because of the misfiring issues. I was happy to suffer the added weight of the cat and have a smooth running bike !

Regards..................Scorpioted

 

[ELIMINATOR]

Coil pack £25 each

pray tell where you bought them from at that price?

 

[Mort]

Coil pack £25 each

pray tell where you bought them from at that price?

I bought them last year....I was guessing

 

[Bigyin]

Coil pack £25 each

pray tell where you bought them from at that price?

I was just thinking the same and thinking about making a bulk order to flog on at 20 quid a pop mark up and still look like the most generous bloke around with a guaranteed order list

My 03 1150 had a misfire at 5,500 and solved with the replacement of the coil packs

 

[ELIMINATOR]

indeed at about £60 ish a pop.

Are the new ones better made, as I read on here thatt hey are the same as the 1200 type.

Anyone know the truth of my statement?

 

[Zach]

£65 from Benhams

Yes they are the same as the ones used for 1200's

one of mine packed up causing rough running/misfire/difficulty in starting

try testing before buying

 

[jamesv]

Bigyin - Coilpack down

Thats a coincidence! Mine is an 03 twinspark and is missing (flatspot) at 5500 revs, have been advised it may be a coilpack, am having it checked tomorrow so hopefully it will be sorted. Good info mate!

Cheers