peps
Guest
I recently bought 2003 1150GS twin spark 20k. It’s ok but didn't feel as powerful as I'd expected (but then my other bike's a Vmax!). Basically there's a drop off in acceleration at max load (typically noticeable at +4500rpm in 5th gear) and a hesitancy through the 3500rpm range. After being side tracked establishing the fuel pressure is ok I've now found the top suspect - poor & nil spark of both primary spark plugs, possibly due to failed stick type coils (they look swollen with corrosion).
Replacements are a bit pricey especially if it turns out to be some other component, is this a common problem, anyone else been here before. I know the obvious thing is to book it in to BMW and have their computer thingy check it out but there's a longer waiting list than there is to get a hip replaced and I assume I'll be fleeced for a gazillion quid the minute my bike disappears into the workshop. So:
1. If you've got a twin spark with the above symptoms, suspect the primary spark/s have failed.
2. Is this a common problem, if so can I safely assume new stick coils will solve it.
3. If I mortgage the house and buy new coils (obviously buy just 1 at first and check that I get a good spark back), have BMW changed their design, or will I have to replace the replacements in 3yrs time.
4. Is this typically shoddy BMW engineering, or a 1off hiccup?
5. I did consider routing the secondary plugs HT leads onto the primary plugs as a get around and just having a standard single central spark head, anyone done this?
many thanks in anticipation for your constructive answers
peps
ps, If anyone lives near Swindon and would let me try out their good HT cap/coil to confirm me suspicions, please pm me.
Replacements are a bit pricey especially if it turns out to be some other component, is this a common problem, anyone else been here before. I know the obvious thing is to book it in to BMW and have their computer thingy check it out but there's a longer waiting list than there is to get a hip replaced and I assume I'll be fleeced for a gazillion quid the minute my bike disappears into the workshop. So:
1. If you've got a twin spark with the above symptoms, suspect the primary spark/s have failed.
2. Is this a common problem, if so can I safely assume new stick coils will solve it.
3. If I mortgage the house and buy new coils (obviously buy just 1 at first and check that I get a good spark back), have BMW changed their design, or will I have to replace the replacements in 3yrs time.
4. Is this typically shoddy BMW engineering, or a 1off hiccup?
5. I did consider routing the secondary plugs HT leads onto the primary plugs as a get around and just having a standard single central spark head, anyone done this?
many thanks in anticipation for your constructive answers
peps
ps, If anyone lives near Swindon and would let me try out their good HT cap/coil to confirm me suspicions, please pm me.
