new coils

[toddthompson]

Hi, I need some help from the group. I hope you can assist us.

My wife just purchased a 1994 R100RT. We left it at the dealer to do a once over and tune up to base line the bike. The mechanic suggested we replace the original inginition coils and "up grade" to the newer style that most owners have completed. (??) I would like to assume that this swap of coils is something I can do easily and save a few bucks and learn about this biike.

I'd like to buy a used set if I can. However, I don't know what to ask for when buying these "upgrade coils".

Or am I being risky in buying these used coils and getting my self over my head in thinking I can replace these myself?

The original coils in the bike fail if you remove one spark plug lead. The new upgrade style will allow the bike to run on one cylinder if the other side fails for some reason. It seems to be a good idea to make this coil upgrade.

Thanks for your help

Todd T.
1992 K75 RTA

[LBM]

Replaced coil on my 88 R 100Rt. Coil overheats, drys out and cracks. My wife and I were away for a weekend trip and it began to rain. 15-20 mins later, bike dies. Cranks over fine but will not fire. Sit on the side of the road for 15-20 min, engine heat dries out the wet coil, bike fires up, another 15-20 mins repeat the process. We planned the rest of that Sunday afternoon outing around stopping under overpasses every 15-20 mins before the bike died.
My suggestion- replace them. And yes if you can remove the tank, you should be able to replace the coils yourself.

[Rbike]

I'm not sure what they are trying to sell you as "upgrade coils". I also don't know of any standard failure rates on the modern style your bike should already have. It should be a single coil with two secondary leads comming out of it rather than two seperate coils.

Are they wanting to convert your system to have seperate coils? Not sure how that will help anything because the bike won't hardly run with one dead cylinder.

Like stated above, it is an easy job to replace them.

[lkchris]

There were some problems for a while but I think they may have been fixed by '94.

Check part numbers here:
http://www.motobins.co.uk/services.php#Few%20unreliable

You have only a single coil, of course ... with dual outputs.