COP harness, no hacker option

[E.Marquez]

Not a new thing, not a performance upgrade. If you have wanted to clean up the VTR frame area up front, shed a bit of weight, replace old spark plug caps, leads and coils by installing Denso Coil On Plug coils...but did not want to hack up your harness or do any wiring at all.

Folks have been doing this for some time now, using used wiring harness parts and there is nothing wrong with that at all....its how I did mine years ago. Others tried less reliable methods with varying results....in the DIY with what they had on hand or the local hardware store.... If it works, its not wrong.

Last month I was asked to make some harness as the owner was not comfortable making their own, did not want to buy all the supplies and tools needed, another chimed in and wanted something plug & play....So I spent some time with my wiring suppliers and we found the proper sealed connectors to mate with the VTR coil wiring harness plug and Denso coils. With that a plug and play COP harness using high quality sealed connectors, wire, and sheathing was born.

Using used long Denso coils and part of the stock rubber spark plug boot to make a seal for the COP is the better weather resistant plan I think and has worked well in the rain here in the states..Going on 6 years now and all of the COP's I have done for folks and my bikes and working great...

coil bottom prepped.jpg (15.47 KiB) Viewed 1987 times

OEM boot cut.jpg (28.34 KiB) Viewed 1987 times

Long coil with OEM seal.jpg (13.62 KiB) Viewed 1987 times

You can use the shorter coils from something like a CBR600 they physically fit and electrically work just fine. But you can not use the OEM spark plug boot seal to seal out weather at the head. The coil design just is not adaptable for them. But they are cheaper to buy then the longer coils...you just need to figure out how to seal them to the head.

Likely with $24-36 shipping, its not something you blokes would want to buy, and this forum in particular tends to be more DIY than others Im on....Its one of the things I like about this cranky group.....
But figured put it out there and If you want to build your own and need help..ask

I'll say, the crimpers needed are not common bit of kit even if you do bike wiring of lights, and other things. And supplies needed if this is about all you will uses the stuff you buy will greatly drive up the cost. I also don't have a UK supplier for the proper connectors....