Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

Do you have bar end shifters and brake shifters?

Do I look like the kind of flat track drag strip racer that needs brake shifting?

So you've only 2 shifters?

On the Shiv, yeah.

Yeah so you're not answering my question. Useless.

This is a 3-port junction. It is what my shifters plug into.

Junction B is for the two derailers. If you are running more shifters you need the 5-port. If none of that answers you question then I don't understand your question.

Should've been clearer, have bought the groupset knowingly without the charger and was a bit stunned by the £70 price tag for official SM-BCR2 Shimano one. Was just wondering if I really needed that or if I could just get something from Maplins to charge it up. Just being cheap really.

Need the legit one sorry.

Nah you answered I need the 5 port.

Hey @andyp want to trade that 5 port junction box on the Cayo for a 3 port I have? Guess you won't be running tt shifters.

Depending on mileage you will probably be able to just borrow the charger for the rare occasion you actually need to charge...

Lol I charge one a fortnight.
Right your bike more!

A di2 battery does about 60h to dead for reference @ArfurPill

Mines on a Tt bike that's on a turbo most of the year, I think I charged it 4 times in 2016!!

I have discovered my p2 has a solid body shell, is there some clever, or drill driven way I can still run an internal battery?

Ha yes. I charged my tt bike when I got it last year I think march, not charged it since!

Yes like I have. It's a bit fiddly.
I'll post up how this evening. But you need to drill the top tube and then feed fish wire or thin wire from down tube to swat tube. It's fiddly but do able. Then battery and junction box in seat tube.

pretty sure you don't need the 5 port to use the tt shifters and tt brake lever shifters together, you can use the dumb jc41 along with the 3 port junction instead.

Ah really. Ok I'll try that and see if it works, when I get them. I've a spare junction b box anyway.

If you don't ride the bike for a few months the battery seems to discharge completely too. They do come up on ebay, I got battery + charger for £50

You sure you don't have a short circuit? My Shiv sits idle for months in the off-season and still holds its charge.

You shiv lives in your warm house.
My bike lives in the sub 0 garage. So that kills mine quicker.

I'm doing this at the moment on my 2012 P2. To say it's 'a bit fiddly' is an early contender for Understatement of the Year 2017!

I've ended up making the following modifications to my frame:

1. New hole in front the top tube by the stem for the Di2 cable to go into
   
2. Enlarge hole in seat tube where the mechanical cable comes out to allow a Di2 cable to pass through it
   
3. Enlarge hole at bottom of bottom bracket shell and through the carbon fibre web above it to allow two Di2 cables (front cable and cable to RD) to pass through it - I've enlarged them to 9.5mm.
   
   

Then it's a case of using wire, string, cotton, old gear cables and magnets to thread the cables.

You've never been to my house - I didn't have heating for the two coldest years in the history of the universe of the united kingdomz of Britishland and I bet your garage isn't sub-zero.

Anyway, the cold only really messes with NiMH batteries. Li-Ion batteries are pretty good in the cold.

Magnets, you say?

Yeah that's it. That's what I did.
It wasn't that bad, I've done more fiddly jobs. but I did swear and take a few tea (frustration) brakes.
I used a bike stand to hold the frame upside down, gravity then helped thread the cables through the holes, just change the angle of the frame.

Gravity and magnets. Watch out for the black hole opening.

fair enough, I thought my di2 was draining a bit fast, but maybe it's just older and used a bit now.