CBRRRT

Running a break line through a single sided swing arm

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I found a company on the interweb the other week that do break lines that can be assembeled at home and it got me thinking.
Hmmmmmmm!!!
How nice would it look if I had my rear line going through my swing arm??
So I went about ordering the bits I needed from Venhill lines from Dorking in Surrey and had a chat with a very nice lady called Caroline and she put me right on all the bits I would need.
The first thing she told me I didnt know was that the pitch on the banjo bolts for a Honda is 1.25mm, I never knew that, did you?



Anyway, at the rear of the arm in just about the perfect spot there is a little tab that was just begging for a hole to be drilled through it. Up the other end there is another one..... we will come back to that one later.


So I gave it a jab with a punch and gave my self a mark to drill



Now Im guessing that there is a two box section in the arm because the drill only went in about 50mm, but that said there is loads of room to wiggle the new line through.



Now then, after thinking about it I thought it might be wise to remove the shock as there are two holes each side of it I may be able to use to get a pull through up the inside of the arm, and also to turn the line out of the arm and up to the master cylinder.



Removing the shock gave me a better angle to drill the hole at the top end of the arm.



First thing I did was shove a bit of wire through the first hole I drilled at the bottom of the arm and push it through to the hole on the left of where the shock would normally be.



Then I taped a length of string to it and pulles it through. I then got the same bit of wire and bent it to a hook shape and and pushed it through the hole to the right of where the shock would be, and fished about untill I found the string and then pulled it through.



My front break lines were factory made both ends, but I had just one end of the rear line factory made to make it easier to get through the arm.



Anyway, back to the top tab. It was hard to drill, much harder than the bottom one so I stuck my finger in the side hole to the right of the shock and found at the point where the tab was it wasnt hollow.
Never mind, I'll sort that out later. I drilled a hole just below it.



Next I tied the string to the line and covered it in tape to make it pull through without snagging as it went up the inside of the swing arm.



And started pulling





untill it came out the other end



Now that wasnt hard to do now was it!?

Its really difficult to get an accurate length for the rear line so when I placed my order with Venhill I made sure the line was over long, so I had one made up to 1200mm



While I had the caliper off I thought I would give it another lick of paint, so gave it a really good clean and then three coats of paint.



I then attached the rear of the line making sure I used new washers on both sides of the new banjo bolt.



I then went about getting the length of the line right.



I could have come round the front of the exhaust, but I thought by going round the back I could put a coil in the line and when the swing arm is bouncing around it would absorb some of the shock.



Its a bit easier to see what I mean from a slightly different angle.



The outside of the steel braid has a clear plastic coat on it that has to be removed, about 25mm, to get the outside fitting over the line. Then about 4 to 5mm of steel braid was snipped off with some electrical side cutters so the olive would slip over the teflon inner tube.



Once it was all made up I just went round the end with a little black tape so it looked like the factory made ends.



And the jobs a good-un.
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Comments

  1. Gix11's Avatar
    Brilliant! Thanks Jon. I might have to do that when I actually get my bike finished. Cheers mate. The simple touches with detail make the bike!
  2. CBRRRT's Avatar
    I'm sure the lads in your area would be only to glad to give you a hand buddy