Not quite new but

[rwkolkema]

I just completed my v-rod trike conversion,and been riding for about a week.
I've notice I need to pump my rear brakes quite a bit to get any grab.
I've bleed the system and theres no air,and I also adjusted the pads,I'm
starting o think that the stock v-rod master cyclinder set up might be a little
under sized meaning the stock setup only had to handle one rear disk,and now
that theres 2 rear drums it can't handle it.Any imput would be great.
Sorry for no pics.but I haven't see the sum for a week,and by the way
the trke kit is made by moto trike for the HD v-rod.
Thanks Roge

 

[Nana]

Not an answer about the brakes..... but big congrats on the new trike! The V-rod makes a stunning trike, and I can't wait to see your pictures!

 

[White Knight 04]

Please don't think I'm trying to be smart here... You bleed the brakes on a bike different than a car instead of pumping them up and holding pressure on them then releasing the bleeder you must open the bleeder squeeze the brake down then tighten the bleeder or use the vac um method...

 

[ShovelEd]

The correct bore size of the front or rear brake master cylinder is dictated by the number of calipers used and size and number of pistons on each calipers. On stock motorcycles the rule of thumb is:

5/8" bore for single caliper early F & R and most 77-83 dual disc front
9/16" bore for later front single caliper 84 up
11/16" bore for later dual disc dressers like FLHR
3/4" bore for early dual disc dressers like 80-83 FLT

It's best to use the recommended one for your motorcycles year/model, but if you change to multi-piston calipers like Performance machine, GMA, or Jaybrake, you can increase or decrease bore size to suit your taste. Decreasing bore size increases lever travel and stopping power. Increasing bore size decreases lever travel and gives a much firmer feel to brakes. There are limits though and using too small a bore size for multi-caliper/multi-piston braking may not provide enough volume to stop adequately.

 

[bdn56]

I can't help you on the brake issue. After extended non riding times, I would have to pump my rear brake 2 or 3 times before it would be back to normal.

The first few weeks on my trike, I couldn't use the rear brake. My leg would not bend enough. I went a little slower and used the front brake.

If I go back to a trike, I think it would have to be a V Rod.

 

[Frozenshrimp]

Roge Welcome to the forum from the Sooner State!! No help with your brake problem.. RIDE SAFE!!