headpipe on the HD Trike

[robandlyn]

hi all,
So snowmobile season is over and I am back ....LOL ...
it basicly was horrible here in the Northeast (no snow) but
I trailered to the Canadian border for some sledding fun.
Well we are still fighting the excess heat problem on Lynn's trike.
So this year we are starting out this year by installing a set of
Rush 1.75 slip-ons (cus she likes the sound of mine).

Before ordering the set I checked under her trike just to make
sure we could use the same slip-ons as a regular bagger.
But to my amazement I was SHOCKED to see on the right side
as the exhaust goes to the left side it not only bends at 90* it
also gets UNBELIEVABLY smaller ! Where it passes under the
trike and under the drive belt it actually goes into about a
ONE INCH some what retangular shape. Talk about BLOCKAGE.

Why bother putting on LARGER diameter slip-ons when it gets
this small before the muffler ? So as a called to place an order
from cyclesolutionsonline.com I called thier tech service first.
Dammm .... nice people (1st time I ever called) he told me
about the Rush head pipe that does not get small like that.
Anyone running the Rush headpipe confirm this ?

Any thoughts about this from any of you experienced people
here that wrench on bikes ?
Thanks for replies .....
Rob ....

 

[Mr.Wizard]

Rob... all HD touring pipes from 2009 and up are like this.

It's HD's way of making a poor man's 2-1 to produce lower end torque. You will get about 20% exhaust relief out of your left side and 80% on the right side muffler.

When you open the cross under pipe you are reverse engineering this design and opening up your exhaust more to a dual effect. Doing so will cause you to loose bottom end torque. When this happens you will need to take a freeze plug and tap it into the outlet end of the left cross under pipe, tack weld it and drill a 1/2" hole in the plug. This will give you about the same results as the stock style head pipe was designed for.

The stock pipe is a 2-1-2 design, stay with the design or Lyn will not be happy with the end result and you will need to tune again. Unless you drop in a set of small cams you will never be able to get the TQ back.

As far as a muffler choice... any touring muffler will fit her TG with the exception of Rinehart 2" inlet mufflers.

 

[IBTRIKED]

Regarding the felt heat and the heat transferred to the engine lower end (oil sump) and trany from the head pipes, has anyone tried heat wrap as Vance Hines has as a kit for the TriGlide? If so what were the results and could the Pipe covers still be used. I read you can paint the pipes black or silver, (spec Paint) and then paint the Wrap when dry one of several colors.
My one concern is the heat held in could damage something down flow.

Also anyone know of a larger oil filter or an AL or CU cooling fins to go on filter as you would do on a PC Processor. Works great there!

Thanks