| Author | Message | ||
     Scottorious |
well i keep hoping the weather warms up so i can ride a little bit but i dont think its gonna happen so its time to rip off the top end and go to town. I need a cam a 1250 kit and headwork...where should i go? | ||
| 186bigtwin |
NRHS | ||
| Brinnutz |
I went with the 1250 Nikasil kit from Revolution... | ||
| Dpg |
I did the 1250 kit on my old trusty '90 Sportster about five years ago and have been really happy with Brian's top end kit. Get a good set of heads and cams and you'll be very happy. I run an S&S Super E and a nice set of 2-1 pipes. Went with the SE cams and springs. Think torque and you'll always have a smile on your face. Safe ride, Gary in Oaktown CA | ||
| The4ork |
what is exactly different with the 1250 kit? is it just bored out cyl's and an oversized piston? | ||
| Scottorious |
nah, its actually new castings, you can either get all aluminum plated cylinders which might be the way to go or you can get the classic iron sleeved aluminum cylinders. The new castings are better pieces of metal in general. A brand new 1250 all aluminum plated cylinder will make more power than a bored out stock cylinder even with everything else staying the same. differences include the heat transfer capabilities plus the way the cylinder expands and contracts. The new cylinders will expand and contract less which means you can run closer tolerances with your pistons. They also are built stroner which means that the cylinder will twist and bend and contort less and your bore will stay true and round the whole length of the cylinder, also means you can run tighter tolerances. finally with all aluminum you get the awesome heat transfer of aluminum, where as when using cast iron sleeves and aluminum cylinders you get two different metals which transfer heat differently, which isnt that great. Those are just a few differences, so no a 1250 kit isnt just bored out cylinders, they are purpose built 1250 cylinders. | ||
| Phelan |
Also the 1250 kit has forged pistons, which are stronger and generally lighter than stock. They also have deeper valve pockets to allow higher-lift cams to be used. | ||
| Preybird1 |
How much money do you want to spend? A new top end and jugs installed can run around 3k-5k depending on your manufacturer. | ||
| Scottorious |
obviously the less money the better. you say top end and jugs insalled, I will be doing the labor. so I am either looking at 700 dollars for the nrhs 1250 kit or 1000 for the revolution 1250 kit, the revolution is the plated cylinder which i am pretty sure i want. | ||
| Preybird1 |
I went with the HD XL heads instead of the xb heads due to the fact that the Xl heads are already drilled for the breather bolts which also supports the throttle body assembly. The head temp sensor hole must still be drilled and tapped. The Xl heads have the same bathtub style . Get the heads done also and get it tuned/mapped correctly or you wasted your money! |
