Hi there!

I saw that lot of conversion kits to rise displacement, need the cases to be bored, to accomodate bigger bore cylinders.

On the XL1200 what is the maximum displacement can be mounted (cylinder+ pistons) without boring cases?

If I chose for a cylinder that needs cases boring, is it something that can be made with the engine mounted on the frame or is it necessary to dismount it?
Or is necessary to dismount from the frame and dismount completely the engine?

--
Mr. Mechano

1250 cc's, anything bigger and you need to pull the cases, dismantle and have them bored to fit the new cylinders.

NALLIN (NRHS) 1250cc BOLT-ON BIG BORE KIT

MAKE YOUR NEW SPORTY A BIG BORE WITHOUT THE BIG EXPENSE!

From $1195

http://www.nrhsperformance.com/index.shtml

http://www.nrhsperformance.com/images/blackpolished1250kitsmall.jpg

Now that you've got the best looking and most technically advanced Sportster in history in your garage, NRHS wants to help make your new XL run as good as it looks with the introduction of our 1250cc bolt-on big bore kit. Filled with premium components, this kit is the perfect foundation on which to build your American hot-rod, and best of all, no case boring is required for installation! Each of these kits includes a pair of premium quality Axtell all-aluminum nik-a-sil plated cylinders, matching NRHS Hurricane forged pistons with tool steel wrist pins, Total Seal rings, and Cometic EST gaskets. Take your Sporty to the next level with a bolt-on big-bore kit from NRHS!
_____________________________________________


NEW from Nallin: 1430cc BIG BORE KITS FOR THE 2004 & UP SPORTSTER

From $1195

http://www.nrhsperformance.com/images/xl88inchkit.jpg

Turn your new XL into the absolute nastiest hot-rod around! Just introduced, these kits take your Sporty out to the maximum bore size you can get in your stock cases. Of course, this engine kit comes with the finest quality components money can buy: all-aluminum nik-a-sil plated cylinders from Axtell, matching forged Hurricane pistons with tool steel wrist pins, Total Seal rings, and Cometic EST gaskets!

Note: Case boring is required for installation. ($275)

Yes I like the second one...
I saw a Sputhe kit of 1400cc I like too.

The problem is to find the black power coated, and if you find it's always more expensive.

I think the 1250cc is not a so big improvement for the money a new kit costs. Here we use to say (We did 30? We'll do 31...). If I'm going to dismount, I prefer something that will make difficult to say "I want more"...

I was thinking to rebore without dismounting the engine from the frame.

If I dismount the old cylinder, mount the new one till it touch the case, mark on the case the new size around the bottom side of the cylinder with a god permanent marker (like the one used to mark CDs) remove the cylinder.

Close the better I can the hole of the flywheel housing with hydrofile cotton or other material.
Start boring the cases with an air tool. And stop sometimes the job to suck with an hoover with a small pipe the material removed to prevent some powder and small pieces to go into the flywheel housing when the cotton cover will be removed.

The case boring doesn't need to be done with case dimounted and reassembled without flywheel, and with a rotative tool. It's not necessary to do a perfect cyrcular job.
The purpose is only to accomodate the bottom side of the cylinder. It's right centered position is obliged by the 4 rods that will firmly connect with the head.

What do you think about?

--
Mr. Mechano

do they make a 1430cc kit for anything older than 04? 1998 in particular?

do they make a 1430cc kit for anything older than 04? 1998 in particular?


G'day

I'm goin 88" with an NRHS set up on my '98 1200 S


So no probs...... give Aaron or Justin a ring .. or have a look at their website.

Guys, I want to talk about price for a moment, because I realize our stuff is not the lowest priced on the market. Believe me, I realize it. But it's a very conscious decison to carry this stuff over the others. I'm always evaluating what stuff I should be carrying and the criteria is to deliver the best parts available for these bikes.

The big cost in an engine kit is the cylinders. It's also a critical part that can make or break the success of the project. The structural integrity of the cylinder is critical, the cosmetics are a BIG deal with the HD crowd, the straightness and roundness and accuracy of bore is critical, and the quality of the plating process in a nikasil cylinder cannot be overstated.

Just about a year ago, I asked Axtell to develop a new cylinder for the XL market. I needed something better than the available offerings. Ron Dickey runs Axtell, he and I have worked together on a few projects in the past and I found him to be one of the best motor guys and generally smartest people you could ever meet. He took on the project and about 4 months later, delivered prototypes to me. I evaluated the product carefully and came to the conclusion that it was better than anything else on the market. But some of the things that made it better, for example stress honing (the competing product isn't) and the ISO certified plating process, also made it cost a little more.

Well, I'll tell you what, I can't STAND it when customers have a problem. Causes me stress. I want EVERY customer's project to be a success, and I've got to do everything I possibly can to give them the best chance of success possible. So
I made the decision to carry his stuff in all our engine kits, even though they cost a little more than other brands. It was quite a change, because we had been using a different brand for many years and were in fact that company's biggest distributor, selling more of their stuff than anyone. But I can't afford vendor loyalty, my loyalty has to be to my customers. I have to give them the best chance for success I can.

Same kind of deal with our pistons. We have them made to our specs. We sell a lot of pistons and there are several different companies who would love to make our pistons for us and I could sure as hell get a better price. But the quality of the product I'm getting is SUPERB. They make exactly what I ask for and they do a perfect job. I'll pay a little more for that.

Anyhoo, rant mode off, just wanted to pass this along so perhaps people would understand that it's not greed and it's not a random decision. There's a reason.

If you REALLY, want performance and big cubes, let's cut through the bullshit. Go with an S&S Sportster case and racing cylinders and heads. You can get jugs and pistons up to 160 Cubic inches. That will Definately blow away anything else on the street. Cylinders are billet alloy aluminum with high ductility , replaceable alloy steel liners. :tour :tour :laugh

The big cost in an engine kit is the cylinders. It's also a critical part that can make or break the success of the project. The structural integrity of the cylinder is critical, the cosmetics are a BIG deal with the HD crowd, the straightness and roundness and accuracy of bore is critical, and the quality of the plating process in a nikasil cylinder cannot be overstated.


I thought they were the heads.

The market is plenty of good forged pistons and now every mechanical job is made by CNC machines.

The aluminium fusion technology for cylinder building is something common, and the nikasil electro plating threatment is used since 2 stroke '80ies cylinders.

What is strange is that people still believe the price of goods (in every field of our life) is defined by a cost/value relation instead of the market research of "how much a customer can/will spend to owns one".